WO2016084381A1 - 微細液送構造体、及び分析装置 - Google Patents
微細液送構造体、及び分析装置 Download PDFInfo
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- WO2016084381A1 WO2016084381A1 PCT/JP2015/005904 JP2015005904W WO2016084381A1 WO 2016084381 A1 WO2016084381 A1 WO 2016084381A1 JP 2015005904 W JP2015005904 W JP 2015005904W WO 2016084381 A1 WO2016084381 A1 WO 2016084381A1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/08—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor using a stream of discrete samples flowing along a tube system, e.g. flow injection analysis
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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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
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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
- B01L3/502746—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 for controlling flow resistance, e.g. flow controllers, baffles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B81—MICROSTRUCTURAL TECHNOLOGY
- B81B—MICROSTRUCTURAL DEVICES OR SYSTEMS, e.g. MICROMECHANICAL DEVICES
- B81B1/00—Devices without movable or flexible elements, e.g. microcapillary devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
- G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
- G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
- G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
- G01N33/54366—Apparatus specially adapted for solid-phase testing
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N37/00—Details not covered by any other group of this subclass
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- 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
- B01L2200/0621—Control of the sequence of chambers filled or emptied
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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
- B01L2200/10—Integrating sample preparation and analysis in single entity, e.g. lab-on-a-chip concept
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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
- B01L2300/06—Auxiliary integrated devices, integrated components
- B01L2300/0681—Filter
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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
- B01L2300/06—Auxiliary integrated devices, integrated components
- B01L2300/069—Absorbents; Gels to retain a fluid
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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
- B01L2300/0809—Geometry, shape and general structure rectangular shaped
- B01L2300/0816—Cards, e.g. flat sample carriers usually with flow in two horizontal directions
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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
- B01L2300/0861—Configuration of multiple channels and/or chambers in a single devices
- B01L2300/0877—Flow chambers
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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
- B01L2300/16—Surface properties and coatings
- B01L2300/161—Control and use of surface tension forces, e.g. hydrophobic, hydrophilic
- B01L2300/165—Specific details about hydrophobic, oleophobic surfaces
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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
- 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
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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
- B01L2400/00—Moving or stopping fluids
- B01L2400/06—Valves, specific forms thereof
- B01L2400/0688—Valves, specific forms thereof surface tension valves, capillary stop, capillary break
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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
- B01L2400/00—Moving or stopping fluids
- B01L2400/08—Regulating or influencing the flow resistance
- B01L2400/084—Passive control of flow resistance
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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
- 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
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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
- B01L3/502738—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 integrated valves
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M1/00—Apparatus for enzymology or microbiology
Definitions
- the present invention relates to a fine liquid feed structure that uses capillary action as a driving force for transferring a liquid, and in particular, a fine liquid feed structure capable of arbitrarily controlling the liquid transfer direction, and such a fine liquid feed structure.
- the present invention relates to an analyzer provided with a structure.
- Patent Document 1 proposes a microstructure that constitutes a liquid flow system that uses a capillary phenomenon as a driving force for transferring liquid by arranging a plurality of fine protrusions at intervals that cause a capillary phenomenon. Yes.
- Non-Patent Document 1 it is studied to control the fluidity of a liquid in a flow system (capillary pump) using such a capillary phenomenon.
- FIG. 10 shows an example of how the liquid flows inside the capillary pump exemplified in Non-Patent Document 1, but in the flow system of Non-Patent Document 1, as shown in FIG.
- the liquid feeding direction may be biased, and a similar diagram is shown in FIG. It is also shown in 4 (a).
- the present invention has been made in view of the above circumstances, and in a fine liquid feed structure in which a plurality of fine protrusions are arranged at intervals that cause capillary action, the flow of a liquid feed path formed between the fine protrusions It is an object of the present invention to provide a fine liquid feed structure in which the liquid feed direction can be arbitrarily controlled by making a difference in resistance, and an analysis device including such a fine liquid feed structure.
- the fine liquid feeding structure according to the present invention is a fine liquid feeding structure in which a plurality of fine protrusions are arranged at intervals that cause capillary action, and the fine protrusions are arranged in a line and adjacent to each other.
- Unit rows having a liquid feed path as a liquid feed path are periodically arranged, and for each unit row, at least one of the liquid feed paths is relatively reduced in flow resistance compared to other liquid feed paths.
- the low flow resistance liquid feed path is arranged along the predetermined liquid feed direction.
- the analyzer according to the present invention includes the fine liquid feeding structure as described above, and obtains a propulsive force from the fine liquid feeding structure to feed a preparation liquid containing an analysis target.
- the liquid feeding direction is not generated without deviation in the liquid feeding direction. Can be arbitrarily controlled with high reproducibility.
- FIG. 1 is a perspective view showing an example of an analyzer according to the present embodiment, and FIG. 2 is an exploded perspective view thereof.
- the analyzer 1 is configured as an influenza diagnostic kit by an immunochromatography method, impregnated with a substrate 2, a cover body 3 covering the surface of the substrate 2, and a colloidal gold labeled antibody that binds to the influenza antigen.
- the conjugate pad 4 and the absorption pad 5 for absorbing the residual liquid after the analysis are provided.
- a conjugate pad abutting portion 4a On the surface of the substrate 2, a conjugate pad abutting portion 4a, a first capillary pump portion 6a, a liquid feed channel portion 7, a detecting portion 8, a second capillary pump portion 6b, and an absorption pad abutting portion 5a are formed. ing.
- the detection unit 8 has a test flow path 8a coated with a capture antibody that captures an influenza antigen bound to a colloidal gold labeled antibody, and a control flow coated with a capture antibody that captures a colloidal gold labeled antibody not bound with an influenza antigen.
- a path 8b is provided.
- the test flow path 8a is formed on a wide shallow bottom, and the capture antibody CA is applied to the bottom surface thereof, thereby facilitating capture of the influenza antigen LA bound to the gold colloid-labeled antibody. be able to.
- the control flow path 8b can be the same.
- FIG. 3B is a cross-sectional view taken along the line AA in FIG.
- the first capillary pump unit 6a and the second capillary pump unit 6b are configured by a fine liquid feed structure that uses a capillary phenomenon as a driving force for feeding a preparation liquid containing an analysis target.
- the structure will be described later.
- FIG. 4 is a schematic plan view of the substrate 2, and a fine liquid feeding structure is formed at a portion indicated by a halftone dot in the drawing.
- the substrate 2 may be formed by cast molding using an ultraviolet curable, thermosetting or two-component curable resin such as polydimethylsiloxane as long as the fine shape can be transferred and formed well. Further, it may be molded by injection molding, nanoimprinting or the like using a thermoplastic resin such as polystyrene, polycarbonate, cycloolefin copolymer or cycloolefin polymer. Further, it may be formed by etching, ultraprecision machining or the like using glass or silicon.
- the cover body 3 can be made of resin or glass, and is preferably transparent to such an extent that the detection unit 8 formed on the surface of the substrate 2 can be seen through.
- the cover body 3 includes the first capillary pump unit 6a, the liquid feed channel unit 7, the detection while holding the conjugate pad 4 and the absorption pad 5 in the cutouts 4b and 5b formed on one end side.
- the part 8 (the test flow path 8a and the control flow path 8b) and the second capillary pump part 6b are joined to the substrate 2 so as to be sealed.
- the conjugate pad abutting portion 4a is formed on the bottom surface of the first capillary pump portion 6a so that the first capillary pump portion 6a sealed with the cover body 3 opens toward the conjugate pad abutting portion 4a. It is formed to be the same depth as or slightly deeper than that. Thus, the conjugate pad 4 and the first capillary pump unit 6a are connected via the opening.
- the absorption pad contact portion 5a is the same as the bottom surface of the second capillary pump portion 6b so that the second capillary pump portion 6b sealed by the cover body 3 opens toward the absorption pad contact portion 5a. It is formed to be a little deeper than that. Thereby, the absorption pad 5 and the 2nd capillary pump part 6b are connected through the said opening.
- a sample preparation solution containing a sample (analysis target) such as nasal discharge collected from the subject is used as the conjugate pad 4. Dripping into.
- the specimen preparation liquid dropped on the conjugate pad 4 oozes out from the conjugate pad 4 and enters the first capillary pump unit 6a.
- the specimen preparation liquid is fed to the liquid feed flow path section 7 by proceeding through the first capillary pump section 6a using the capillary phenomenon as a driving force.
- the sample preparation liquid sent to the liquid feeding flow path section 7 flows in the liquid feeding flow path section 7 by capillary action and is sent to the detection section 8 formed on the flow path.
- the second capillary pump unit 6b When the residual liquid of the sample preparation liquid that has passed through the detection unit 8 reaches the second capillary pump unit 6b, it proceeds in the second capillary pump unit 6b using the capillary phenomenon as a driving force. At this time, if the flow length of the sample preparation liquid increases, the flow resistance also increases accumulatively, and the liquid feed speed of the sample preparation liquid decreases, but the second capillary pump unit 6b spreads as shown in the figure. In the fine liquid feed structure to be described later, the number of liquid feed paths 61 formed between the fine protrusions 60 is increased along the flow direction so that the liquid feed speed due to the flow resistance is increased. The decrease can be suppressed.
- the sample preparation liquid can be fed at a constant flow rate without using an external pump, and analysis (diagnosis) with high reproducibility becomes possible.
- the residual liquid of the specimen preparation liquid is absorbed by the absorption pad 5 after traveling through the second capillary pump unit 6b.
- the colloidal gold labeled antibody impregnated in the conjugate pad 4 is eluted into the sample preparation solution. If the patient is infected with influenza, the specimen preparation solution contains influenza antigen, and a part of the colloidal gold-labeled antibody eluted in the specimen preparation solution binds to the influenza antigen, and the influenza antigen binds. Together with the remaining gold colloid-labeled antibody, it is sent to the detection section 8 formed on the flow path of the liquid feed flow path section 7.
- the detection unit 8 includes the test channel 8a coated with the capture antibody that captures the influenza antigen bound to the gold colloid-labeled antibody, and the capture antibody that captures the gold colloid-labeled antibody not bound to the influenza antigen.
- coated is provided. Therefore, if the color of the gold colloid particles is visually recognized only in the control flow path 8b after the specimen preparation solution has passed through the detection unit 8, it can be diagnosed that the subject is not infected with influenza, and the test flow path 8a also has gold. If the color developed by the colloidal particles is visible, it can be diagnosed that the subject is infected with influenza.
- FIG. 5 is a schematic plan view showing an enlarged main part of an example of the fine liquid feeding structure according to the present embodiment.
- a fine liquid feed structure a plurality of fine protrusions 60 are arranged in a line, and unit rows having a liquid feed path 61 as a gap between adjacent fine protrusions 60 are periodically arranged.
- the interval between the protrusions 60 is an interval that causes capillary action (for example, the interval between adjacent fine protrusions 60 in one unit row is 1-1000 ⁇ m, and the interval between adjacent unit rows is 1-1000 ⁇ m).
- the fine protrusions 60 are 120 ⁇ m in length, 30 ⁇ m in width, and 30 ⁇ m in height, the interval between adjacent fine protrusions 60 in one unit row is 30 ⁇ m, and the interval between adjacent unit rows is 60 ⁇ m. It was.
- the height of the fine protrusion 60 corresponds to the depth of the bottom surface of the first capillary pump portion 6a and the second capillary pump portion 6b made of the fine liquid feed structure according to the present embodiment.
- the tip of the protrusion 60 is in close contact with the cover body 3. Thereby, the space around the fine protrusion 60 is sealed by the cover body 3.
- the liquid projection 61 formed in one unit row and the liquid feed passage 61 formed in the unit row adjacent to the unit row are finely projected so as to be alternately arranged as illustrated. 60 are evenly arranged.
- the space between these unit rows is increased.
- the liquid supply path of the liquid by a capillary phenomenon will be formed in a parallel circuit form, and flow resistance can be reduced compared with the case where a liquid supply path is formed in a series circuit form. Therefore, it is possible to efficiently obtain a driving force for liquid feeding utilizing the capillary phenomenon.
- an edge portion 62 that exhibits a pinning effect is formed on the exit side of each liquid feed path 61 in the adjacent fine protrusion 60 that forms the liquid feed path 61.
- the pinning effect means that when the liquid level that has traveled on the plane at the contact angle ⁇ reaches the edge portion (see FIG. 6A), the liquid level is flat and edged. This refers to a phenomenon in which the edge cannot be overcome until the contact angle becomes ⁇ + ( ⁇ ) (see FIG. 6B), where ⁇ is the angle formed with the outer surface of the portion.
- the angle ⁇ formed by the plane at this time and the outer surface of the edge portion is defined as the pinning angle.
- At least one of the liquid feed paths 61 is a low flow resistance liquid feed path 61a in which the flow resistance is relatively reduced as compared with the other liquid feed paths 61b.
- the pinning angle of the edge portion 62b formed on the outlet side of the liquid feeding path 61b of the adjacent fine projections 60b and 60c by forming the other liquid feeding path 61b excluding the low flow resistance liquid feeding path 61a is reduced.
- the flow resistance liquid supply path 61a By forming the flow resistance liquid supply path 61a and making it smaller than the pinning angle of the edge portion 62a formed on the outlet side of the low flow resistance liquid supply path 61a of the adjacent fine protrusions 60a, 60b, the low flow resistance liquid The flow resistance of the feed path 61a is relatively reduced as compared with the flow resistance of the other liquid feed paths 61a.
- the fine protrusions 60a are rectangular and edge portions 62a having a pinning angle of 90 ° are formed at both ends.
- the fine protrusion 60b has an edge portion 62a having a pinning angle of 90 ° formed at one end and an edge portion 62b having a pinning angle of 45 ° formed at the other end, and the fine protrusion 60c is pinned at both ends.
- An edge portion 62b having a 45 ° angle is formed. You may attach R to the front-end
- the liquid supply paths 61 has a low flow resistance liquid supply path 61a in which the flow resistance is relatively reduced as compared with the other liquid supply paths 61b.
- the fine protrusions 60a, 60b, and 60c are arranged so that the low flow resistance liquid feeding path 61a is arranged along a predetermined liquid feeding direction.
- the interval between adjacent unit rows is adjusted as appropriate (for example, the low flow resistance liquid feed path 61a is formed and widened in consideration of the interval between the adjacent fine protrusions 60a, 60b), etc.
- the flow resistance of the inter-row liquid feed path 61c formed between the rows is relatively reduced than the flow resistance of the low flow resistance liquid feed path 61a.
- the liquid preferentially passes through the low flow resistance liquid supply path 61a having a low flow resistance among the liquid supply paths 61 formed in one unit row (see FIG. 7).
- the liquid spreads to the inter-row liquid feed path 61c formed between the next unit rows by capillary action (FIG. 7 (c)).
- FIG. 7E See (e)), since the flow resistance of the inter-row liquid feed path 61c is the lowest, until the inter-row liquid feed path 61c is filled with the liquid, the tip of the liquid is the next unit row and the next unit row. It does not proceed to the inter-row liquid feed path 61c formed between the two (see FIG. 7E).
- the first capillary pump section 6a and the second capillary pump section 6b are each formed in an isosceles triangle shape, and the low flow resistance liquid feeding section is formed along a perpendicular line extending from the top to the bottom.
- the arrangement of the low flow resistance liquid feeding part 61a is in the desired liquid feeding direction. It can be set appropriately depending on the situation. For example, as shown in FIG. 8A, when it is desired to curve the liquid feeding direction, or when it is desired to branch the liquid feeding direction into two or more directions as shown in FIG. By disposing the low flow resistance liquid feeding unit 61a along the direction indicated by the dotted line, the liquid feeding direction can be guided in an arbitrary direction.
- the liquid feeding direction is biased.
- the liquid feeding direction can be arbitrarily controlled with good reproducibility.
- the liquid feeding path 61 is used in order to reduce the flow resistance of the low flow resistance liquid feeding path 61a relative to the flow resistance of the other liquid feeding path 61b.
- the flow resistance of the liquid feed path 61a is relatively reduced as compared with the flow resistance of the other liquid feed paths 61b, the present invention is not limited to this.
- the following may be used.
- An edge portion 62 that exhibits a pinning effect is formed on the outlet side of the liquid feeding path 61b only on the adjacent fine protrusion 60 by forming another liquid feeding path 61b, for example, a low flow resistance liquid feeding path
- the shape of the outlet side of the liquid feed path 61a of the adjacent fine projection that forms 61a is an R shape that does not exhibit the pinning effect, so that the flow resistance of the low flow resistance liquid feed path 61a Relative to the flow resistance of the liquid feed path 61b.
- the flow resistance of the low flow resistance liquid feed path 61a is increased by forming the other liquid feed path 61b and applying a hydrophobic treatment to a portion on the liquid feed path 61b side of the adjacent fine protrusion 60 to increase the flow resistance. Relative to the flow resistance of the other liquid delivery path 61b. 3) By increasing the cross-sectional area of the low flow resistance liquid feed path 61a, the flow resistance of the low flow resistance liquid feed path 61a is relatively reduced as compared with the flow resistance of the other liquid feed paths 61b.
- the flow resistance of the inter-row liquid feed path 61c formed between the unit rows relative to the flow resistance of the low flow resistance liquid feed path 61a in the above-described embodiment, between the adjacent unit rows.
- interval of this is given suitably, it is not limited to this.
- the flow resistance of the inter-row liquid feed path 61c may be relatively reduced from the flow resistance of the low flow resistance liquid feed path 61a by using the methods shown in the above 1) to 3).
- the shape of the fine protrusion 60 is not limited to the above-described embodiment, and can be appropriately designed as long as the effect of the present invention is not hindered.
- test channel 8a and the control channel 8b provided in the detection unit 8 are formed in a wide shallow bottom and a capture antibody is applied to the bottom surface. It is not limited to this.
- the above-described fine liquid feeding structure is also formed in the test flow path 8a and the control flow path 8b provided in the detection unit 8, and the specimen preparation passing through these flow paths 8a and 8b is prepared.
- the liquid feeding direction of the liquid may be controlled.
- FIG. 9B is a cross-sectional view taken along the line BB in FIG.
- influenza diagnostic kit is described as an example, but the present invention is not limited to this.
- the present invention can be applied to various analyzers that are required to use capillary action as a driving force for feeding a preparation liquid containing an analysis target.
- Example 1 The same procedure as in Example 1 was performed except that a capillary pump in which all the fine protrusions were arranged as the same as the fine protrusions 60a in the example shown in FIG.
- Example 1 was the same as Example 1 except that a capillary pump in which all the fine protrusions were arranged as the same as the fine protrusions 60c in the example shown in FIG.
- the present invention is not limited to medical analyzers such as influenza diagnostic kits, but can be applied to analyzers in various fields.
- Analyzing device 60 (60a, 60b, 60c) Fine projection 61 Liquid feeding path 61a Low flow resistance liquid feeding path 61b Other liquid feeding path 61c Inter-row liquid feeding path 62 (62a, 62b) Edge portion
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Abstract
Description
また、非特許文献1では、このような毛細管現象を利用した流動システム(キャピラリポンプ)において、液体の流動性を制御することが検討されている。
図1は、本実施形態に係る分析装置の一例を示す斜視図であり、図2は、その分解斜視図である。
これらの図に示す例において、分析装置1は、イムノクロマトグラフィー法によるインフルエンザ診断キットとして構成され、基板2と、基板2の表面を覆うカバー体3と、インフルエンザ抗原と結合する金コロイド標識抗体を含浸させたコンジュゲートパッド4と、分析後の残液を吸収させる吸収パッド5とを備えている。
なお、図3(b)は、図3(a)のA-A断面図である。
コンジュゲートパッド4に滴下された検体調製液は、コンジュゲートパッド4から浸み出して第1キャピラリポンプ部6aに浸入する。そして、検体調製液は、毛細管現象を推進力として第1キャピラリポンプ部6a内を進行して液送流路部7に送られる。液送流路部7に送られた検体調製液は、液送流路部7内を毛細管現象により流動して、その流路上に形成された検出部8に送られる。
このとき、検体調製液の流動長が増加すると、これに伴って流動抵抗も累積的に増加して検体調製液の液送速度が低下するが、第2キャピラリポンプ部6bを図示するような末広がり状に形成し、後述する微細液送構造体において微細突起60間に形成される液送路61の数が流動方向に沿って増加していくようにすることで、流動抵抗による液送速度の低下を抑制することができる。このようにすることで、外部ポンプを使用することなく、検体調製液を一定の流量で液送することができ、再現性の高い分析(診断)が可能になる。
検体調製液の残液は、第2キャピラリポンプ部6b内を進行した後に吸収パッド5に吸収される。
次に、前述した分析装置1において、液送の推進力として毛細管現象を利用して、分析対象を含む調製液を液送する微細液送構造体について説明する。
ここで、ピン止め効果とは、図6に示すように、接触角θで平面を進行してきた液面がエッジ部に達すると(図6(a)参照)、当該液面は、平面とエッジ部の外側の面とのなす角をαとしたときに、接触角がθ+(π-α)となるまで(図6(b)参照)、エッジ部を乗り越えられなくなる現象をいい、本実施形態では、このときの平面とエッジ部の外側の面とのなす角度αをピン止め角と定義する。
これにより、本実施形態によれば、液送方向に偏りが生じることなく、毛細管現象を利用して液送する際の流動性を再現性よく良好に制御することができる。
例えば、図8(a)に示すように、液送方向をカーブさせたい場合や、図8(b)に示すように、液送方向を二以上の方向に分岐させたい場合には、図中点線で示す方向に沿って低流動抵抗液送部61aを配置することで、液送方向を任意の方向に誘導することができる。
低流動抵抗液送路61aの流動抵抗を、他の液送路61bの流動抵抗よりも相対的に低減させるには、例えば、次のようにしてもよい。
2)他の液送路61bを形成して隣接する微細突起60の液送路61b側の部位に疎水処理を施して流動抵抗を高めることで、低流動抵抗液送路61aの流動抵抗を、他の液送路61bの流動抵抗よりも相対的に低減させる。
3)低流動抵抗液送路61aの断面積を大きくすることで、低流動抵抗液送路61aの流動抵抗を、他の液送路61bの流動抵抗よりも相対的に低減させる。
なお、図9(b)は、図9(a)のB-B断面図である。
フォトリソグラフィー法により微細加工を施して作製したモールド型に、ポリジメチルシロキサン(東レ・ダウコーニング社製SILPOT184;硬化剤との重量比10:1)をキャスティングし、図5に示す例と同一の配列のキャピラリポンプ(微細液送構造体)が表面に転写形成された基板を成形した。このようにして得られた基板の表面に、カバー体として大型スライドガラス(松浪硝子工業社製)をポリジメチルシロキサンの自己吸着で密着させてキャピラリポンプを封止した。
全ての微細突起を、図5に示す例における微細突起60aと同じものとして配列されたキャピラリポンプを基板表面に転写形成した以外は、実施例1と同様にした。
全ての微細突起を、図5に示す例における微細突起60cと同じものとして配列されたキャピラリポンプを基板表面に転写形成した以外は、実施例1と同様にした。
3%TRITON-X100(ダウケミカル社製)を調整液に用いて、カバー体に設けた投入口から滴下量5μLで滴下した。キャピラリポンプ内を毛管力で流動する調製液をデジタルマイクロスコープ(キーエンス社製VHK-1000)で撮影して、キャピラリポンプを調製液が通過する時間を測定し、流量のバラツキ(CV)を算出した。測定は5回行い、その平均値を表1に示す。上記CVが5%以下である場合、安定した送液が可能な良好な微細液送構造体として評価を「○」とし、上記CVが5%を超えるものの評価を「×」として表1に併せて示した。
60(60a,60b,60c) 微細突起
61 液送路
61a 低流動抵抗液送路
61b 他の液送路
61c 列間液送路
62(62a,62b) エッジ部
Claims (7)
- 毛細管現象を引き起こす間隔で複数の微細突起を配列してなる微細液送構造体であって、
前記微細突起が一列に並び、かつ、隣接する前記微細突起の間隙を液送路とする単位列が周期的に列設され、
前記単位列ごとに、前記液送路のうち少なくとも一つを、他の液送路よりも流動抵抗を相対的に低減させた低流動抵抗液送路とするとともに、
前記低流動抵抗液送路を所定の液送方向に沿って配置したことを特徴とする微細液送構造体。 - 前記単位列間に形成される列間液送路の流動抵抗を、前記低流動抵抗液送路の流動抵抗よりも相対的に低減させたことを特徴とする請求項1に記載の微細液送構造体。
- 前記低流動抵抗液送路を除く他の液送路を形成して隣接する前記微細突起の当該液送路の出口側に、ピン止め効果を発現するエッジ部を形成することで、
前記低流動抵抗液送路の流動抵抗を、他の液送路の流動抵抗よりも相対的に低減させた請求項1又は2に記載の微細液送構造体。 - 前記液送路を形成して隣接する前記微細突起の前記液送路の出口側に、ピン止め効果を発現するエッジ部を形成し、
前記低流動抵抗液送路を除く他の液送路を形成して隣接する前記微細突起に形成した前記エッジ部のピン止め角を、
前記低流動抵抗液送路を形成して隣接する前記微細突起に形成した前記エッジ部のピン止め角よりも小さくすることで、
前記低流動抵抗液送路の流動抵抗を、他の液送路の流動抵抗よりも相対的に低減させた請求項1又は2に記載の微細液送構造体。 - 前記低流動抵抗液送路を除く他の液送路を形成して隣接する前記微細突起の当該液送路側の部位に疎水処理を施すことで、
前記低流動抵抗液送路の流動抵抗を、他の液送路の流動抵抗よりも相対的に低減させた請求項1又は2に記載の微細液送構造体。 - 前記低流動抵抗液送路の断面積を、
前記低流動抵抗液送路を除く他の液送路の断面積よりも大きくすることで、
前記低流動抵抗液送路の流動抵抗を、他の液送路の流動抵抗よりも相対的に低減させた請求項1又は2に記載の微細液送構造体。 - 請求項1~5のいずれか一項に記載の微細液送構造体を備え、前記微細液送構造体により推進力を得て分析対象を含む調製液を液送することを特徴とする分析装置。
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| CN201580064246.8A CN107003329B (zh) | 2014-11-28 | 2015-11-27 | 微细送液结构体、以及分析装置 |
| JP2016561253A JP6601416B2 (ja) | 2014-11-28 | 2015-11-27 | 微細液送構造体、及び分析装置 |
| EP15863839.5A EP3226003A4 (en) | 2014-11-28 | 2015-11-27 | Micro liquid transfer structure and analysis device |
| KR1020177014314A KR101996078B1 (ko) | 2014-11-28 | 2015-11-27 | 미세 액체 이송 구조체 및 분석 장치 |
| US15/606,014 US20170259259A1 (en) | 2014-11-28 | 2017-05-26 | Micro liquid transfer structure and analysis device |
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| WO2020230572A1 (ja) * | 2019-05-15 | 2020-11-19 | デンカ株式会社 | 膜担体及び検査キット |
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| JP6288319B1 (ja) * | 2017-01-10 | 2018-03-07 | 栗田工業株式会社 | 水処理装置の運転方法 |
| US10590967B2 (en) * | 2018-03-26 | 2020-03-17 | City University Of Hong Kong | Unidirectional liquid transport systems and methods of manufacture thereof |
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| KR20170073695A (ko) | 2017-06-28 |
| JP6601416B2 (ja) | 2019-11-06 |
| EP3226003A1 (en) | 2017-10-04 |
| CN107003329A (zh) | 2017-08-01 |
| US20170259259A1 (en) | 2017-09-14 |
| TWI670114B (zh) | 2019-09-01 |
| EP3226003A4 (en) | 2018-06-20 |
| KR101996078B1 (ko) | 2019-07-03 |
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