CN107754877A - Substrate material is PDMS cholera diagnosis multi-channel chip device - Google Patents

Abstract

The present invention relates to the cholera diagnosis multi-channel chip device that a kind of substrate material is PDMS, belong to analysis testing field.Serial problem be present with dimethyl silicone polymer i.e. PDMS that is cheap and easily processing come the substrate for making cholera diagnosis micro-fluidic chip.This case main points are, the selected PDMS with ecosystem surface of substrate, and fastening is positioned at the sample liquid stream terminal of the micro-fluidic chip its neighbor positions manually by the hinge-type fixture for being attached to miniature ultrasonic transducer units, sample liquid stream is induced to be flowed from its sample introduction end of the chip along its pipeline of the chip to the terminal direction with ultrasonic wave, micron silica granule filler is filled up in its pipeline of the chip, its function of the filler includes supporting pipeline inwall, and, with the set of hydrophily fluid channel come the hydrophobic pipeline of compensatory script, and, extruding, cover inner-walls of duct face and thereby reduce the chance that large biological molecule contacts with the internal face.

Description

Substrate material is PDMS cholera diagnosis multi-channel chip device

Technical field

The present invention relates to the cholera diagnosis multi-channel chip device that a kind of substrate material is PDMS, the device is based on anti- Original/antibody specificity reaction carrys out the special purpose device of cholera diagnosis antigen, belongs to analysis testing field.

Background technology

The micro-fluidic cholera diagnostic techniques background of associated multi-channel, may refer to the patents of invention such as CN 200910150930.4 Application case.

Only for the microflow control technique overall general picture of itself, famous micro-fluidic expert Mr. Lin Ping Cheng may refer to not The monograph " diagram Microfluid based Lab on a chip " gone out before long, the monograph is published via Science Press, and the monograph is to micro-fluidic Past of technology, now, and, vision of the future etc. etc., suffer from detail, be deep into long discussion of detail.

So, the Important Problems of this case that to have a talk below concern.

The basic framework of micro-fluidic chip, including it is etched with the substrate of conduit and the cover plate to fit together therewith, institute State the fluid course on substrate, before upper cover plate is assembled, it is apparent on see to be exactly some conduits, wait until lid is covered thereon After piece, just really closure forms the fluid course, and the conduit inner surface of the conduit is together with the part that surround the conduit Cover plate forms described fluid course together；So, it is clear that assemble the fluid course after completing, its inner surface face Long-pending major part is the inner surface area of that conduit, and in other words, the state or property of the conduit inner surface are substantially determined The integrality or property of the fluid course are determined；Therefore say, the inner surface state or interior of this conduit of the structure on substrate Surface nature is key factor；In principle, any material that can be kept or keep its solid forms substantially, can be used To make substrate and cover plate, such as, the material that can act as substrate and cover plate can be monocrystalline silicon piece, quartz plate, sheet glass, height Polymers such as dimethyl silicone polymer, polymethyl methacrylate, makrolon etc.；Certainly, the selection of substrate and the choosing of cover plate Material be able to can also be differed with identical；From the point of view of material consumption, manufacture difficulty and application popularization prospect etc. etc., these Not small difference, the especially selection of that substrate between material be present, have a great influence.

In various substrate making materials, dimethyl silicone polymer, i.e. PDMS, comparatively very easily shaping, at this It is extremely simple that conduit is made on the substrate of sample, and the lower cost for material, substrate is made with the polydimethyl siloxane material, Conduit is being suppressed or etched thereon, and is being engaged with the cover plate that the cheap material such as glass or polypropylene or other plastic sheets makes, It is a kind of more satisfactory selection seemingly；Certainly, patch material can also select to use cheap polydimethyl siloxane material： So, this substrate selection is the scheme of polydimethyl siloxane material, and material is extremely cheap, and making is extremely simple, seems and should also be as It is extremely easy to popularize, promotes.

But thing is really not so simple.

First, this polydimethyl siloxane material, that is, the material that alphabetical PDMS is referred to of abridging, itself are a kind of strong Strong hydrophobic material, conduit is built on this material, if without being operated for the modified of the conduit surface, then, it is whole After body assembling is completed, that is, after covering cover plate, because the conduit its inner surface in structure occupies most fluid course Inner surface, then, its strong hydrophobic property of the PDMS conduits inner surface, is deciding factor, it can be similar to water The fine liquid stream of polar liquid of solution by becoming very difficult, its flow resistance is big, or even in general Micropump is all difficult to Promote, certainly, if cover plate also selects to use the PDMS material, then, problem is substantially identical, similar；Therefore, existing Among having technology, modification is modified particular for the conduit inner surface on the PDMS material, is necessary operation；So, this The individual modified operation for PDMS conduit inner surfaces is pretty troublesomeThat falls nor this problem, forms serious technical puzzlement, It is another problem：PDMS polymer molecules inside its body phase of this PDMS material substrate have to be diffused to the surface, moves automatically The characteristic of shifting, the characteristic that this substrate body phase inside PDMS polymer molecules are diffused to the surface, migrated automatically, will cause by table State after the modification of its inner surface of that conduit of face modifying and decorating can not maintain the sufficiently long time, and that is through surface Holding time for conduit its inner surface state after modification is substantially only sufficient to the time needs for completing laboratory internal test experiments； In other words, by surface is modified or the PDMS conduit inner surfaces of surface modification, after it is modified or institute's shape after modification is said Into surface state can not be lasting, but soon automatically tend to or say become again surface be modified before surface state, compared with The strong hydrophobic surface state of that script is returned in the short time, then, just think, such micro-fluidic chip can be big Amount making, mass storage, it is widely popularized, answer is it is obvious that is, impossible.Conduit on this PDMS material, does not do If surface modification, it can not pump and pass through similar to the fine liquid stream of polar solvent of the aqueous solution, chip also cannot just use；And such as Fruit has been cooked surface modification, can not persistently keep its state after modifying again, or equally can not popularization and application.

According to the literature, there is a kind of expedient solution, be that a small amount of surface-active is added in sample to be tested solution Agent, so as to which during test, dynamic, temporary transient effective surface hydrophilic layer is built temporarily in the PDMS conduits inner surface； However, due to the amphipathic characteristic of surfactant, the introduced surfactant of the program is inevitable simultaneously also can be with sample solution In tested composition occur combination so that tested composition can not be detected normally or it is detected ratio and dubiously dropped It is low；The surfactant is possibly even fully wrapped around by tested composition with micelle form so that tested composition can not be detected or Identification；Therefore, this kind adds the scheme of surfactant into sample solution, is far from a preferable solution.

So, how to accomplish that substrate can either be made using cheap PDMS material, and the conduit can be released Inner surface decorating state can not persistently, chip can not largely make, largely lay in and then be widely popularized and such a make this area The puzzlement that numerous professionals are entangled with for a long time, the highly difficult problem that exactly one its obvious technology barrier can not despise.

Be present many year in the highly difficult problem, so far, not yet properly settled.

Second, the PDMS material of non-surface modification, it is stated that, its surface is strongly hydrophobic above, this strong hydrophobic Material surface and also have another problem, that is, this strong hydrophobic PDMS surfaces can adsorb large biological molecule, and And these adsorbed large biological molecules can also further depression further on PDMS surfaces, gradually fall into it is gradually deep, until It is heavy to be trapped within the body phase of PDMS substrates, in fact, this process, partly it is also due to PDMS material body phase interior polymer Molecule, which has, to be diffused to the surface, caused by travel motion；Such case, it can also be explained from another angle, i.e. continue not Disconnectedly from inside PDMS body phases to those polymer molecules of its diffusion into the surface, migration, its result moved, be little by little by that It has been involved in a bit by the large biological molecule of adsorption within the body phase of PDMS substrates, briefly, these adsorbed biologies Macromolecular is exactly to be swallowed up by PDMS substrate body phases；So, this PDMS substrates body phase swallows up the phenomenon of large biological molecule, its institute Caused by influence, necessarily cause the severe deviations of all kinds of test data of experiment for being related to large biological molecule.

As described above, the problem of PDMS substrates, is, its not only adsorption large biological molecule, and swallow up biological big point Son, so, as the large biological molecule of experiment test object, its disappearance will not stop because surface saturation is adsorbed, and It is, it is constantly adsorbed, also constantly swallowed up.

On PDMS substrates, its body phase is constantly swallowed up and tests showing for associated biomolecule macromolecular in related experiment test process As, it is to say that another kind, which is explained, substantial amounts of Minute pores in PDMS body phases be present, associated biomolecule macromolecular by after adsorption, Depression enters these Minute pores, and then is swallowed up；However, inventor thinks, those can allow the sky of miniature scale Qi leel squeezes into the Minute pores therebetween, not equal to saying that they also can directly allow the large biological molecule of relative large scale to enter Enter, both difference on yardstick are huge, must not make sweeping generalizations.Explanation is bypassed, in any case, as dependence test analysis object Large biological molecule is adsorbed by PDMS substrate conduits inner surface, and then is constantly swallowed up by PDMS substrate body phases, and this is known objective Existing phenomenon.

, can be from containment PDMS surfaces pair in order to prevent swallow up effect of this PDMS substrate bodies relative to large biological molecule The absorption of large biological molecule addresses, and method is chemically modified modification aiming at the PDMS material surface, for For PDMS is the situation of substrate material, modification exactly is chemically modified to the surface of described channel portion, by chemistry The conduit inner surface of modification, can contain its absorption to large biological molecule, and then avoid large biological molecule quilt PDMS substrate body phases are swallowed up；But or that old problem, that is, the chemical modification on PDMS material surface is modified it Surface state afterwards can not persistently be kept, the polymer molecule inside the PDMS substrate body phases its diffuse to the surface, migrate automatically Process, can soon by that by surface chemical modification be modified conduit inner surface state become again script it is strong it is hydrophobic simultaneously And the state of strong adsorption large biological molecule, in other words, no matter how professionals in the field turn from side to side, the PDMS substrates its Conduit inner surface is always rapidly to strong hydrophobic surface state evolution.

So, how can either obtain that PDMS material price is extremely cheap, substrate makes extremely easy benefit, and can is enough Reach and contain the absorption process of the PDMS substrate conduit inner surfaces to large biological molecule for a long time, and then prevent PDMS substrate bodies relative The effect of swallowing up of large biological molecule so that related chip manufactured goods are able to maintain that a prolonged enough, rational shelf-life, It is exactly a very intractable problem.The problem equally makes this area numerous specially as another problem addressed above Industry personnel are entangled with, perplexed for a long time, and the problem is equally the highly difficult problem that its obvious technology barrier can not despise.Should Also be present many year in problem, so far, also not yet properly settled.

Third, the polydimethyl siloxane material, namely PDMS material, the active force very little wherein between polymer molecule, The polymer molecule of low polymerization degree inside its body phase is in constantly into the dynamic process of surface migration, therefore, includes PDMS After it has been formed, the surface topography in its inner-walls of duct face of chip can be because of described low polymerization degree polymer point for the chip of substrate material Son moves about, pours into the surface and change, and the change of its pattern is somewhat similarly to Rheological Deformation, trickling deformation or creep and become Pattern caused by shape institute is possible changes；In the higher PDMS material of some low polymerization degree component ratios, this kind somewhat similar Can be showed in the phenomenon of Rheological Deformation, trickling deformation or the deformation of creep must be than more significant；This kind include PDMS substrates chip its The dynamic of inner-walls of duct surface topography after shaping changes property, namely the described property or stream that are somewhat similarly to Rheological Deformation Dropping down the property of deformation or the property of the deformation of creep, the word of rheology one is applied mechanically in this case, integration, also referred to as the rheological equationm of state or rheology become Shape property, the dynamic of corresponding inner-walls of duct face pattern change, and this case is also referred to as rheology；As described above, because of this kind of material Expect certain Rheological Deformation property as described above that its own has, its manufactured goods actually can at leisure Rheological Deformation and cause The manufactured goods total form generation changes；Influence caused by its Rheological Deformation property, it is to be not easy to feel in terms of macroscopic perspective Examine, still, for the very fine micro-fluidic chip of its internal structure, the rheological equationm of state can but cause bigger shadow Ring, the fluid course namely the pipeline therefore, during pre-production formed, because the wall of its tube chamber of pipeline is main It is the wall of PDMS materials, so, the cross-sectional area of the pipeline actually can gradually become because of rheology over time It is small, stated differently, since the reason for the rheology, the natively finer pipeline that is flowed through for liquid sample Its tube chamber the more can become the more narrow, in the case of flow time is sufficiently long, or even the pipeline tube chamber can partly close or all Ground closes, and then make it that sample fluid course is thoroughly blocked, and closes with being even also not reaching to its luminal part of pipeline The degree closed or fully closed, its fluid passage that can be provided of that pipeline narrow because of rheology, then, in pipeline Its inner surface originally be exactly strongly it is hydrophobic in the case of, aqueous sample liquid is just more difficult to by becoming more so because of rheology Narrow micro-channel, then, the influence of substrate rheology how is resisted, maintains the basic framework of the pipeline not occur seriously to become for a long time The problem of shape, also, keep the long-term unobstructed of the pipeline is exactly a urgent need to resolve.

The content of the invention

The technical problem to be solved by the invention is to provide a package solution, solves totally above A series of problems addressed, also, the solution is applied to cholera diagnosis multichannel micro-fluidic chip field, form one The new cholera diagnosis Multichannel device of kind.

The present invention solves the technical problem by following scheme, and the device that the program provides is that a kind of substrate material is Multi-channel chip device is used in PDMS cholera diagnosis, and the structure of the device includes multichannel micro-fluidic chip, the micro-fluidic chip Structure include being bonded to each other installing substrate and cover plate together, the substrate and cover plate are plate object or tablet, should The channel structure via mould pressing process or etching technics formation is contained in that face towards the cover plate of substrate, and the substrate also contains Be connected with the channel structure and pierce the substrate via mould pressing process, etching technics or simple drilling technology formed window Structure, it is bonded to each other the substrate that is installed together and the cover plate and has been built into containing pipeline configuration and has been attached thereto jointly The micro-fluidic chip of liquid pool structure, the locations of structures of the pipeline are located at the interface zone that the substrate is bonded to each other with the cover plate, should Its side of window is blocked by the cover plate and opposite side opens, and the locations of structures of the window is exactly the locations of structures of the liquid pool, institute The quantity for stating liquid pool is three, and its locations of structures of two liquid pools therein is located at the sample introduction end of the micro-fluidic chip, remaining one When its locations of structures of individual liquid pool is located at the test of the micro-fluidic chip actual sample introduction in its chip liquid flowing terminal, the terminal with The sample introduction end is located remotely from each other, and one end of the pipeline is distinguished via the manifold shape turnout for being similarly positioned in the interface zone being bonded to each other It is remaining with the Liang Ge liquid pools UNICOM positioned at sample introduction end, this of the terminal of the other end of the pipeline with being located at the micro-fluidic chip Under a liquid pool UNICOM, and, the working electrode that is sequentially respectively installed in the pipeline on diverse location and to electrode with And reference electrode, the working electrode by conductive electrode and be attached on the conductive electrode embedded cholera specificity The gold size sensitive membrane of antibody is formed, and the construction of the pipeline is in parallel construction, and the pipeline in parallel construction is by four branched pipes Road is in parallel to be formed, and the quantity of the working electrode is four, and the installation position of four working electrodes is located at described four respectively In lateral, and, the specific antibody in its top layer gold size sensitivity membrane structure of four working electrodes is to cholera respectively Four kinds of cholera antibody materials that antigen can be specifically bound, four kinds of antibody materials are cholera TP0821 antibody and cholera respectively TP0319 antibody and cholera TP0624 antibody and cholera O139 mycoprotein antibody, its material of the working electrode is gold Sheet or thread is presented in material or thermal decomposition conducting polymer material, its pattern of the working electrode, and emphasis is its material of the substrate Matter is dimethyl silicone polymer material, and its surface of the substrate is the surface of primary form, the surface of the primary form its be meant to Be the not primary form of the material by any surface chemical modification or any surface chemical modification surface, the device Structure also include hinge-type fixture, the hinge-type fixture its appearance profile likeness in form hinge, the hinge-type fixture is by being hinged Two hinges together and matched through a fastening screw of two hinges and one with the fastening screw and with What the fastening screw connected together is used for the nut of fastening and hand break loose composition manually, two hinges of the hinge-type fixture Respectively mutually drawn close with its tip and clamp the micro-fluidic chip, the tip is positioned at the neighbouring terminal of the micro-fluidic chip Locations of structures on, fixation is attached in a hinge at least in and is equiped with miniature ultrasonic transducer units, and, it is high Frequency vibration swings electric signal transmission cable, and one end and the miniature ultrasonic transducer units of the higher-order of oscillation electric signal transmission cable are connected to Together；The hinge-type fixture provides a function of facilitating the device to disassemble；Its major function of the miniature ultrasonic transducer units It is in the actual sample introduction test of micro-fluidic chip, is filled using the sample introduction end and the terminal with the miniature ultrasonic transducer units If the difference on the distance between position difference and its ultrasonic intensity experienced, its boundary of sample introduction end described in induced synthesis Difference between face tension force and the terminal its interfacial tension, interfacial tension difference between the micro-fluidic chip both ends can be Pressure gap is formed between the both ends of the micro-fluidic chip, the pressure gap can drive sample solution to the end flow； It is soft and have the substrate of the dimethyl silicone polymer material of elasticity its function and include with its property to the strong absorption of ultrasonic wave, Ultrasonic wave is absorbed strongly, and thereby micro-fluidic chip terminal to the limited short distance between the sample introduction end it Inside realize the rapid decrement of ultrasonic intensity；And many silica dioxide granules, many silica dioxide granules are filled in In the pipeline, its tube chamber of the pipeline is filled up by many silica dioxide granules, its particle diameter model of the silica dioxide granule Enclose between 10 microns and 200 microns, the silica dioxide granule be silica crystalline particles, silica glass granule or Its inorganic glass particles of shared percentage by weight more than 80% of silica composition, a remaining liquid pool are also referred to as eventually Liquid pool is held, is filled with some high hydroscopic resin particles in the terminal liquid pool, its opening end of terminal liquid pool is by breathable microporous film institute Cover.

Only for the word of high hydroscopic resin one art-recognized meanings of itself, come for the professional of chemical field Say, be known.

The high hydroscopic resin is commercially available.

Only for the word of breathable microporous film one art-recognized meanings of itself, for the professional of technical field of membrane, It is known.

The breathable microporous film is commercially available.

Its particle diameter of the silica dioxide granule can be that the basis between 10 microns and 200 microns is actually needed and any The particle diameter specified, such as 10 microns, 30 microns, 70 microns, 100 microns, 150 microns or 200 microns of the particle diameter, etc..

The scope of further preferred its particle diameter of the silica dioxide granule is between 100 microns and 200 microns.

Its pattern of the silica dioxide granule is unlimited, and the silica dioxide granule for example can be spheric granules, rod-shaped particles, length Cube shape particle or any amorphous granular.

The various silica dioxide granules manufacturing technology of itself is known technology.

Various forms, the silica dioxide granule market of all size are on sale.

The silica dioxide granule can also customize to specialized factory.

The preferred scope of its internal diameter of pipeline is between 500 microns and 1000 microns；It is but excellent compared to above-mentioned The internal diameter of the pipeline scope of choosing, more tiny internal diameter of the pipeline or thicker internal diameter of the pipeline are also what this case was allowed.

Described miniature ultrasonic transducer units can certainly be all installed in two hinges；But only install one Individual miniature ultrasonic transducer units are dealt with enough to be used.

The word of hinge one art-recognized meanings of itself are known.

The gold size sensitive membrane is to be sufficiently mixed chitosan gold size solution and cholera specific antibody solution uniformly, is used a little Sample instrument point sample is coated on specified structure position, and forms its drying and forming-film.Cholera specificity in the gold size sensitive membrane Antibody is the cholera antibody of horseradish peroxidase or glucose oxidase mark, and the gold size sensitive membrane has been included as solid Determine above-mentioned each cholera specific antibody and introduce complementary medium therein, the complementary medium such as chitosan, acetic acid are fine Dimension is plain, gelatin is therein a kind of or their mixture.

The pipeline and the lateral and the manifold shape turnout in the microfluidic chip structure, in it Footpath size may each be arbitrarily selected size, still, for as far as possible less with prepare liquid sample and reduction reagent loss etc. Consideration, the pipeline and the lateral and the manifold shape turnout preferably select capillary level passage, institute The passage for stating capillary level implies that its internal diameter passage suitable with the internal diameter of the capillary on ordinary meaning.The capillary is in it The shape of cross section of portion's passage can be arbitrary shape, and the shape of cross section is for example circular, oval, square, rectangle, bar Shape, naturally it is also possible to it is the linear of bending arbitrarily be present, also, the interior shape of the capillary is with the extension of pipeline, The shape of cross section of different parts can also allow to be different shapes.Only for the word of capillary one, its art-recognized meanings is public Know.

What is be related in structure is the electrode of microsize to electrode and reference electrode, and its electrode shape, which may each be, appoints The selected shape of meaning, the arbitrarily selected shape such as square piece shape, rectangular patch, strip or round sheet etc..It is described Art-recognized meanings to electrode and the reference electrode vocabulary of itself are known.

It is related to several liquid pools in this case microfluidic chip structure, the liquid pool is the pond shape or capsule for transitional liquid storage Shape constructs, and its shape of the inner chamber of each liquid pool may each be arbitrarily selected shape, and the cavity shape is for example round Cylindrical cavity shape, square column type cavity-like, oblong cavity shape or spherical hollow space shape etc..The size of the liquid pool can be any Selected size, still, in order to as far as possible less with prepare liquid sample and reduce reagent loss, the liquid pool be preferably capable of with The liquid pool of the microminiature of capillary matching.

Only for professional of the word of ultrasonic transducer one art-recognized meanings of itself for ultrasonic technology field, It is known.

Various sizes, variously-shaped ultrasonic transducer are commercially available；Its size of commercially available miniature ultrasonic transducer units It may diminish to the magnitude only calculated with millimeter.

Only with regard to miniature ultrasonic transducer units its technique for fixing on general industry application solid body surface its It is known general technology for the professional in ultrasonic technology field for body.This case is not to this expansion superfluous words.

Only with regard to naked PDMS substrates itself conduit molding or lithographic technique for, be open-and-shut known technology； Similarly, the technology of hole-opening is even more known simple technique on naked PDMS substrates.This case is not also to this expansion superfluous words.

The industrial products market of involved its all size of higher-order of oscillation electric signal transmission cable is on sale.

The structure of the device can also include higher-order of oscillation electric signal generator；The higher-order of oscillation electric signal transmission cable Its other end can be connected with the higher-order of oscillation electric signal generator.

The involved higher-order of oscillation electric signal generator technology of itself, come for the professional in ultrasonic technology field Say, be simple and known；The higher-order of oscillation electric signal generator can customize to ultrasonic instrument specialized factory.

The preferred scope of its specified ultrasonic wave transmission power of the miniature ultrasonic transducer units is between 5 milliwatts and 9000 milliwatts Between；The preferred scope of the frequency of its ultrasonic wave operationally launched of the miniature ultrasonic transducer units be between 100KHz with Between 12MHz.

This case device can further include some annexes certainly, and the annex is such as multiple tracks electrochemical workstation Deng the art-recognized meanings of the multiple tracks electrochemical workstation are known.The each work being related in this case microfluidic chip structure Electrode and to electrode and reference electrode etc., special it can get lines crossed and the multiple tracks electrochemical workstation via corresponding respectively The corresponding interface coupled.It is described that special to get lines crossed be for by each phase of each electrode and the multiple tracks electrochemical workstation Answer the private cable that interface is coupled to each other.The micro-fluidic chip in this case device, its structure can also include micro-valve, The quantity of the micro-valve is unlimited, and according to being actually needed, the micro-valve can be installed in any need in the microfluidic chip structure Position to be mounted；The word of micro-valve one is for the professional of micro fluidic chip technical field, the art-recognized meanings of itself It is known；The micro-valve itself manufacturing technology and the use of technology is also known；The component that the micro-valve is not required.

The diameter of the working electrode can allow to be that any setting is easily installed the suitable diameter used, still, It is recommending or say preferable its scope of the diameter between 0.1 micron to 2000 microns；The length of the working electrode can To allow to be that any setting is easily installed the length used, it is however recommended to or to say the preferable length its scope be 1 Micron is between 15000 microns.

It is installed in by spraying or point sample instrument point sample or the coating of other appropriate process described in the working electrode surface layer Gold size sensitive membrane, its thicknesses of layers can allow be any setting treat sample measuring liquid occur electrical signals response thickness, It is however recommended to thickness preferable thickness is between 10 nanometers and 200 nanometers in other words.

The cover plate in chip structure, its material can allow to be any electrical insulating property material, such as：Polypropylene, Glass, polymethyl methacrylate, dimethyl silicone polymer, etc., in order to make smaller size of micro-fluidic chip, for example do Into the micro-fluidic chip of only 2.0 centimetres to 3.0 centimetres of super-small of length, and realized in the extremely short distance to ultrasonic wave Extremely fast decay, can preferably dimethyl silicone polymer be used as cover plate.Certainly, selected on large-sized micro-fluidic chip Using dimethyl silicone polymer it is used as the cover plate, and this case technical scheme is allowed.

Positioned at the sample introduction end of the micro-fluidic chip two liquid pools its with positioned at the micro-fluidic chip terminal should Air line distance between a remaining liquid pool can be arbitrarily selected suitable distance, still, the distance as needed Preferred value is between 3 centimetres and 7 centimetres.

Described its thickness of cover plate and substrate can allow be any setting the thickness for being easy to assembling, the thickness of recommendation or say Preferable thickness is between 1.0 millimeters and 5.0 millimeters.Less thickness is advantageous to save material.

The application method of this case micro-fluidic chip：

Itd is proposed first based on this case and the first public new liquid stream driving principle, its application of this case micro-fluidic chip are transported Among work, the new liquid stream driving method is determined completely without involving any additional Micropump.

The interfacial tension difference that this case is formed between micro-fluidic chip both ends caused by the ultrasonic wave, Driving liquid stream flows in the capillary channel of the four-way micro-fluidic chip, right respectively using four-way electrochemical analytical instrument Four kinds of cholera diagnostic antigens are detected.

The specific detection of this case micro-fluidic chip is as follows using step：

1st, blood serum sample liquid is added in micro-pipe road, under ultrasonic wave driving, various cholera antigen molecules are by each logical The cholera specific antibody for the corresponding horseradish peroxidase-labeled that gold size sensitive membrane embeds captures on electrode surface in road.

2nd, the cholera specific antibody of horseradish peroxidase-labeled is formed immune multiple with the cholera antigen in blood serum sample Compound.

3rd, using multi-channel electrochemical analyzer, the electron mediators such as catechol are added, it is above-mentioned using amperometric detection Curent change caused by reaction, it is derived from the species and content of various analytes.

4th, result is subjected to comprehensive analysis, comprehensive diagnos is carried out to cholera antigen.

It is an advantage of the invention that its close position positions the hinge-type folder in the terminal of the micro-fluidic chip Tool, installation miniature ultrasonic transducer units are attached in the hinge-type fixture its hinge, are launched with the miniature ultrasonic transducer units low The ultrasonic wave of power, high-frequency band, meanwhile, using its strong absorbability to ultrasonic wave of dimethyl silicone polymer substrate, In shorter distance, it is, in from the terminal to the very short distance of only several centimeters yardsticks the sample introduction end, Reach the rapid decrement of ultrasonic intensity, the difference of the interfacial tension thereby caused at the both ends of the micro-fluidic chip, And then using the pressure gap between its both ends for being formed of the difference of the interfacial tension between the both ends, drive test liquid Stream flows in the pipeline to the terminal direction.By this case liquid stream drive scheme, altogether dispense with traditional The equipment of Micropump etc；The micro-fluidic chip of Micropump is eliminated, its structure is more succinct, and its production process is less, its cost of manufacture Lower, this kind of succinct structure is more beneficial for the low cost application for reaching micro-fluidic chip.

Its scheme of this case and by the pipeline except electrode installation take up space in addition to all clearance spaces whole Filled up with the silica dioxide granule.Those are filled in the silica dioxide granule in pipeline, and this case is to its overall abbreviation titanium dioxide Silicon grain filler, its function include support, withstand the tube chamber of the pipeline its inwall so that the tube chamber of the pipeline is from because of institute State rheology and narrow, prevent its reduced cross-sectional area of the tube chamber of the pipeline or even close, so as to maintain the base of the pipeline for a long time Serious deformation does not occur for this framework.

Numerous silica dioxide granule entities are mutually banked up under this case framework together at random in the pipeline, the titanium dioxide The function of silicon grain filler, also include certainly with the hydrophilic surface of its silica dioxide granule, utilize each adjacent titanium dioxide Mutual formed complications are continuous and its inner surface that is mutually close together by water-wetted surface of silicon grain has hydrophilic The space of property, in the hydrophilic fluid channel of the pipeline Inner Constitution network morphology, although this complications can be continuous All the time the fluid channel with hydrophilic nmature, then, inside the tube chamber of the pipeline simultaneously and a plurality of miniflow deposited The effect of its synthesis of road, integrated, cumulative superposition in other words, is the equal of the relatively fine hydrophilic capillary of caliber Passage；Its presence of the continuous hydrophilic fluid channel of the complications, the PDMS of the primary form is counteracted to a large extent The flow resistance for liquid sample caused by the strong hydrophobic property in its surface of substrate；In other words, because of liquid sample, it is accounted for The composition of maximum ratio is water, and liquid sample is substantially exactly the aqueous solution, therefore, the presence of the silica dioxide granule filler, Can significantly overcome with the unmodified PDMS substrates of hydrophobic property and surface its to the aqueous solution it is incompatible, repel and Barrier effect, so be greatly reduced belong to properties of Aqueous Solution sample liquid stream its be advanced through the resistance of pipeline.

Under this case framework, inside the tube chamber of the pipeline, the area of its lumen wall wall of former pipeline, because of described two The rigid of silicon oxide particle filler ties up, the table of part hydrophobic property that still can also be exposed on lumen wall wall Its area of face is already dramatically reduced, and the area on its still exposed part surface for belonging to hydrophobic property is much Less than the wall surface area of the hydrophobic property of the lumen wall wall in the presence of no silica dioxide granule filler； So, under this case framework, in its lumen of the pipeline, its remaining hydrophobic surface increases surface newly with hydrophilic part, and it is folded Adding, comprehensive, summation, cumulative technique effect, is to form the surface for tending to be hydrophilic on the whole；In other words, in institute State inside the tube chamber of pipeline, its interfacial tension between sample solution of the part surface of remaining hydrophobic property, plus parent The part of aqueous nature increases its interfacial tension between sample solution of surface newly, that it is superimposed, comprehensive, summation, cumulative Technique effect, be so that its solid-liquid interfacial tension inside the tube chamber of the pipeline synergy level off to capillary glass tube its Interfacial tension between tube chamber inner surface and sample solution.

Therefore, exist in the pipeline under this case framework for having stated silica dioxide granule filler, while rely on this Case sample liquid stream drive scheme, it becomes possible to the driving to sample liquid stream is reached with relatively low ultrasonic power, with this case mechanism The test liquid is driven to flow to the end flow.

On the other hand, due to its rheological equationms of state of the PDMS as substrate material, it is filled in the pipeline The interior silica dioxide granule filler, can gradually by constantly Rheological Deformation and to arest neighbors free space promote PDMS The pipeline wall of material more tightly wraps up, and this process eventually causes those part two for pressing close to the lumen wall wall Silicon oxide particle is stuck in original place or is stuck in original place or embedding in-situ silica dioxide granule and its embedded in original place, the part Incarceration is together, described due to this reason each other for the remaining silica dioxide granule banked up with being mutually closely packed together Silica dioxide granule filler just will not move in the pipeline easily, silica dioxide granule therein be also substantially all by Original place is locked in, therefore the stream framework of the micro-fluidic chip can be kept for a long time.

The particle size range of its particle of this case silica dioxide granule filler between 10 microns and 200 microns, compared to For general organic molecule, general large biological molecule, the particle diameter of its particle of this case silica dioxide granule filler can be rated as huge Greatly, due to its huge particle diameter, and the inner surface of the surface of its polarity and the pipeline of strong hydrophobic PDMS materials can not Mutually perhaps say and mutually melt, then, the huge silica dioxide granule of this kind of particle diameter can not be by the pipeline of PDMS materials Surface is adsorbed, and can not more be swallowed up by the inner surface of the pipeline of PDMS materials, the huge titanium dioxide of this kind of particle diameter Silicon grain surely not be fully sunk in easily or sink to completely PDMS materials its among intrinsic many Minute pores, and Because above it is stated that the rheology the reason for, the silica dioxide granule filler can be stuck in original place in other words it is embedding In original place without moving easily.

Inside the tube chamber of the pipeline, its lumen wall wall of former pipeline is entirely the surface of hydrophobic property originally, such as Upper described, under this case framework, rigid because of the silica dioxide granule filler ties up, on lumen wall wall still also Its area of the surface of part hydrophobic property that can be exposed is already dramatically reduced, and it is still exposed to belong to hydrophobicity The area on the part surface of matter has been far smaller than the tube chamber in the presence of no silica dioxide granule filler The wall surface area of the hydrophobic property of inwall wall；The reason for because of the rheology, it is close to those dioxies of lumen wall wall Silicon carbide particle, little by little it is partially embedded into or is partly absorbed among the lumen wall wall, the dioxy among the state Silicon carbide particle its towards the part surface of lumen wall wall with have occurred and that matching deformation the lumen wall wall it is tight Closely connected conjunction, then, the matching is deformed and closely pasted with silica particles having occurred and that in lumen wall wall The part wall of conjunction actually can not contact with flowing through the sample solution of pipeline, that is to say, that the wall of this part is Through suction-operated can not be produced to the large biological molecule therein that flows through the sample solution of pipeline and organic molecule.Based on above-mentioned Mechanism, then because fill up the pipeline the silica dioxide granule filler its presence, its lumen wall wall of the pipeline The overwhelming majority in face is tightly covered, and these described walls tightly covered can not be with flowing through the pipeline Sample solution contact, only remaining fraction be not brought into close contact by its surface of silica dioxide granule, tightly cover Hydrophobic surface may be contacted with sample solution, in other words, under this case framework, large biological molecule in sample solution and have Its direct touch opportunity with hydrophobic PDMS walls of machine molecule is significantly reduced, thus, the lumen wall faces of PDMS materials its The adsorptive hindrance and interference of swallowing up of large biological molecule and organic molecule are greatly reduced；As described above, this case scheme Be advantageous to exclude or weaken the adsorptive hindrance and swallow up interference, be advantageous to be lifted the reliability of correlation analysis test data.

As described above, this case silica dioxide granule filler, its function actually includes being similar to being directed to PDMS materials Inner surface of pipeline carry out chemical modification effect, functioning as its this respect of this case is by the pipeline of the PDMS materials Surface by the surface modification of hydrophobic property into the surface of hydrophilic nmature, still, with general, usual PDMS surface chemical modifications Its hydrophilic chemical decorative layer retention time is short, hydrophilic effect can not keep situation prolonged enough different, particle described in this case Huge silica dioxide granule filler, its particle being stuck by rheology can not both be moved easily, its huge particle diameter Particle can not more be swallowed up easily by the inner-walls of duct of PDMS materials, and therefore, its from this respect is similar to surface chemical modification Technique effect on see, its technique effect of this case, be form it is permanent, can not erase, can not consume, not be corroded, not by Hydrophilic surface reforming layer swallowing up, being not dissolved, it is just comparable to one kind in its correlation table of PDMS base materials in effect The permanent hydrophilic modifying superficial layer built on face.

It is related that the technical scheme of this case has dissolved its application to dimethyl silicone polymer substrate addressed above totally A series of technical barriers.Based on this case scheme, the very cheap polydimethyl siloxane material of this kind is just possible to micro- at this It is prepared by fluidic chip, production, using etc. field play bigger effect.

The miniature ultrasonic transducer units have been installed in fixation in the hinge-type fixture its hinge in this case structure, the structure A function of facilitating the device to disassemble is provided, in this way, the hinge-type fixture is together with miniature ultrasonic appended in its hinge Transducer just easily can be mutually disengaged with the micro-fluidic chip, then, the component that the part can freely depart from just can be good Property is re-used cyclically many times；The architectural feature is advantageous to save the use cost of the device.

Brief description of the drawings

Fig. 1 is the schematic diagram of this case device embodiment chip part construction, it is shown that the vertical view of this structure The structural form of chip internal pipeline and each electrode and each related liquid pool under angle, the hinge-type is not depicted in the figure The miniature ultrasonic transducer units set up on fixture and its hinge and other annexes.

Fig. 2 is its rough outside side view of this case device.

In figure, 1,2,10 be the different liquid pool of three installation positions respectively, and 3 be manifold shape turnout, and 4,7,11,14 are respectively Installation position is different but four laterals parallel with one another for forming UNICOM's structure in parallel, and 5 be its that be installed in lateral 4 Specific antibody material in the gold size sensitivity membrane structure of top layer is the working electrode of cholera TP0821 antibody, and 6 be to be installed in branch The specific antibody material in its top layer gold size sensitivity membrane structure in pipeline 7 is the working electrode of cholera TP0319 antibody, 12 It is that specific antibody material in its top layer gold size sensitivity membrane structure being installed in lateral 11 is cholera TP0624 antibody Working electrode, 13 be specific antibody material in its top layer gold size sensitivity membrane structure being installed in lateral 14 for suddenly The working electrode of random O139 mycoproteins antibody, 8 be to electrode, and 9 be reference electrode, and 15 be hinge-type fixture, and 16 signs are be hinged Mechanism position, 17 be fastening screw, and 18 be higher-order of oscillation electric signal transmission cable, and 19 be miniature ultrasonic transducer units, 20, 25 be two different hinges of locations of structures respectively, and 21 be cover plate, and 22 be substrate, and 23 be sample introduction end, and 24 be terminal, and 26 be spiral shell Cap；The hinge-type clamp structure in legend is only the legend structure of signal, and actual its structure of the hinge-type fixture is not limited to this Legend hinge-type clamp structure；Arrow in legend indicate the micro-fluidic chip its in actual motion, by pressure at two ends Difference driving, the flow direction of its sample liquid stream.

Embodiment

In this case that Fig. 1 and Fig. 2 are shown embodiment, the structure of the device includes multichannel micro-fluidic chip, should The structure of micro-fluidic chip includes being bonded to each other the substrate 22 and cover plate 21 of installing together, and the substrate 22 and cover plate 21 are What is formed via mould pressing process or etching technics contained in plate object or tablet, that face towards the cover plate 21 of the substrate 22 Channel structure, the substrate 22 also containing be connected with the channel structure and pierce the substrate via mould pressing process, etching technics Or the window structure that simple drilling technology is formed, it is bonded to each other the substrate 22 being installed together and is built into jointly with the cover plate 21 Micro-fluidic chip containing pipeline configuration and the liquid pool structure being attached thereto, the liquid pool are liquid pool 1, liquid pool 2, liquid pool 10, the locations of structures of the pipeline is located at the interface zone that the substrate 22 is bonded to each other with the cover plate 21, and its side of the window is by this Cover plate 21 blocks and opposite side opens, and the locations of structures of the window is exactly the liquid pool 1, liquid pool 2, the locations of structures of liquid pool 10, The quantity of the liquid pool is three, and two liquid pools therein are that liquid pool 1 and liquid pool 2 its locations of structures are located at the micro-fluidic chip Sample introduction end 23, a remaining liquid pool are its chip when liquid pool 10 its locations of structures is located at the micro-fluidic chip actual sample introduction test The terminal 24 of interior liquid flowing, the terminal 24 are located remotely from each other with the sample introduction end 23, and one end of the pipeline is via being similarly positioned in the phase The manifold shape turnout 3 for the interface zone being mutually bonded respectively with the liquid pool 1 positioned at sample introduction end 23 and the UNICOM of liquid pool 2, the pipeline The other end and the remaining liquid pool of the terminal 24 positioned at the micro-fluidic chip be the UNICOM of liquid pool 10, and, according to Sequence is respectively installed in working electrode in the pipeline on diverse location and to electrode 8 and reference electrode 9, the working electrode It is made up of conductive electrode and the gold size sensitive membrane for having embedded cholera specific antibody being attached on the conductive electrode, should The construction of pipeline is in parallel construction, and the pipeline in parallel construction is made up of four lateral parallel connections, the working electrode Quantity be four, the installation positions of four working electrodes is respectively in four laterals, this four work electricity Pole is working electrode 5, working electrode 6, working electrode 12, working electrode 13 respectively, and, four its top layer of working electrode gold Specific antibody in glue sensitivity membrane structure is the four kinds of cholera antibody materials that can be specifically bound to cholera antigen respectively, and this four Kind antibody materials are cholera TP0821 antibody and cholera TP0319 antibody and cholera TP0624 antibody and cholera respectively O139 mycoprotein antibody, for specifically deploying, 5 be in its top layer gold size sensitivity membrane structure being installed in lateral 4 Specific antibody material be cholera TP0821 antibody working electrode, 6 be that its top layer gold size being installed in lateral 7 is quick Feel the working electrode that the specific antibody material in membrane structure is cholera TP0319 antibody, 12 are installed in lateral 11 Specific antibody material in its top layer gold size sensitivity membrane structure is the working electrode of cholera TP0624 antibody, and 13 be to be installed in point The specific antibody material in its top layer gold size sensitivity membrane structure in branch pipe(tube) 14 is the work of cholera O139 mycoprotein antibody Make electrode, the working electrode 5, working electrode 6, working electrode 12, working electrode 13 its material are gold material or thermal decomposition Conducting polymer material, the working electrode 5, working electrode 6, working electrode 12, working electrode 13 its pattern present sheet or Thread, emphasis is, its material of the substrate 22 is dimethyl silicone polymer material, and its surface of substrate 22 is the table of primary form Face, the surface of the primary form its be intended to refer to not by any surface chemical modification or any surface chemical modification should The surface of the primary form of material, the structure of the device also include hinge-type fixture 15, its appearance profile of the hinge-type fixture 15 Hinge is similar to, the hinge-type fixture 15 is by two hinges 20,25 for being mutually hinged and through two hinges 20,25 A fastening screw 17 and one matched with the fastening screw 17 and be used for hand with what the fastening screw 17 connected together The nut 26 of dynamic fastening and hand break loose is formed, and two hinges 20,25 of the hinge-type fixture 15 are respectively mutually drawn close with its tip And the micro-fluidic chip is clamped, the tip is positioned in the locations of structures of the neighbouring terminal 24 of the micro-fluidic chip, extremely Attach to fix in hinge described in few one of which and be equiped with miniature ultrasonic transducer units, be in hinge 20 in this legend Attach and install the miniature ultrasonic transducer units 19, it is of course also possible to allow all to install miniature ultrasonic in two hinges 20,25 Wave transducer, but, just it is enough to answer it is, in general, that attaching one miniature ultrasonic transducer units of installing only in a hinge Pay and be actually needed, and, higher-order of oscillation electric signal transmission cable 18, one end of the higher-order of oscillation electric signal transmission cable 18 is with being somebody's turn to do Miniature ultrasonic transducer units 19 link together；The hinge-type fixture 15 provides a function of facilitating the device to disassemble；Should Its major function of miniature ultrasonic transducer units 19 be in the test of micro-fluidic chip actual sample introduction, using the sample introduction end 23 and The distance between the terminal 24 and the installation position of miniature ultrasonic transducer units 19 difference and its ultrasonic wave experienced Difference between difference in intensity, its interfacial tension of sample introduction end 23 described in induced synthesis and the terminal 24 its interfacial tension, The micro-fluidic chip both ends be interfacial tension difference between sample introduction end 23 and terminal 24 can the micro-fluidic chip this two End is to form pressure gap between sample introduction end 23 and terminal 24, and the pressure gap can drive sample solution to the direction of terminal 24 Flowing；It is soft and have the substrate 22 of the dimethyl silicone polymer material of elasticity its function and also include with it to the strong suction of ultrasonic wave The property of receipts, ultrasonic wave is absorbed strongly, and thereby between micro-fluidic chip terminal 24 to the sample introduction end 23 The rapid decrement of ultrasonic intensity is realized within limited short distance；And many silica dioxide granules, many dioxies Silicon carbide particle is filled in the pipeline, and its tube chamber of the pipeline is filled up by many silica dioxide granules, the titanium dioxide For its particle size range of silicon grain between 10 microns and 200 microns, the silica dioxide granule is silica crystalline particles, dioxy SiClx glass particle or silica composition its inorganic glass particles of shared percentage by weight more than 80%, it is described remaining One liquid pool is also referred to as terminal liquid pool, is filled with some high hydroscopic resin particles in the terminal liquid pool, its opening end of the terminal liquid pool Covered by breathable microporous film.

Arrow in legend indicate the micro-fluidic chip its in actual motion, by pressure at two ends difference drive, its try The flow direction of sample liquid stream.

The miniature ultrasonic for being depicted without attaching installing in Fig. 1 in the hinge-type fixture 15 and one hinge changes Can device 19 and higher-order of oscillation electric signal transmission cable 18；Also, the higher-order of oscillation telecommunication is depicted without in Fig. 1 and Fig. 2 The associate member such as number generator and multiple tracks electrochemical workstation.

Involved hinge-type fixture 15 can be carried out simply cutting using commercially available hinge, changed a social system；The miniature ultrasonic Transducer 19 is commercially available；Commercially available miniature ultrasonic transducer units are various in style, can select to use as needed；This is miniature super Acoustic wave transducer 19 can also customize to ultrasonic transducer specialized factory.

Involved higher-order of oscillation electric signal transmission cable 18 is commercially available；Can also be special to ultrasonic transducer producer or cable Industry producer customizes.

Involved higher-order of oscillation electric signal generator in the market has the product close to needs commercially available；It can also determine to relevant manufacturers System.

Each working electrode in this example structure and can be respectively via each special electricity to electrode and reference electrode Cable or say is being got lines crossed respectively with the corresponding cable interface of the multiple tracks electrochemical workstation as annex or saying interface connection of getting lines crossed.

Claims (10)

1. substrate material is PDMS cholera diagnosis multi-channel chip device, the structure of the device includes multichannel micro-fluidic core Piece, the structure of the micro-fluidic chip include being bonded to each other the substrate and cover plate of installing together, and the substrate and cover plate are plate The conduit knot via mould pressing process or etching technics formation is contained in shape thing or tablet, that face towards the cover plate of the substrate Structure, the substrate also containing be connected with the channel structure and pierce the substrate via mould pressing process, etching technics or simply beat The window structure that hole technique is formed, it is bonded to each other the substrate being installed together and has been built into jointly with the cover plate and contain pipeline knot The micro-fluidic chip of structure and the liquid pool structure being attached thereto, the locations of structures of the pipeline are located at the substrate and mutually pasted with the cover plate The interface zone of conjunction, its side of the window is blocked by the cover plate and opposite side opens, and the locations of structures of the window is exactly the liquid The locations of structures in pond, the quantity of the liquid pool is three, and its locations of structures of two liquid pools therein is located at the micro-fluidic chip Sample introduction end, its locations of structures of a remaining liquid pool are located at liquid flowing in its chip when the actual sample introduction of the micro-fluidic chip is tested Terminal, the terminal is located remotely from each other with the sample introduction end, and one end of the pipeline is via being similarly positioned in the interface zone being bonded to each other Manifold shape turnout respectively with the Liang Ge liquid pools UNICOM positioned at sample introduction end, the other end of the pipeline and be located at the micro-fluidic chip The terminal a remaining liquid pool UNICOM, and, be sequentially respectively installed in the work on diverse location in the pipeline Electrode and to electrode and reference electrode, the working electrode is by conductive electrode and is attached on the conductive electrode The gold size sensitive membrane for having embedded cholera specific antibody is formed, and the construction of the pipeline is in parallel construction, and described is in parallel construction Pipeline is made up of four lateral parallel connections, and the quantity of the working electrode is four, the installation position of four working electrodes Respectively in four laterals, and, the specificity in its top layer gold size sensitivity membrane structure of four working electrodes Antibody is the four kinds of cholera antibody materials that can be specifically bound to cholera antigen respectively, and four kinds of antibody materials are cholera respectively TP0821 antibody and cholera TP0319 antibody and cholera TP0624 antibody and cholera O139 mycoprotein antibody, the work Making electrode, its material is gold material or thermally decomposes conducting polymer material, and sheet or silk is presented in its pattern of the working electrode Shape, it is characterised in that its material of the substrate is dimethyl silicone polymer material, and its surface of the substrate is the surface of primary form, The surface of the primary form its be intended to refer to not by the material of any surface chemical modification or any surface chemical modification The surface of the primary form of matter, the structure of the device also include hinge-type fixture, and hinge-type fixture its appearance profile likeness in form is closed Page, the hinge-type fixture by two hinges being mutually hinged and a fastening screw through two hinges and One matches with the fastening screw and is used for the nut structure of fastening and hand break loose manually with what the fastening screw connected together Into two hinges of the hinge-type fixture are respectively mutually drawn close with its tip and clamp the micro-fluidic chip, and the tip is positioned at Fixed installing is attached in the locations of structures of the neighbouring terminal of the micro-fluidic chip, in a hinge at least in There are miniature ultrasonic transducer units, and, higher-order of oscillation electric signal transmission cable, one end of the higher-order of oscillation electric signal transmission cable Linked together with the miniature ultrasonic transducer units；The hinge-type fixture provides a function of facilitating the device to disassemble；Should Its major function of miniature ultrasonic transducer units is in the test of micro-fluidic chip actual sample introduction, utilizes the sample introduction end and described In the distance between terminal and the miniature ultrasonic transducer units installation position difference and its ultrasonic intensity experienced Difference between difference, its interfacial tension of sample introduction end described in induced synthesis and the terminal its interfacial tension, the micro-fluidic chip Interfacial tension difference between the both ends can form pressure gap between the both ends of the micro-fluidic chip, the pressure gap meeting Sample solution is driven to the end flow；It is soft and have the substrate of the dimethyl silicone polymer material of elasticity its function and include With its property to the strong absorption of ultrasonic wave, ultrasonic wave is absorbed strongly, and thereby in the micro-fluidic chip, the terminal arrives The rapid decrement of ultrasonic intensity is realized within limited short distance between the sample introduction end；And many silica Grain, many silica dioxide granules are filled in the pipeline, and its tube chamber of the pipeline is by many silica dioxide granules Filled up, for its particle size range of the silica dioxide granule between 10 microns and 200 microns, the silica dioxide granule is titanium dioxide Its unorganic glass of shared percentage by weight more than 80% of silicon crystalline particles, silica glass granule or silica composition Particle, a remaining liquid pool are also referred to as terminal liquid pool, and some high hydroscopic resin particles, the end are filled with the terminal liquid pool Liquid pool its opening end in end is covered by breathable microporous film.

2. substrate material according to claim 1 is PDMS cholera diagnosis multi-channel chip device, it is characterised in that The pipeline and the lateral and the manifold shape turnout are capillary channel.

3. substrate material according to claim 1 is PDMS cholera diagnosis multi-channel chip device, it is characterised in that The thermal decomposition conducting polymer is the conductive material formed by polyimides or polyacrylonitrile after anoxybiotic is heat-treated.

4. substrate material according to claim 1 is PDMS cholera diagnosis multi-channel chip device, it is characterised in that The width or diameter of the working electrode between 0.1 micron to 2000 microns, and, the length of the working electrode is 1 Micron is between 15000 microns.

5. substrate material according to claim 1 is PDMS cholera diagnosis multi-channel chip device, it is characterised in that The thickness of the gold size sensitive membrane is between 10 nanometers and 200 nanometers.

6. substrate material according to claim 1 is PDMS cholera diagnosis multi-channel chip device, it is characterised in that The cover plate its material in structure is dimethyl silicone polymer material.

7. substrate material according to claim 1 is PDMS cholera diagnosis multi-channel chip device, it is characterised in that Positioned at the sample introduction end of the micro-fluidic chip two liquid pools its with positioned at the micro-fluidic chip terminal this remaining one Air line distance between individual liquid pool is between 3 centimetres and 7 centimetres；Described its thickness of cover plate and substrate in structure between Between 1.0 millimeters and 5.0 millimeters.

8. substrate material according to claim 1 is PDMS cholera diagnosis multi-channel chip device, it is characterised in that For its particle size range of the silica dioxide granule between 100 microns and 200 microns, its inside diameter ranges of the pipeline are micro- between 500 Between rice and 1000 microns.

9. substrate material according to claim 1 is PDMS cholera diagnosis multi-channel chip device, it is characterised in that The structure of the device also includes higher-order of oscillation electric signal generator, and its other end of the higher-order of oscillation electric signal transmission cable is with being somebody's turn to do Higher-order of oscillation electric signal generator connects.

10. substrate material according to claim 1 is PDMS cholera diagnosis multi-channel chip device, its feature exists In its specified ultrasonic wave transmission power of the miniature ultrasonic transducer units is between 5 milliwatts and 9000 milliwatts, the miniature ultrasonic The frequency of its ultrasonic wave operationally launched of transducer is between 100KHz and 12MHz.