CN113477283A - Method for driving fluid to move by non-plasma metal photoinduced ultrasound and capturing device - Google Patents
Method for driving fluid to move by non-plasma metal photoinduced ultrasound and capturing device Download PDFInfo
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- CN113477283A CN113477283A CN202110676166.5A CN202110676166A CN113477283A CN 113477283 A CN113477283 A CN 113477283A CN 202110676166 A CN202110676166 A CN 202110676166A CN 113477283 A CN113477283 A CN 113477283A
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- 239000012530 fluid Substances 0.000 title claims abstract description 38
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 25
- 239000002184 metal Substances 0.000 title claims abstract description 25
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000002604 ultrasonography Methods 0.000 title claims abstract description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 46
- 239000000758 substrate Substances 0.000 claims abstract description 26
- 229910052742 iron Inorganic materials 0.000 claims abstract description 24
- 230000000694 effects Effects 0.000 claims abstract description 14
- 229910052721 tungsten Inorganic materials 0.000 claims abstract description 10
- 239000010937 tungsten Substances 0.000 claims abstract description 9
- 230000033001 locomotion Effects 0.000 claims description 22
- 239000011521 glass Substances 0.000 claims description 8
- CPBQJMYROZQQJC-UHFFFAOYSA-N helium neon Chemical compound [He].[Ne] CPBQJMYROZQQJC-UHFFFAOYSA-N 0.000 claims description 5
- 229910021645 metal ion Inorganic materials 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
- -1 tungsten ions Chemical class 0.000 claims description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 abstract description 18
- 239000010931 gold Substances 0.000 abstract description 18
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 abstract description 17
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 abstract description 7
- 239000007788 liquid Substances 0.000 abstract description 6
- 150000002739 metals Chemical class 0.000 abstract description 4
- 238000010895 photoacoustic effect Methods 0.000 abstract description 4
- 238000002844 melting Methods 0.000 abstract description 3
- 230000008018 melting Effects 0.000 abstract description 3
- 238000000608 laser ablation Methods 0.000 abstract 1
- 239000010453 quartz Substances 0.000 description 12
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 12
- 238000005516 engineering process Methods 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 238000002835 absorbance Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000002045 lasting effect Effects 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 2
- 230000001052 transient effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001962 electrophoresis Methods 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002105 nanoparticle Substances 0.000 description 1
- 229910000510 noble metal Inorganic materials 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000002198 surface plasmon resonance spectroscopy Methods 0.000 description 1
- 238000000411 transmission spectrum Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 238000002371 ultraviolet--visible spectrum Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/50—Containers for the purpose of retaining a material to be analysed, e.g. test tubes
- B01L3/502—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures
- B01L3/5027—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip
- B01L3/50273—Containers for the purpose of retaining a material to be analysed, e.g. test tubes with fluid transport, e.g. in multi-compartment structures by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip characterised by the means or forces applied to move the fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Dispersion Chemistry (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Hematology (AREA)
- Clinical Laboratory Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a method for driving fluid to move by non-plasma effect metal photoinduced ultrasound and a capturing device, wherein pulse laser is focused and then irradiates a substrate injected with non-plasma metal, the substrate absorbs the energy of the pulse laser, and the generated ultrasonic wave further drives the fluid to move macroscopically due to the fact that the photoacoustic effect generates the ultrasonic wave, and the quantity level of decimeter per second can be reached under 120 mW. Compared with the method for driving liquid by photoinduced ultrasound through gold, the laser flow control method adopted by the invention adopts lower-cost metals such as iron, tungsten and the like, and related devices have wider application in the biological aspect due to the biocompatibility of iron; in addition, due to the high melting point of the two metals, longer fluid flow times are exhibited after laser ablation than for gold implanted devices.
Description
Technical Field
The invention belongs to the technical field of laser-controlled fluid motion, and particularly relates to a method for driving fluid motion by non-plasma metal photoinduced ultrasound and a capturing device.
Background
For fluidic applications, such as microfluidic technologies, chemical microreactors and bioscience systems, methods of manipulating or driving liquids are important and fundamental requirements. Compared with the traditional method, the laser can achieve unique excellent performances such as higher strength and the like on a micro scale due to excellent monochromaticity and good directional collimation, and has unique advantages in the aspect of controlling liquid flow. The optical technology for fluid control has many excellent characteristics, such as no energy loss, no contact, no pollution, easy precise control in time and space and low manufacturing cost. However, most of the methods, such as the optically controlled fluid technology using light radiation pressure, or the thermo-capillary, electrophoresis and electro-optical wetting effects, have the problem that the flow velocity of the liquid driven by the optically controlled fluid technology is weak. The recently discovered photo-induced ultrasonic driving macroscopic fluid motion effect overcomes the limitation by combining the photoacoustic effect with the ultrasonic driving flow, and then, gold is injected into a quartz substrate through an ion injection technology to realize the real-time driving of a laser convection field, and any point on the quartz can be used as an emission point to generate jet flow, so that the technology has wider application prospect in the aspect of microfluidics, but still has a plurality of unsolved problems.
Firstly, gold is used as a noble metal, so that the cost is high, and the popularization and application aspects are limited; secondly, gold is not biocompatible, which limits the applications in living beings, such as painless injection; finally, although gold-implanted devices provide faster fluid driving speeds, their lifetime is very short and do not provide long-term flow fields.
Disclosure of Invention
The invention aims to provide a method for driving fluid to move by non-plasma metal photoinduced ultrasound and a capturing device, which can realize the durable service life of a flow field and have the characteristics of repeatability, wide application range, large application potential, higher flowing speed, long lasting time and the like.
In order to achieve the above purpose, the present invention provides a method for driving fluid movement by non-plasma metal photoinduced ultrasound, which comprises the following steps: the laser is focused and then irradiates a substrate injected with non-plasma metal ions, and the substrate absorbs the energy of the pulse laser, generates ultrasonic waves and drives fluid to perform macroscopic motion; wherein the non-plasma metal ions are iron or tungsten ions.
The beneficial effect who adopts above-mentioned scheme is: the photoacoustic effect occurs before the acoustic control fluid and determines the strength of the flow, and since the photoacoustic effect is a photothermal effect, a photoacoustic wave is generated to drive the fluid as long as the laser pulse can be absorbed and converted into heat. The ultrasonic waves can be generated by the thermal expansion of metal ions, the thermal expansion of surrounding water or transient water vapor around nanoparticles, when the temperature of a laser point is increased to be higher than a boiling temperature, the transient water vapor is generated, and higher local temperature caused by the thermal expansion of the water vapor can generate more steam and further generate stronger ultrasonic waves, so that the fluid can perform macroscopic motion under the condition of lasting flow field duration. Under the same control of irradiation conditions and absorbance, iron and tungsten have higher melting points, so that more lasting flow field duration can be provided under the same irradiation conditions, and lasting flow field service life is realized.
Further, the laser light was first emitted by a pulse laser having a wavelength of 532nm, a frequency of 1000Hz, and a pulse width of 150 ns.
Further, the focusing process is as follows: the laser was focused through a convex lens with a focal length of 5 cm.
The beneficial effect who adopts above-mentioned scheme is: the laser was focused on the substrate through a convex lens with a focal length of 5cm, and the liquid flow was observed without pretreatment time.
Further, the frequency of the pulse laser is 7.3-120 mW.
Further, the velocity of the fluid movement is directly proportional to the concentration of the injected metal.
The beneficial effect who adopts above-mentioned scheme is: by increasing the concentration of the injected metal, the absorbance of the substrate can be increased, and the flow rate can be increased effectively.
The device for capturing the movement of the non-plasma effect metal photoinduced ultrasonic driving fluid comprises a glass water pool, a substrate and a helium-neon laser, wherein the substrate and the helium-neon laser are positioned on two sides of the glass water pool, fluorescent particles are fully loaded in the glass water pool, and a camera is arranged outside the glass water pool.
Further, the wavelength of the he-ne laser is 632.8 nm.
The beneficial effect who adopts above-mentioned scheme is: 532nm pulsed laser is focused through a 5cm convex lens onto a substrate for non-plasma metal implantation, the substrate is placed in a glass water bath filled with fluorescent particles, a 632.8nm helium-neon laser is placed on the other side for illuminating the field of view, and after being elongated by a cylindrical lens, the flowing video is captured laterally by a CCD camera.
In summary, the invention has the following advantages:
1. the used experimental device is simple and easy to operate, the design structure cost is low, and the application is convenient; the threshold of power required for driving the fluid is low, and fluid motion can be realized at low power; under higher power, the maximum speed of decimeters per second can be reached;
2. the invention uses non-plasma metal, breaks through the metal which is limited to gold and generates the surface plasma resonance effect, and the selected substrate can generate the phenomenon of photoinduced ultrasonic driving fluid as long as the substrate has high enough absorbance, thereby providing wider selection for the application in the future;
3. the driving speed of the invention is greatly improved by increasing the concentration of the injected metal, which provides an experimental basis for the high-speed application of the invention;
4. the invention uses iron and tungsten as ion implantation metal, has low cost, strong continuous stability of flow field, wide application range and huge application potential, such as application in biology;
5. by the method provided by the invention, under the high-power pulse laser of 120mW, the maximum speed of the liquid driven by the laser flow control device injected by iron can reach 13.6 cm/s.
Drawings
FIG. 1 is a schematic view of an experimental apparatus according to the present invention;
FIG. 2 is a power threshold of a fluid produced by irradiating an iron-implanted quartz substrate with a pulsed laser at 532nm, a frequency of 1000Hz, and a pulse width of 150 ns;
FIG. 3 is a macroscopic view of an iron and gold injection sample of the same concentration gradient, uv-vis spectrum compared to maximum velocity at 30 mW;
FIG. 4 is a comparison of the continuous stability of the three metal flow fields of Fe, W and Au at the same power and the same initial speed;
figure 5 is a graphical representation of the maximum speed that can be achieved for an iron-infused quartz sample at 120 mW.
Detailed Description
The principles and features of this invention are described below in conjunction with embodiments, which are included to explain the invention and not to limit the scope of the invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
Example 1
As shown in fig. 1, the present embodiment provides a method for driving fluid movement by non-plasma metal photoinduced ultrasound, which includes the following steps:
(1) injecting iron ions into the quartz substrate to ensure that the transmissivity of the quartz substrate is 51%;
(2) adjusting the wavelength of a pulse laser to be 532nm, the repetition frequency to be 1000Hz and the pulse width to be 150 ns;
(3) focusing the adjusted pulse laser on the surface of the quartz substrate through a convex lens with the focal length of 5cm, filling fluorescent particles in the water pool for responding to the irradiation of a 632.8nm helium-neon laser at the other end to emit light, and placing a CCD camera on the side face of the water pool to realize the function of capturing and shooting a view field.
As shown in fig. 2, when the laser frequency is slowly increased to 7.3mW under the irradiation of the laser pulser, the CCD camera images a weak fluid motion, wherein the white dotted line in fig. 2 is the position of the substrate and the red dot is the fluorescent particles in the water pool. As shown in FIG. 5, under the irradiation of the laser pulser, when the laser frequency is increased to 120mW, the maximum speed that the iron-implanted quartz substrate can reach is 13.6cm/s, which breaks through the magnitude increase of centimeter per second in the prior art.
Test example 1
This test example was conducted in the same photo-induced ultrasonic-driven fluid motion test as the iron ion-implanted substrate, in which the iron-implanted sample was black in appearance and the gold was red in appearance, as shown in fig. 3(a), and the two samples were rapidly distinguished in this way. As shown in FIG. b, 5X 10 was selected16/cm2And 1X 1017/cm2Transmittance measurements were made at two concentrations of iron and gold. The gold-implanted quartz substrate showed a significant transmission drop in the short wavelength band due to the surface plasmon resonance effect in the vicinity of 532 nm. Since gold has a higher absorption rate than iron, the gold-implanted quartz slides produce stronger jets, as shown in fig. 3(c) - (f). However, in fig. 3(c) - (f), the sample velocity for gold injection increases only slightly when the two metal concentrations are doubled, while the flow field velocity increases more than twice for the iron injected sample.
Test example 2
As shown in fig. 4, the present test example examined the relationship between the ion concentration and the speed of fluid movement by comparing the efficiencies of the driving fluids of different metals, including a comparative illustration of iron and gold and iron and tungsten. Fig. 4(a) and 4(b) show the transmission spectra of four injected samples, with the absorption of the iron and gold control being about 50% and the absorption of the iron and tungsten control being about 24%. Fig. 4(c) - (d) record velocity profiles of four samples over 30 minutes. It can be seen that gold is much faster than iron in the laser stream, but iron is more stable than gold, at the same light absorption and laser power. A quartz substrate implanted with iron requires a higher laser power to produce the same initial velocity flow field than a quartz substrate implanted with gold, but at this higher power the stability is higher than gold. Between iron and tungsten, iron is more rapid, but tungsten is somewhat more stable than iron. This is proportional to the melting points of the three metals.
While the present invention has been described in detail with reference to the illustrated embodiments, it should not be construed as limited to the scope of the present patent. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.
Claims (8)
1. A method for driving fluid motion by photoinduced ultrasound of non-plasma effect metal is characterized by comprising the following steps: the laser is focused and then irradiates a substrate injected with non-plasma metal ions, and the substrate absorbs the energy of the pulse laser, generates ultrasonic waves and drives fluid to perform macroscopic motion; wherein the non-plasma metal ions are iron or tungsten ions.
2. The method of claim 1, wherein the non-plasma effect metallic photo-induced ultrasound driven fluid motion comprises: the laser is first emitted by a pulsed laser having a wavelength of 532nm, a frequency of 1000Hz, and a pulse width of 150 ns.
3. The method of non-plasma effect metallic photoinduced ultrasonic driven fluid motion according to claim 1, wherein the focusing process is as follows: the laser was focused through a convex lens with a focal length of 5 cm.
4. The method of claim 1, wherein the non-plasma effect metallic photo-induced ultrasound driven fluid motion comprises: the frequency of the pulse laser is 7.3-120 mW.
5. The method of claim 1, wherein the non-plasma effect metallic photo-induced ultrasound driven fluid motion comprises: the velocity of the fluid movement is directly proportional to the concentration of the injected metal.
6. A device for capturing non-plasma effect metallic photo-induced ultrasound driven fluid motion as claimed in any one of claims 1 to 5.
7. The apparatus of claim 6, comprising a glass tank filled with phosphor particles and a helium-neon laser and a substrate on both sides of the glass tank, wherein a camera is disposed outside the glass tank.
8. The apparatus for trapping motion of a non-plasma effect metal photo-induced ultrasound driven fluid of claim 7, wherein the wavelength of the he-ne laser is 632.8 nm.
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Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108252891A (en) * | 2018-03-05 | 2018-07-06 | 河南工程学院 | A kind of Laser Driven Macro Flow device and method based on optical fiber |
CN110193319A (en) * | 2019-06-03 | 2019-09-03 | 长沙理工大学 | A kind of nano-fluid anti-agglomeration device based on optoacoustic effect |
CN112683737A (en) * | 2020-12-25 | 2021-04-20 | 电子科技大学 | Method for generating marangoni effect |
CN112718030A (en) * | 2021-01-25 | 2021-04-30 | 宁夏医科大学总医院 | Blood separation device based on acoustic fluid mechanics |
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Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
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CN108252891A (en) * | 2018-03-05 | 2018-07-06 | 河南工程学院 | A kind of Laser Driven Macro Flow device and method based on optical fiber |
CN110193319A (en) * | 2019-06-03 | 2019-09-03 | 长沙理工大学 | A kind of nano-fluid anti-agglomeration device based on optoacoustic effect |
CN112683737A (en) * | 2020-12-25 | 2021-04-20 | 电子科技大学 | Method for generating marangoni effect |
CN112718030A (en) * | 2021-01-25 | 2021-04-30 | 宁夏医科大学总医院 | Blood separation device based on acoustic fluid mechanics |
Non-Patent Citations (1)
Title |
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WANG ET AL.: "Laser streaming: Turning a laser beam into a flow of liquid", 《SCIENCE ADVANCES》 * |
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