EP2482983A1 - Circuit microfluidique - Google Patents
Circuit microfluidiqueInfo
- Publication number
- EP2482983A1 EP2482983A1 EP10778686A EP10778686A EP2482983A1 EP 2482983 A1 EP2482983 A1 EP 2482983A1 EP 10778686 A EP10778686 A EP 10778686A EP 10778686 A EP10778686 A EP 10778686A EP 2482983 A1 EP2482983 A1 EP 2482983A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drops
- microchannel
- channel
- bubbles
- fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
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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
- B01L3/502769—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 multiphase flow arrangements
- B01L3/502784—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 multiphase flow arrangements specially adapted for droplet or plug flow, e.g. digital microfluidics
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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
- B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
- B01L2200/02—Adapting objects or devices to another
- B01L2200/026—Fluid interfacing between devices or objects, e.g. connectors, inlet details
- B01L2200/027—Fluid interfacing between devices or objects, e.g. connectors, inlet details for microfluidic devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
- B01L2200/06—Fluid handling related problems
- B01L2200/0647—Handling flowable solids, e.g. microscopic beads, cells, particles
- B01L2200/0652—Sorting or classification of particles or molecules
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/08—Geometry, shape and general structure
- B01L2300/0861—Configuration of multiple channels and/or chambers in a single devices
- B01L2300/0864—Configuration of multiple channels and/or chambers in a single devices comprising only one inlet and multiple receiving wells, e.g. for separation, splitting
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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
- B01L2300/00—Additional constructional details
- B01L2300/08—Geometry, shape and general structure
- B01L2300/089—Virtual walls for guiding liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2400/00—Moving or stopping fluids
- B01L2400/04—Moving fluids with specific forces or mechanical means
- B01L2400/0403—Moving fluids with specific forces or mechanical means specific forces
- B01L2400/0406—Moving fluids with specific forces or mechanical means specific forces capillary forces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2400/00—Moving or stopping fluids
- B01L2400/08—Regulating or influencing the flow resistance
- B01L2400/084—Passive control of flow resistance
- B01L2400/086—Passive control of flow resistance using baffles or other fixed flow obstructions
Definitions
- the present invention relates to a microfluidic circuit comprising at least one microchannel in which flows a first fluid for the displacement of drops or bubbles of at least one second fluid.
- a microfluidic circuit is disclosed in WO 2006/018490 in the name of the applicants. This is made of a suitable material such as for example PDMS (poly-dimethylsiloxane) comprising microchannels typically having a width of approximately ⁇ ⁇ and a depth of approximately ⁇ , in which very low flow rates can be passed.
- a fluid such as air, water, oil, reagents, etc.
- a laser beam whose wavelength is not absorbed by the constituent material of the circuit, is focused on the interface of a first fluid flowing in a microchannel and a second fluid present at least locally in this microchannel, to force or stop the flow of the first fluid in the microchannel, to break it into drops, to mix with the second fluid, etc., the focusing of the laser beam on the interface of the fluids creating a temperature gradient along of this interface and causing fluid movement by thermocapillary convection.
- this technology has been used to treat drops in a microfluidic circuit comprising at least one microchannel traversed by the drops.
- the method used consists of causing a laser beam to act on the interface of these drops in a carrier fluid or on the interface of the drops in contact, to form droplets, to form nano-drops from a drop of larger size or to merge drops in contact and cause reactions between the fluids contained in these drops.
- the subject of the invention is another method for treating drops in a microfluidic circuit, which may optionally be used in combination with the prior treatment techniques described above.
- the invention proposes a microfluidic circuit comprising at least one flow microchannel of a first fluid carrying drops or bubbles of at least one second fluid, characterized in that the height of the microchannel is sized to crush the drops or the bubbles during their displacement, and in that the microchannel comprises at least one channel, extending at least partly in the direction of flow of the first fluid or a trapping zone of drops or bubbles, this zone or channel having a height greater than that of the microchannel, so that at least some of the drops or bubbles of the second fluid in the microchannel are attracted and guided in the channel or in the trapping area.
- the surface energy of the drop is even lower than its external surface is small.
- the minimum energy is therefore obtained by a drop of spherical shape and increases continuously as and when the drop away from this form.
- the surface energy can be calculated for a drop of known volume for any position in the microchannel. Thus, we can predict whether or not the drop will be guided by a given channel by comparing the forces involved.
- a drop placed in the microchannel and crushed has a large external surface. This drop naturally seeks to reduce its external surface, which causes it to migrate to the channel of greater height when it arrives at a branch between the microchannel and the channel.
- the drops are thus attracted to the channel and are moved along it by the first fluid.
- the direction of the channel is not parallel to the direction of the flow of the first fluid (carrier fluid) in the microchannel, the drop remains trapped in the channel as the viscous driving force, in the normal direction at the local direction of the channel and exerted by the first fluid on the drop, is less than that necessary to deform the drop and return to its crushed form.
- This phenomenon is thus influenced by several parameters, such as the viscosity of the carrier fluid and the fluid of the drops, the size of the droplet, the speed of the carrier fluid, the interfacial tension, the geometry of the channel, the thickness of the microchannel, etc.
- the microchannel is delimited by two parallel walls, and the channel is formed by a groove of at least one of the walls of the microchannel, or between two parallel ribs of one of the walls of the microchannel.
- bubbles or drops of at least two different types are carried by the first fluid and the channel is a means of separating or sorting bubbles or drops, only those of a first type being guided in the channel.
- the drops that are attracted to the channel are those for which the viscous force exerted by the first fluid on each drop is less than that required to deform the drop and return to its crushed form.
- the drops flowing in the direction of the carrier fluid without following the channel are those for which the viscous force exerted by the first fluid on the drop is greater than that required to deform the drop and restore its shape. crushed.
- the bubbles or the drops of different types have different sizes, viscosities, or surface tensions, which makes it possible to separate them from each other.
- the channel comprises at least two successive portions of different height and / or width, a portion of greater width and / or height being followed by a portion of smaller width and / or height, in the direction of flow of the first fluid.
- This type of channel makes it easy to separate two types of bubbles or drops. For example, bubbles with high viscosity or large size will flow only along the high channel portion of the channel before being driven out of the channel by the carrier fluid, while bubbles to lower Viscosity or smaller size will flow not only along the high-end portion of the channel but also along its low-rise portion.
- the circuit comprises channels of different width and / or different inclination with respect to the flow of the first fluid, which also makes it possible to discriminate different types of bubbles or drops.
- the circuit comprises drop trapping zones or bubbles, formed by an enlargement of the passage section of the drops or bubbles in the microchannel or in a channel mentioned above, or by a local modification of the surface energy. microchannel and / or channel.
- the circuit may include trapping zones in the microchannel, even in the absence of the channel. The drops or bubbles carried by the carrier fluid are then trapped in the trapping zones placed on their path.
- these trapping zones may be smaller than the size of the drops or bubbles to be trapped.
- These trapping zones can be adapted to a single type of bubble and / or can contain only a defined number of bubbles, for example one or two bubbles.
- the trapping zones make it possible to immobilize one or more drops, which makes it possible, for example, to examine them with the aid of a microscope and / or to follow the course of a reaction within an area during a period of time. important time.
- At least some of the trapping areas may be independent of one another.
- At least some of the trapping zones are connected in series or in parallel by the microchannel or by the aforementioned channels.
- the trap can be made so that the presence of a drop in it will force the following drops to continue their journey, to fill traps downstream.
- a trapped droplet is stationary but its contents continue to be set in motion by the flow of the carrier fluid. In this way, the content of the drop can be mixed even when it is stationary.
- Such a phenomenon can play an important role in the field of biological incubation or for setting up a chemical reaction.
- the jump of one or more drops from one trapping zone to another may cause, by cascade effect, the movement of the trapped drops in the zones situated in downstream.
- At least one channel comprises means for slowing down or accelerating the bubbles or drops present in the channel, these slowing or acceleration means being formed by variations in width or height of the channel, or by rails or ribs of the walls of the corresponding microchannel, formed along the desired slowdown or acceleration zones.
- the circuit comprises means for forming parallel trains of drops or bubbles of different nature in a microchannel comprising parallel means for introducing drops or bubbles of different types into the microchannel, and channels formed in this microchannel from the introduction means for guiding the drops or bubbles exiting from each introduction means to a predetermined zone of the microchannel.
- Each type of drop is thus brought to a predefined location of the microchannel. It is then possible to have series of drops of known nature at different levels of the microchannel.
- Figure 1 is a schematic view showing the section of the microchannel
- Figures 2 and 3 are views corresponding to Figure 1, showing two other embodiments of the invention
- Figure 4 shows, in top view, a microchannel equipped with a channel
- FIG. 5 represents, in top view, a microchannel equipped with a network of channels;
- Figures 6 to 9 are top views of a microchannel according to different embodiments of the invention for separating drops of different natures;
- FIG. 10 is a view from above of a microchannel equipped with a channel including means for slowing drops;
- FIG. 11 is a view from above of a microchannel equipped with a channel including means for accelerating the drops;
- FIG. 12 is a top view of a microchannel equipped with a main channel and associated channels for slowing the drops of the main channel;
- FIG. 13 is a top view of a microchannel equipped with a bubble trapping zone, in the absence of a channel;
- Figures 14 and 15 are top views of a channel equipped with bubble trapping areas
- Figure 16 is a top view of a network of channels with obstacles
- Figure 17 is a top view of a network of channels having wetting zones
- Figure 18 is a top view of channels forming microreactors
- FIG. 19 is a top view of a microchannel comprising a channel equipped with trapping zones arranged in series;
- Figure 20 is a top view of a matrix network of trapping areas.
- FIG. 21 shows a microchannel comprising means for feeding parallel trains of drops of different nature.
- FIG. 1 schematically represents a first embodiment of a microcircuit 1 according to the invention.
- the microcircuit 1 is formed in a plate of a suitable material such as for example PDMS (poly-dimethylsiloxane) using a common technique of flexible lithography, as is known from the aforementioned prior art.
- a suitable material such as for example PDMS (poly-dimethylsiloxane)
- One or more microchannels 2 may be formed on the surface of the plate, on which is glued a glass microscope slide, for example.
- the microchannel 2 has a rectangular section whose width L is defined by its horizontal transverse dimension, that is to say in the plane of the microcircuit 1, and whose height h is defined. by its dimension in the vertical direction, that is to say in a direction perpendicular to the plane of the microcircuit 1.
- a groove 3 of rectangular or square section is formed in one of the two horizontal walls 4 which delimit the microchannel 2.
- a second groove could be formed in the opposite horizontal wall, opposite the first 4.
- the groove 3 thus forms a channel of larger section than the rest of the microchannel 2.
- the second fluid may be in the form of drops or bubbles, without changing the operation of the invention.
- Drops flowing in the narrow zone of the microchannel are crushed. When they encounter a channel 3, they take a less crushed form, for example a spherical or quasi-spherical shape, requiring less surface energy than the crushed form. It should be noted that the drops can remain crushed while being guided by the channel.
- the decisive criterion is that the surface energy of the drop in the channel is smaller than that outside the channel, the sphere corresponding to the minimum of this energy.
- Drops may be larger or smaller than the channel
- FIG. 2 illustrates an alternative embodiment of the invention in which the groove defining the channel 3 has a concave or rounded shape.
- FIG. 3 Another variant embodiment is shown in FIG. 3, in which one of the horizontal walls 4 is provided with two parallel ribs 6, spaced apart from one another, directed towards the inside of the microchannel 2 and defining between them a channel 3.
- the crushed drops between the apex of the ribs 6 and the opposite wall 8 are directed either to the channel 3 or to the other zones of the microchannel 2 situated on either side of the ribs 6.
- the drops 5 can return to a spherical or quasi-spherical shape and therefore a lower surface energy.
- the ribs form barriers to separate some drops from others.
- FIG. 4 represents, in plan view, the shape of a channel 3.
- the channel 3 comprises at least one part 9 extending along the axis A of the microchannel and therefore along the axis F of FIG. flow of the carrier fluid, at least a portion 10 extending obliquely relative to the aforementioned axis A, and / or at least a portion 1 1 of sinusoidal shape.
- the trajectory of the drops 5 flowing along the channel 3 has a component along the direction of flow of the carrier fluid, so that the drops 5 are always driven by the carrier fluid from upstream to downstream of channel 3 and microchannel 2.
- the travel time of the drops 5 in the microchannel 2 is greater. In this way, the contents of the drops can be observed with a microscope for a longer period, without the need to change the observation area over time.
- FIG. 5 illustrates a network of channels comprising a central channel 12 extending in the direction of the microchannel 2, on either side of which extend several auxiliary channels 13.
- Each auxiliary channel 13 extends from the central channel 12 and opens up again in the latter, like bypass channels.
- the drops 5 contain, for example, water and the carrier fluid is paraffin oil, the width of the microchannel 2 is 3 mm, that of the channels 12, 13 is 70 ⁇ . , the heights of the microchannel and channels are respectively 50 ⁇ and 35 ⁇ , and the drops 5 flow from the left to the right in the direction of the arrow F.
- FIG. 6 represents a microchannel 2 in which a first fluid forming a carrier fluid circulates for drops of a first and a second type.
- the drops of the first type 14 have a larger size than the drops of the second type 15.
- the microchannel 2 is equipped with a channel 3 extending obliquely from upstream to downstream relative to the direction of circulation of the carrier fluid, represented by the arrow F.
- the height and / or the width of the channel 3 are adjusted so that the largest drops 14 are carried with the carrier fluid in the direction of the arrow F and the smaller drops 15 are drawn into the channel 3, then progress along it, the upstream downstream, being driven by the carrier fluid.
- the downstream end 16 of the channel 3 is provided with a reduction of its height or of its width so that the viscous force exerted by the carrier fluid is greater than that required to crush the drops 15, so that the carrier fluid leads them back into the microchannel 2.
- the drops 14 and 15 thus flow downstream of the channel 3, respectively along two axes B and C parallel to the flow of the carrier fluid and spaced apart from each other.
- Such a microchannel thus makes it possible to sort two types of drops of different nature.
- FIG. 7 illustrates a microchannel 2 similar to that of FIG. 6, in which the drops of the first type 14 are relatively very viscous and the drops of the second type are relatively low viscosity.
- the height and / or the width of the channel 3 are adjusted so that the more viscous drops 14 are carried along with the carrier fluid and only the less viscous drops 15 are attracted into the channel and then progress along it. , from upstream to downstream, being driven by the carrier fluid and out of the channel 3 at the downstream end thereof.
- Such a microchannel 2 can also be used to sort drops having different surface tensions.
- FIG. 8 represents a microchannel of the type of those of FIGS. 6 and 7, in which the channel presents successively, from upstream to downstream, zones of decreasing height and / or width 17 to 20.
- Each zone is dimensioned so that it can discriminate a particular type of drop.
- the carrier fluid causes four types of drops of different sizes or viscosities opposite the first zone 17, that is to say the widest and / or the deepest zone.
- the drops of the first type 21, that is to say the largest or most viscous are driven through this area 17 by the carrier fluid, the trajectory of these drops 21 being almost unaffected by the presence of the channel 3.
- the second zone 18 is dimensioned so that the drops of the second type 22 can not penetrate. These drops 22 are thus extracted from the channel 3 and then circulate in the microchannel 2, along an axis parallel to the flow of the carrier fluid and spaced from their original circulation axis.
- the other zones 19 and 20 of the channel 3 are dimensioned so that the drops of the third type 23 circulate successively in the first, second and third zones 17, 18, 19 before escaping out. of the channel 3, and that the drops of the fourth type 24 circulate in each of the zones 17 to 20 of the channel 3 before escaping at the downstream end 16 of the channel 3.
- the drops of each type 21 to 24 circulate downstream of the channel 3, respectively along parallel circulation axes and spaced from each other.
- Such a microchannel thus makes it possible to sort four types of drops of different nature.
- the microchannel 2 is formed with four successive channels 3, whose inclinations with respect to the flow of the first fluid are becoming smaller, The first channel 3a, the more inclined, separates the smaller drops 24, the second channel 3b separates the drops a little larger 23, the third channel 3c separates the still slightly larger drops 22, and the third channel 3d separates the largest drops 21.
- the microchannel 2 may also be equipped with a channel 3, extending for example along the axis of circulation of the carrier fluid, and provided with a decrease in its width and / or height. This reduction may have the form of a step or discontinuous step, or a progressive form such as that shown in Figure 10.
- the geometry of the channels can be used as a motor to transport the drops.
- the invention makes it possible to move the drops in a two-dimensional field, even in the absence of a flow of a carrier fluid.
- the invention can even be used to move countercurrent drops with respect to the flow of the carrier fluid.
- the channel 3 can be equipped with a stepped or progressive widening zone 26, so that the drop 5 flowing in the channel 3 is accelerated during the passage of this zone.
- the braking of the drops 5 can also be obtained (FIG. 12) by arranging, on either side of the channel 3 in which they circulate, secondary channels 27 whose function is to locally increase the section of the microchannel 2. This has the effect of to decrease the speed locally circulation of the carrier fluid, and, consequently, the speed of circulation of the drops 5.
- the number, shape and position of the secondary channels 27 can be varied as needed, the most important being the local increase of the microchannel section.
- the opposite effect can be obtained by replacing the channels 27 with ribs forming a local decrease in the section of the microchannel 2.
- FIG. 13 represents a microchannel 2 comprising a trapping zone 28 of the drops, formed by a pocket or a cavity 29 made in the wall of the microchannel 2.
- the microchannel is not equipped with a channel, the drops transported by the flow of carrier fluid F being trapped in the trapping area or areas if the latter are in the path of the drops.
- the trapping areas may be smaller or larger than the drops or bubbles to be trapped, depending on the applications and the nature of the drops or bubbles.
- FIG. 14 represents a channel 3 equipped with a trapping zone 28 of the drops, formed by a pocket or cavity formed on one side of the channel 3, in a wall 4 of the microchannel 2.
- the pocket 29 is connected to the channel 3 by a mouth 30 and is capable of trapping a predefined number of drops. In the case of FIG. 13, this zone makes it possible to contain only one drop 5.
- the section of the mouthpiece 30 can be adapted according to the applications. In the case where the mouth 30 has a larger section than that of the channel 3, the drop or drops 5 can be automatically attracted to the trapping zones 28.
- the mouth 30 has a smaller section or substantially equal to that of the channel 3, it may be necessary to force the drops 5 to enter the trapping area 28.
- This can be achieved by any appropriate means, particular using the method described in WO 2006/018490 and WO 2007/138178 and using a beam laser directed on the interface between a droplet and the carrier fluid or between two drops, in order to influence the movement of the drops.
- the drops may be removed from the entrapment zones 28 by increasing the flow rate of the carrier fluid, or by forcing the drops to exit using the aforementioned method.
- Figure 15 shows a channel 3 on either side of which are formed several trapping zones 28, 29, spaced from each other and arranged in staggered rows.
- Each trapping zone 28, 29 may be sized to trap a predefined number of drops 5, a drop for the case of the zones 28 and two drops for the case of the zone 31, and / or to trap drops of a particular nature .
- the microchannel 2 can also be equipped with a network of channels formed of a main channel 3, through which the drops arrive, from which extend one or more derivative channels 31 in which are arranged obstacles 32 for retaining, at least temporarily, the drops 5 in the corresponding derivative channel 31, as seen in Figure 16. These then form trapping areas.
- the derived channels 31 may or may not extend downstream of the obstacle 32.
- the auxiliary channels 31 may be equipped with wetting zones 33.
- a wetting zone is formed by a zone whose wetting properties of the wall 4 have been modified.
- the modification of the wetting properties can also be obtained using chemical methods, such as silanization or plasma etching, or using physical methods, for example by introducing hydrophilic pads to which the droplet comes. cling (fakir effect).
- the trapping zones may also comprise elements intended to react with the content of the drops, so as to form microreactors or to detect the presence of chemical molecules and / or biochemical in the drop or drops concerned.
- a DNA sequence can be detected if the complementary sequence is grafted locally on the wall of the corresponding trapping area.
- the microchannel comprises, for example, two parallel channels 34, 35, each intended for the circulation of a particular type of drops 36, 37, from which extend derivative channels 31 whose downstream ends form trapping zones 28.
- the trapping zones 28 are arranged near or adjacent one another so that a drop of a first type 36 is near or in contact with a drop of a second type 37.
- FIG. 19 represents a microchannel 2 presenting a channel 3 equipped with several successive trapping zones 28, arranged in series.
- the trapping zones 28 form a buffer zone T defined by a widening of the microchannel and in which the drops 5 pass a determined duration necessary for example to incubate a chemical or biochemical reaction and / or to allow their observation.
- the trapping zones 28 may also be in matrix disposition as represented in FIG. 20, via a main channel 3 and parallel derivative channels 31, each connected to a determined number of trapping zones 28.
- FIG. 21 shows a microchannel 2 comprising feed means 38 for parallel trains of drops of different types 21 to 24, parallel means for introducing drops of different nature into the microchannel 2, and channels 3 formed in the microchannel 2 from the introduction means 39 for guiding the drops 21 to 24 out of each introduction means to a predetermined zone of the microchannel 2. There are thus formed parallel trains of different drops in the microchannel.
- microchannels presented above for the treatment of drops in a carrier fluid can also be used for the treatment of bubbles.
- the invention makes it possible, in particular, to integrate the preparation of the samples into a microfluidic chip and to bring the samples to the observation points in a simple and robust manner.
- a microfluidic circuit according to the invention can be applied in the field of biotechnology or "chimietech”, but also in the field of fluid display and the observation of reactions in microdroplets.
- microfluidic circuit could be in a format now standard, such as "Micro-Arrays” or biochips, for example DNA or protein chips, or cell culture chips.
- biochips consist of a matrix of areas where the surface is functionalized with biomolecules, the size and distance between these areas being approximately the same size as microfluidic drops and channels.
- the invention makes it possible to bring particular drops, the content of which is known, to the functionalized sites and to bring them in contact with the surface in order to produce the hybridization that will allow the biological measurement. In this way, the invention makes it possible to interface the biochip technology with the advantages of fluid handling in microfluidics. As indicated above, the trajectory of the drops can be actively modified, with the aid of a laser, in order to bring the drops into a trap or in a determined zone of a microchannel.
- such a method can also be used to direct a drop from one channel to another, for example to choose between different trajectories that could follow the drop.
- the carrier fluid may, if necessary, contain a dye (black ink for example) absorbing the wavelength of the laser.
- a dye black ink for example
- the local heating of the carrier fluid using the laser in a channel or close to it, attracts the drop in this channel.
- the heating may also be performed at the interface between the droplet and the carrier fluid to attract the drop in a specific channel.
- the laser can be positioned to block the advance of one drop and deflect it into another channel.
- the heating can also be applied locally or globally by means of electric heating elements.
- such absorption can be made either directly by the material constituting the microchannel, or by depositing in the microchannel or in the channel a layer or a particle of a material absorbing laser radiation.
- the dielectrophoresis forces can also be used to influence the trajectory of the drops, or to trap drops.
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- Chemical & Material Sciences (AREA)
- Dispersion Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Analytical Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Hematology (AREA)
- Clinical Laboratory Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Automatic Analysis And Handling Materials Therefor (AREA)
- Micromachines (AREA)
- Apparatus Associated With Microorganisms And Enzymes (AREA)
Abstract
Description
Claims
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19201464.5A EP3632566B1 (fr) | 2009-09-29 | 2010-09-29 | Procédé de traitement de gouttes ou de bulles dans un circuit microfluidique |
| DE10778686.5T DE10778686T1 (de) | 2009-09-29 | 2010-09-29 | Mikrofluidischer schaltkreis |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR0904639A FR2950544B1 (fr) | 2009-09-29 | 2009-09-29 | Circuit microfluidique |
| PCT/FR2010/052051 WO2011039475A1 (fr) | 2009-09-29 | 2010-09-29 | Circuit microfluidique |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19201464.5A Division-Into EP3632566B1 (fr) | 2009-09-29 | 2010-09-29 | Procédé de traitement de gouttes ou de bulles dans un circuit microfluidique |
| EP19201464.5A Division EP3632566B1 (fr) | 2009-09-29 | 2010-09-29 | Procédé de traitement de gouttes ou de bulles dans un circuit microfluidique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2482983A1 true EP2482983A1 (fr) | 2012-08-08 |
| EP2482983B1 EP2482983B1 (fr) | 2020-04-29 |
Family
ID=42199939
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19201464.5A Active EP3632566B1 (fr) | 2009-09-29 | 2010-09-29 | Procédé de traitement de gouttes ou de bulles dans un circuit microfluidique |
| EP10778686.5A Active EP2482983B1 (fr) | 2009-09-29 | 2010-09-29 | Circuit microfluidique |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP19201464.5A Active EP3632566B1 (fr) | 2009-09-29 | 2010-09-29 | Procédé de traitement de gouttes ou de bulles dans un circuit microfluidique |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US9452432B2 (fr) |
| EP (2) | EP3632566B1 (fr) |
| JP (1) | JP5752694B2 (fr) |
| KR (1) | KR101720683B1 (fr) |
| DE (1) | DE10778686T1 (fr) |
| ES (2) | ES2803402T3 (fr) |
| FR (1) | FR2950544B1 (fr) |
| WO (1) | WO2011039475A1 (fr) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10792659B2 (en) | 2018-10-22 | 2020-10-06 | Pattern Bioscience, Inc. | Droplet-generating microfluidic chips and related methods |
| US10953404B1 (en) | 2020-04-24 | 2021-03-23 | Pattern Bioscience, Inc. | Apparatuses for contactless loading and imaging of microfluidic chips and related methods |
| US12036556B2 (en) | 2018-04-16 | 2024-07-16 | Pattern Bioscience, Inc. | Methods and apparatus for forming 2-dimensional drop arrays |
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| CN100392316C (zh) * | 2006-03-27 | 2008-06-04 | 博奥生物有限公司 | 控制液体在微管路中连续流动的流路结构 |
| EP2608878A4 (fr) | 2010-08-23 | 2017-11-15 | President and Fellows of Harvard College | Ondes acoustiques en microfluidique |
| FR2996545B1 (fr) | 2012-10-08 | 2016-03-25 | Ecole Polytech | Procede microfluidique de traitement et d'analyse d'une solution contenant un materiel biologique, et circuit microfluidique correspondant. |
| FR2996544B1 (fr) * | 2012-10-08 | 2015-03-13 | Ecole Polytech | Circuit microfluidique permettant la mise en contact de gouttes de plusieurs fluides, et procede microfluidique correspondant. |
| KR101410129B1 (ko) * | 2012-12-11 | 2014-06-25 | 서강대학교산학협력단 | 액적 병합장치 |
| US10662470B2 (en) | 2015-03-16 | 2020-05-26 | Luminex Corporation | Apparatus and methods for multi-step channel emulsification |
| CN108472621B (zh) * | 2015-08-27 | 2022-04-29 | 哈佛学院院长及董事 | 声波分拣 |
| CN108698814A (zh) | 2015-12-30 | 2018-10-23 | 伯克利之光生命科技公司 | 用于光学驱动的对流和移位的微流体设备、试剂盒及其方法 |
| FR3056927B1 (fr) | 2016-09-30 | 2021-07-09 | Ecole Polytech | Procede microfluidique de manipulation de microgouttes |
| KR102043161B1 (ko) * | 2018-06-07 | 2019-11-11 | 한양대학교 산학협력단 | 미세 액적 병합을 위한 미세 유체 제어 장치 및 이를 이용한 미세 액적의 병합 방법 |
| WO2020168258A1 (fr) | 2019-02-15 | 2020-08-20 | Berkeley Lights, Inc. | Repositionnement assisté par laser d'un micro-objet et culture d'une cellule dépendante de la fixation dans un environnement microfluidique |
| CN109825417B (zh) * | 2019-03-10 | 2023-12-29 | 新羿制造科技(北京)有限公司 | 一种液滴引导装置 |
| WO2020223555A1 (fr) | 2019-04-30 | 2020-11-05 | Berkeley Lights, Inc. | Procédés d'encapsulation et d'analyse de cellules |
| FR3098128B1 (fr) | 2019-07-05 | 2023-11-17 | Commissariat Energie Atomique | Dispositif microfluidique comportant une microgoutte présentant une matrice sol-gel. |
| US11701658B2 (en) | 2019-08-09 | 2023-07-18 | President And Fellows Of Harvard College | Systems and methods for microfluidic particle selection, encapsulation, and injection using surface acoustic waves |
| KR102756048B1 (ko) | 2022-11-08 | 2025-01-21 | 재단법인 오송첨단의료산업진흥재단 | 안정적 시약 탑재를 위한 분기형 바이오칩 |
| EP4521118A1 (fr) | 2023-09-06 | 2025-03-12 | Stilla Technologies | Unité de chargement pour un dispositif d'analyse |
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| US4233029A (en) | 1978-10-25 | 1980-11-11 | Eastman Kodak Company | Liquid transport device and method |
| DE10120035B4 (de) * | 2001-04-24 | 2005-07-07 | Advalytix Ag | Verfahren und Vorrichtung zur Manipulation kleiner Flüssigkeitsmengen auf Oberflächen |
| US7318902B2 (en) * | 2002-02-04 | 2008-01-15 | Colorado School Of Mines | Laminar flow-based separations of colloidal and cellular particles |
| US6877528B2 (en) * | 2002-04-17 | 2005-04-12 | Cytonome, Inc. | Microfluidic system including a bubble valve for regulating fluid flow through a microchannel |
| WO2004016948A1 (fr) * | 2002-08-15 | 2004-02-26 | Memsflow Aps | Dispositif de manutention de liquides dans des microcanaux et leurs procedes d'utilisation |
| US9477233B2 (en) * | 2004-07-02 | 2016-10-25 | The University Of Chicago | Microfluidic system with a plurality of sequential T-junctions for performing reactions in microdroplets |
| FR2873171B1 (fr) | 2004-07-19 | 2007-12-07 | Centre Nat Rech Scient Cnrse | Circuit microfluidique a composant actif |
| JP2006058031A (ja) * | 2004-08-17 | 2006-03-02 | Hitachi High-Technologies Corp | 化学分析装置 |
| US7918244B2 (en) * | 2005-05-02 | 2011-04-05 | Massachusetts Institute Of Technology | Microfluidic bubble logic devices |
| US8936945B2 (en) * | 2005-11-17 | 2015-01-20 | The Regents Of The University Of Michigan | Compositions and methods for liquid metering in microchannels |
| FR2901717A1 (fr) * | 2006-05-30 | 2007-12-07 | Centre Nat Rech Scient | Procede de traitement de gouttes dans un circuit microfluidique. |
| WO2008124846A2 (fr) * | 2007-04-10 | 2008-10-16 | Advanced Liquid Logic, Inc. | Dispositif de distribution de gouttelettes et procédés |
| MX346456B (es) * | 2008-02-27 | 2017-03-21 | Boehringer Ingelheim Microparts Gmbh | Dispositivo para la separación de plasma. |
| US8340913B2 (en) * | 2008-03-03 | 2012-12-25 | Schlumberger Technology Corporation | Phase behavior analysis using a microfluidic platform |
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2010
- 2010-09-29 ES ES10778686T patent/ES2803402T3/es active Active
- 2010-09-29 WO PCT/FR2010/052051 patent/WO2011039475A1/fr not_active Ceased
- 2010-09-29 US US13/498,927 patent/US9452432B2/en active Active
- 2010-09-29 EP EP19201464.5A patent/EP3632566B1/fr active Active
- 2010-09-29 KR KR1020127011313A patent/KR101720683B1/ko active Active
- 2010-09-29 EP EP10778686.5A patent/EP2482983B1/fr active Active
- 2010-09-29 JP JP2012531479A patent/JP5752694B2/ja active Active
- 2010-09-29 ES ES19201464T patent/ES2906718T3/es active Active
- 2010-09-29 DE DE10778686.5T patent/DE10778686T1/de active Pending
Non-Patent Citations (1)
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US12036556B2 (en) | 2018-04-16 | 2024-07-16 | Pattern Bioscience, Inc. | Methods and apparatus for forming 2-dimensional drop arrays |
| US10792659B2 (en) | 2018-10-22 | 2020-10-06 | Pattern Bioscience, Inc. | Droplet-generating microfluidic chips and related methods |
| US11344890B2 (en) | 2018-10-22 | 2022-05-31 | Pattern Bioscience, Inc. | Vacuum-loaded, droplet-generating microfluidic chips and related methods |
| US10953404B1 (en) | 2020-04-24 | 2021-03-23 | Pattern Bioscience, Inc. | Apparatuses for contactless loading and imaging of microfluidic chips and related methods |
| US12128415B2 (en) | 2020-04-24 | 2024-10-29 | Pattern Bioscience, Inc. | Apparatuses for contactless loading and imaging of microfluidic chips and related methods |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2013505827A (ja) | 2013-02-21 |
| KR101720683B1 (ko) | 2017-03-28 |
| US9452432B2 (en) | 2016-09-27 |
| WO2011039475A1 (fr) | 2011-04-07 |
| ES2803402T3 (es) | 2021-01-26 |
| JP5752694B2 (ja) | 2015-07-22 |
| EP2482983B1 (fr) | 2020-04-29 |
| EP3632566B1 (fr) | 2021-11-10 |
| US20120315203A1 (en) | 2012-12-13 |
| ES2906718T3 (es) | 2022-04-20 |
| DE10778686T1 (de) | 2019-12-19 |
| KR20120082015A (ko) | 2012-07-20 |
| FR2950544A1 (fr) | 2011-04-01 |
| FR2950544B1 (fr) | 2011-12-09 |
| EP3632566A1 (fr) | 2020-04-08 |
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