WO2013061529A1 - ケミカルセンサ、生体分子検出装置及び生体分子検出方法 - Google Patents
ケミカルセンサ、生体分子検出装置及び生体分子検出方法 Download PDFInfo
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- WO2013061529A1 WO2013061529A1 PCT/JP2012/006515 JP2012006515W WO2013061529A1 WO 2013061529 A1 WO2013061529 A1 WO 2013061529A1 JP 2012006515 W JP2012006515 W JP 2012006515W WO 2013061529 A1 WO2013061529 A1 WO 2013061529A1
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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
- G01N33/52—Use of compounds or compositions for colorimetric, spectrophotometric or fluorometric investigation, e.g. use of reagent paper and including single- and multilayer analytical elements
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/645—Specially adapted constructive features of fluorimeters
- G01N21/6452—Individual samples arranged in a regular 2D-array, e.g. multiwell plates
- G01N21/6454—Individual samples arranged in a regular 2D-array, e.g. multiwell plates using an integrated detector array
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12Q—MEASURING OR TESTING PROCESSES INVOLVING ENZYMES, NUCLEIC ACIDS OR MICROORGANISMS; COMPOSITIONS OR TEST PAPERS THEREFOR; PROCESSES OF PREPARING SUCH COMPOSITIONS; CONDITION-RESPONSIVE CONTROL IN MICROBIOLOGICAL OR ENZYMOLOGICAL PROCESSES
- C12Q1/00—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions
- C12Q1/68—Measuring or testing processes involving enzymes, nucleic acids or microorganisms; Compositions therefor; Processes of preparing such compositions involving nucleic acids
- C12Q1/6813—Hybridisation assays
- C12Q1/6816—Hybridisation assays characterised by the detection means
- C12Q1/6825—Nucleic acid detection involving sensors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
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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
- G01N33/54373—Apparatus specially adapted for solid-phase testing involving physiochemical end-point determination, e.g. wave-guides, FETS, gratings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
- G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
- G01N21/64—Fluorescence; Phosphorescence
- G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
- G01N2021/6439—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes" with indicators, stains, dyes, tags, labels, marks
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2458/00—Labels used in chemical analysis of biological material
Definitions
- the present technology relates to a chemical sensor for detecting a biomolecule based on fluorescence emission, a biomolecule detection apparatus equipped with the chemical sensor, and a biomolecule detection method using the biomolecule detection apparatus.
- RNA DNA deoxyribonucleic acid
- RNA ribonucleic acid
- a method of detecting fluorescence is most commonly used.
- a target material to be detected is previously labeled with a fluorescent marker, and is adsorbed to the probe material by an optical sensor to which a probe material that specifically interacts with the target material is fixed. It detects fluorescence from the target material.
- Patent Document 1 discloses a semiconductor element for detecting an organic molecule in which a silicon substrate on which an organic molecular probe arrangement region is formed and a solid-state imaging element are integrated.
- the element is configured such that fluorescence generated by the combination of the organic molecular probe arranged in the organic molecular probe arrangement region and the target material is detected by the individual imaging element.
- Patent Document 2 discloses a biopolymer analysis chip in which a microlens is mounted between spots made of a double gate transistor (photoelectric conversion element) and a probe material. In this chip, the fluorescence generated from the target material combined with the probe material is condensed by the microlens and detected by the double gate transistor.
- a double gate transistor photoelectric conversion element
- a light-transmissive top gate electrode is formed on the upper surface of the microlens.
- Such a top gate electrode is considered to be formed of ITO (Indium Tin Oxide), graphene, or the like, which is a light transmissive electrode material.
- ITO Indium Tin Oxide
- graphene or the like
- an object of the present technology is to provide a chemical sensor, a biomolecule detection apparatus, and a biomolecule detection method capable of detecting a biomolecule with high accuracy.
- a chemical sensor includes a substrate, an optical layer, and an intermediate layer.
- the substrate has a plurality of photodiodes arranged in a plane.
- the optical layer is laminated on the substrate, and a waveguide for guiding fluorescence to each of the photodiodes is formed.
- the intermediate layer is laminated on the optical layer, and a probe holding region capable of holding a probe material is formed for each waveguide.
- the fluorescence caused by the binding between the probe material held in the probe holding region and the target material that specifically binds to the probe material is detected by the photodiode.
- the fluorescence since the fluorescence is guided to the photodiode by the waveguide provided for each photodiode, the fluorescence can be detected with high accuracy.
- the waveguide may be surrounded by a reflective surface having light reflectivity.
- the fluorescence incident on the waveguide is reflected by the reflecting surface, and the fluorescence can be detected regardless of the incident angle. Furthermore, it is possible to prevent the fluorescence from reaching the adjacent cell by the reflecting surface.
- the waveguide has a tapered shape whose diameter gradually decreases from the intermediate layer side to the photodiode side.
- fluorescence emitted isotropically can be condensed on the photodiode while being guided to the waveguide in a wide angle range.
- a spectral filter made of a spectral material that attenuates excitation light and transmits fluorescence may be formed in the waveguide.
- the excitation light can be prevented from reaching the photodiode.
- the excitation light is applied to the chemical sensor to generate fluorescence, but detection by the photodiode should ideally be zero. According to this configuration, only the fluorescence can reach the photodiode by the spectral filter.
- the spectral filter may be a color filter that transmits part of the fluorescence wavelength.
- the color filter may have a transmission wavelength different from that formed in the adjacent waveguide.
- the probe holding region is formed in a size facing the waveguide.
- the probe holding region that is, the fluorescence generation region is smaller than the entrance of the waveguide, most of the fluorescence can be guided to the waveguide and the fluorescence reaches the adjacent cell. Can be prevented.
- the probe holding region may be formed for some of the waveguides.
- the cell in which the probe holding region is not formed can be used as a reference for leaked excitation light.
- the excitation light is attenuated by the spectral filter, but may not be completely attenuated.
- the fluorescence detection signal can be corrected by referring to the signal of the cell in which the probe holding region is not formed, that is, the fluorescence does not occur.
- the chemical sensor may further include an adhesive layer made of a biomolecular adhesive formed on the probe holding region.
- the user can use an arbitrary probe material by adhering it to the adhesive layer.
- the chemical sensor may further include a probe material layer made of a probe material adhered on the adhesive layer.
- the target material can be detected by bringing the measurement sample containing the target material into contact with the chemical sensor.
- the probe material may be DNA, RNA, protein or antigen.
- This configuration makes it possible to detect target materials that specifically bind to these probe materials.
- a biomolecule detection apparatus includes a chemical sensor and a signal processing circuit.
- the chemical sensor includes a substrate on which a plurality of photodiodes arranged in a plane are formed, an optical layer that is stacked on the substrate and has a waveguide that guides fluorescence to each of the photodiodes, and the optical layer.
- a probe holding region that can be stacked and hold the probe material has an intermediate layer formed for each waveguide.
- the signal processing circuit processes an output signal of each photodiode of the chemical sensor.
- the fluorescence caused by the binding between the probe material held in the probe holding region and the target material that specifically binds to the probe material is detected by the photodiode.
- the fluorescence since the fluorescence is guided to the photodiode by the waveguide provided for each photodiode, the fluorescence can be detected with high accuracy.
- the signal processing circuit may extract a difference between an output signal of the photodiode provided with the probe holding region and an output signal of the photodiode not provided with the probe holding region as a signal corresponding to fluorescence.
- the light-shielded output signal of the photodiode can be used to define the black level of the photodiode.
- a biomolecule detection method includes a substrate on which a plurality of photodiodes arranged in a plane are formed, and a fluorescent light that is stacked on the substrate and is guided to each of the photodiodes.
- a chemical sensor is prepared that includes an optical layer in which a waveguide is formed, and an intermediate layer in which a probe holding region that is stacked on the optical layer and can hold a probe material is formed for each waveguide.
- An adhesive layer made of a biomolecular adhesive is formed on the probe holding region. Different probe materials are bonded to the adhesive layer to form a probe material layer.
- the measurement target substance is brought into contact with the probe material layer, and the amount of the target material contained in the measurement target substance is combined with the probe material. A substance to be measured that has not bound to the probe material is removed. Fluorescence resulting from the binding between the target material and the probe material is detected by the photodiode.
- the fluorescence caused by the coupling between the target material and the probe material is guided to the photodiode by the waveguide, the fluorescence can be detected with high accuracy.
- the waveguide is surrounded by a reflective surface having light reflectivity, and a spectral filter made of a spectral material that attenuates excitation light and transmits fluorescence is formed in the waveguide.
- a spectral filter made of a spectral material that attenuates excitation light and transmits fluorescence is formed in the waveguide.
- oblique incident light is formed.
- the chemical sensor may be irradiated with excitation light with annular illumination light.
- the chemical sensor may detect changes in the wavelength and brightness of the fluorescence due to the interaction between the probe material and the target material that are fluorescently labeled in advance.
- the chemical sensor may detect fluorescence from a target material that is preliminarily fluorescently bonded to the probe material.
- a fluorescent label may be applied to the combined body of the probe material and the target material, and the fluorescence may be detected by the chemical sensor.
- FIG. 1 is a schematic diagram illustrating a configuration of a biomolecule detection apparatus 1 according to the present embodiment.
- the biomolecule detection apparatus 1 includes a chemical sensor 3 including a plurality of cells 30 arranged on a substrate 2 and a peripheral circuit for driving the chemical sensor 3.
- each cell 30 is provided with one photodiode 21.
- the number and arrangement of the cells 30 are not limited and can be changed as appropriate.
- the cells 30 are arranged in a matrix on the plane of the substrate 2, and the row direction is the vertical direction and the column direction is the horizontal direction.
- the peripheral circuit includes a vertical drive circuit 4, a column signal processing circuit 5, a horizontal drive circuit 6, and a system control circuit 7.
- the photodiode 21 of each cell 30 is connected to the pixel drive line 8 for each row and to the vertical signal line 9 for each column.
- Each pixel drive line 8 is connected to the vertical drive circuit 4, and the vertical signal line 9 is connected to the column signal processing circuit 5.
- the column signal processing circuit 5 is connected to the horizontal driving circuit 6, and the system control circuit 7 is connected to the vertical driving circuit 4, the column signal processing circuit 5 and the horizontal driving circuit 6.
- the peripheral circuit can be arranged at a position where it is stacked in the pixel region, on the opposite side of the substrate 2 or the like.
- the vertical drive circuit 4 is configured by, for example, a shift register, selects the pixel drive line 8, supplies a pulse for driving the photodiode 21 to the selected pixel drive line 8, and drives the photodiode 21 in units of rows. To do. That is, the vertical drive circuit 4 selectively scans each photodiode 21 in the vertical direction sequentially in units of rows. Then, the pixel signal based on the signal charge generated according to the amount of received light in each photodiode 21 is supplied to the column signal processing circuit 5 through the vertical signal line 9 wired perpendicular to the pixel drive line 8.
- the horizontal drive circuit 6 is configured by, for example, a shift register, and sequentially outputs horizontal scanning pulses, thereby selecting each of the column signal processing circuits 5 in order and outputting a pixel signal from each of the column signal processing circuits 5.
- the system control circuit 7 receives the data specifying the input clock and the operation mode, and outputs data such as internal information of the chemical sensor 3. That is, the system control circuit 7 generates a clock signal and a control signal that serve as a reference for operations of the vertical drive circuit 4, the column signal processing circuit 5, and the horizontal drive circuit 6 based on the vertical synchronization signal, the horizontal synchronization signal, and the master clock. Generate. The system control circuit 7 inputs these signals to the vertical drive circuit 4, the column signal processing circuit 5, the horizontal drive circuit 6, and the like.
- the drive circuit that drives each photodiode 21 by the vertical drive circuit 4, the column signal processing circuit 5, the horizontal drive circuit 6, the system control circuit 7, and the pixel circuit provided in the photodiode 21 described later. Is configured.
- FIG. 2 and 3 are schematic views showing one cell 30 of the chemical sensor 3 according to the present embodiment.
- FIG. 2 is a cross-sectional view of the cell 30, and
- FIG. 3 is a perspective view of the cell 30.
- the chemical sensor 3 is configured by laminating a protective insulating layer 31, an optical layer 32, a planarizing layer 33, an intermediate layer 34, an adhesive layer 35, and a probe material layer 36 on a substrate 2. ing.
- the substrate 2 is made of, for example, single crystal silicon, and a principal surface side of the substrate 2 is a light receiving surface, and photodiodes 21 made of impurity regions are two-dimensionally arranged on the surface layer on the light receiving surface side. This photodiode 21 is provided for each cell 30.
- the photodiode 21 may be provided only on one main surface side that is the light receiving surface side in the substrate 2 as illustrated, or may be provided from one main surface side to another main surface side.
- the chemical sensor 3 may have a CMOS (Complementary Metal Oxide Semiconductor) or CCD (Charge Coupled Device) type element structure, and element isolation or floating diffusion, not shown here, may be used as necessary. It is assumed that another impurity region is arranged.
- a gate insulating film, a gate electrode, etc. may be disposed on the substrate 2 provided with the impurity region including the photodiode 21.
- the protective insulating layer 31 is disposed so as to cover the gate insulating film and the gate electrode.
- the pixel circuit including the gate insulating film and the gate electrode may be disposed on the surface of the substrate 2 opposite to the light receiving surface.
- the optical layer 32 is a layer for guiding fluorescence to be described later to the photodiode 21.
- a waveguide 321 is formed in the optical layer 32.
- the waveguide 321 has a structure for guiding fluorescence to each photodiode 21, and is formed toward each photodiode 21.
- the waveguide 321 is formed by forming a through hole in a metal layer 322 made of a light-reflective metal (Al, Cu, etc.), and thus is surrounded by a light-reflective reflective surface. ing.
- the waveguide 321 can have a tapered shape in which the diameter on the photodiode 21 side gradually decreases. As a result, it is possible to focus the fluorescence emitted isotropically on the photodiode 21 while guiding the fluorescence to the waveguide in a wide range.
- a spectral filter 323 made of a spectral material is provided inside the waveguide 321.
- the spectral material is a material that attenuates excitation light and transmits fluorescence, and can be appropriately selected according to the wavelength of excitation light or fluorescence.
- a color filter that transmits a predetermined wavelength band of fluorescence can be used.
- a color filter using a pigment or a dye is suitable.
- the metal layer 322 and the spectral filter 323 form a cladding layer that reflects light and a core layer that propagates light.
- the excitation light propagates while absorbing and attenuating, and the fluorescent light propagates to the PD with low loss while being reflected by the cladding layer.
- fluorescence from biomaterials is isotropic, fluorescence having an angle component greater than the critical angle cannot propagate in a waveguide structure using a difference in refractive index such as an optical fiber, and sufficient detection signal intensity is obtained. Not only is it not obtained, but a fatal problem occurs as a chemical sensor that admixes adjacent pixels (crosstalk) and causes detection noise.
- a metal material such as Al or Cu is used as the material of the cladding layer, and the angle component that can be captured is increased and the color mixture to the adjacent pixels is greatly reduced.
- the planarization layer 33 is a layer for planarizing the optical layer 32.
- the upper surface of the optical layer 32 may have irregularities when the spectral filter 51 is formed, and the planarization layer 33 is a layer for planarizing the irregularities to form an upper layer (intermediate layer 34, etc.). It is.
- the material of the flattening layer 33 is preferably an organic material that is transparent with respect to the wavelength of fluorescent light and has high adhesion to the metal material and the spectroscopic material constituting the optical layer 32.
- the intermediate layer 34 is a layer for selectively forming the adhesive layer 35 and the probe material layer 36 formed thereon as a region. Specifically, a surface treatment can be performed so that the adhesive layer 35 is formed only in a predetermined region of the intermediate layer 34 by a process described later.
- such an intermediate layer 34 can be made of silicon oxide or nitrogen silicon in which a region where the adhesive layer 35 is to be formed (hereinafter referred to as a probe holding region) is made hydrophilic and the other region is made hydrophobic. .
- the probe holding region is preferably formed directly above each photodiode 21 with a size smaller than the diameter of the waveguide 321, that is, the size of the entire probe holding region facing the waveguide 321. . Thereby, the fluorescence generated from the probe material layer 36 can be efficiently incident on the waveguide 321.
- the adhesive layer 35 is a layer for holding the probe material layer 36. As described above, the adhesive layer 35 is laminated only on the probe holding region of the intermediate layer 34, and holds the probe material layer 36 only on the probe holding region.
- the adhesive layer 35 can be made of a biomolecule adhesive that selectively adsorbs only to the probe holding region and to which the probe material (biomolecule) can adhere. Examples include fibronectin.
- the probe material layer 36 is made of a probe material appropriately selected from biomolecules (DNA, RNA, protein, various antigens, etc.) according to the target material to be detected.
- the probe material layer 36 is formed by adhering the probe material to the above-described adhesive layer 35, that is, only on the probe holding region where the adhesive layer 35 is formed.
- the chemical sensor 3 includes the cell 30 having the above structure.
- the chemical sensor 3 may be supplied to the user without the probe material layer 36 being provided. In this case, the user can use an arbitrary probe material by bonding it to each adhesive layer 35.
- the chemical sensor 3 may be supplied to the user in a state where the adhesive layer 35 and the probe material layer 36 are not provided.
- the user can use any biomolecular adhesive and probe material.
- the intermediate layer 34 is subjected to the above surface treatment, the user can adsorb the adhesive only to the probe holding region, that is, the probe material can be bonded only to the probe holding region. it can.
- FIGS. 4 to 7 are schematic diagrams showing a method for producing the chemical sensor 3.
- one cell 30 is shown, but in practice, a plurality of cells 30 arranged on the substrate 2 can be formed simultaneously.
- a photodiode 21 is formed on a substrate 2 made of single crystal silicon or the like.
- the photodiode 21 can be formed by forming an impurity region by ion implantation using a mask and heat treatment, and further forming a gate insulating film, a gate electrode, and the like (not shown) inside the substrate 2.
- the photodiodes 21 can be arranged in a matrix on the substrate 2 as described above.
- a protective insulating layer 31 is formed on the substrate 2 on which the photodiode 21 is formed by an arbitrary film forming method. Further, as shown in FIG. 4C, a metal layer 322 is formed on the protective insulating layer 31.
- the metal layer 322 can be formed by, for example, a sputtering method.
- the metal layer 322 located above each photodiode 21 is patterned to form an opening 324 to be a waveguide 321.
- the metal layer 322 can be patterned by lithography and dry etching, for example.
- the spectral filter 323 is formed by filling the opening 324 with a spectral material. At this time, unevenness may occur on the upper surface of the spectral filter 323.
- a waveguide 321 is formed by the formation of the spectral filter 323 in the opening 324.
- a planarizing material is coated on the spectral filter 323, and a baking process is performed as necessary to form the planarizing layer 33.
- the intermediate layer 34 is formed on the planarizing layer 33.
- the intermediate layer 34 is formed by laminating a material such as silicon oxide on the planarizing layer 33 as shown in FIG. 6A and laminating a photosensitive silane coupling agent as shown in FIG. 6B. can do.
- the intermediate layer 34 is partially irradiated with ultraviolet rays through a photomask to form a probe holding region 34a.
- the photosensitive silane coupling agent is denatured by being irradiated with ultraviolet rays and becomes hydrophilic. Accordingly, by selectively irradiating the region where the probe holding region 34a is desired to be set by photolithography, only the region can be made hydrophilic and the other regions can be made hydrophobic.
- the probe holding region 34 a is formed directly above each photodiode 21 with a size smaller than the diameter of the waveguide 321, that is, a size in which one entire probe holding region faces the waveguide 321. can do.
- the chemical sensor 3 can be produced.
- an adhesive layer 35 is formed on the probe holding region 34 a of the intermediate layer 34. Since the probe holding region 34a is hydrophilic as described above, the biomolecule adhesive remains only in the probe holding region 34a by bringing a hydrophilic biomolecule adhesive (fibronectin or the like) into contact therewith.
- the chemical sensor 3 can be created as described above.
- the chemical sensor 3 is constituted by the cell 30, but the chemical sensor 3 can also be constituted by arranging a reference cell.
- the cell 30 having the above-described configuration is referred to as a detection cell 30a, and the chemical sensor 3 is configured by a reference cell 30b and a black cell 30c.
- FIG. 9 is a view of the chemical sensor 3 as viewed from the upper surface side (probe material layer 36 side).
- the chemical sensor 3 includes a detection cell 30a, a reference cell 30b, and a black cell 30c.
- the detection cell 30a has the above-described configuration, and the number of arrangement thereof is arbitrary, but a megapixel class is preferable.
- the reference cell 30b is one in which the adhesive layer 35 and the probe material layer 36 are not formed in the structure of the detection cell 30a described above.
- the reference cell 30b can be arranged, for example, around the detection cell 30a.
- the probe holding region where the adhesive layer 35 is formed can be arbitrarily set by the surface treatment of the intermediate layer 34, when forming the reference cell 30b, a pixel that does not form the probe holding region should be created. That's fine.
- the detection cell 30a is irradiated with excitation light, and fluorescence is generated in the probe material layer 36 due to the coupling between the probe material and the target material.
- the excitation light is shielded by the spectral filter 323 of the waveguide 321, and only the fluorescence reaches the photodiode 21 and is detected.
- the excitation light is not completely shielded by the spectral filter 323 and may be detected by the photodiode 21. For this reason, the leakage amount of the excitation light can be detected by the reference cell 30b in which the probe material layer 36 is not formed, and can be used for correcting the detection result of the detection cell 30a.
- the black cell 30 c is such that the opening 324 is not formed in the metal layer 322, that is, the waveguide 321 is completely shielded by the metal layer 322.
- the black cell 30c can be disposed, for example, around the reference cell 30b.
- the black cell 30c is used to define the black level of the photodiode 21 that can be influenced by temperature or the like.
- the chemical sensor 3 can be arranged as described above.
- the arrangement and number of detection cells 30a, reference cells 30b, and black cells 30c are not limited to those shown here, and can be changed as appropriate.
- Biomolecule detection method using chemical sensor A biomolecule detection method using the above-described chemical sensor 3 will be described.
- a probe material layer 36 made of an arbitrary probe material is formed in each detection cell 30a.
- the probe material for example, when DNA is used as the probe material, it is exemplified to use 5′-fluoresceinized DNA. If DNA having a complementary sequence is contained in the measurement data for this 5′-fluoresceinized DNA, a hybridization reaction occurs, and the probe material is derived from single-stranded DNA (ss-DNA). , Double-stranded DNA (ds-DNA).
- the photodiode 21 can detect that the emission wavelength and intensity of the fluorescence change due to the change in the dielectric constant around the fluorescent molecule due to this change.
- DNA not fluorescently labeled is used as the probe material, and 5′-fluoresceinized DNA is used on the sample side.
- DNA having a sequence complementary to DNA as a probe material is contained in the sample, a hybridization reaction occurs and ds-DNA having a fluorescent label is obtained. Fluorescence emission from the fluorescent label can be detected by the photodiode 21.
- DNA that is not fluorescently labeled is used as the probe material, and no fluorescent dye is introduced into the sample side.
- DNA having a sequence complementary to DNA as a probe material is contained in the sample, a hybridization reaction occurs and ds-DNA is obtained.
- the fluorescent labeling is introduced into the ds-DNA part by selectively staining only the ds-DNA and performing the fluorescent labeling using, for example, a PicoGreen double-stranded DNA quantitative reagent manufactured by Molecular Probe. Fluorescence emission from the fluorescent label is detected by the photodiode 21.
- the chemical sensor 3 when the chemical sensor 3 is irradiated with excitation light in a state where the fluorescent label is applied to the probe material, the target material, or the combined body of the probe material and the target material, fluorescence is generated from the fluorescent label, Alternatively, the wavelength / intensity of the fluorescence changes.
- the irradiation with the excitation light is preferably performed as follows.
- FIG. 11 is a schematic diagram showing an example of the shape of the diaphragm 104, and the shaded area is a light shielding portion.
- the aperture shape shown in FIG. 11A is used, but an aperture shape as shown in FIG. 11B can also be used.
- FIG. 12 is a schematic diagram showing the shape of irradiation light.
- Excitation light (laser or halogen light) emitted from the excitation light source 101 is converted into parallel light by a collimator lens 102 and is made uniform by a fly-eye lens (small lens array) 103.
- the light emitted from the fly-eye lens 103 is converted into a ring-shaped secondary light source shape by the diaphragm 104 shown in FIG. 11A and condensed on the chemical sensor 3 by the condenser lens 105.
- the excitation light is irradiated with uniform intensity, illumination shape, and illumination angle regardless of the position on the chemical sensor 3.
- the excitation light when the excitation light is converted into an annular shape by the diaphragm 104, the excitation light enters each cell 30 of the chemical sensor 3 from an oblique direction.
- the oblique light illumination makes the distance that the excitation light passes through the spectral filter 323 longer than when the excitation light enters the cell 30 from the vertical direction, and is sufficiently attenuated by the spectral filter 323. It becomes possible. Therefore, since excitation light intensity can be attenuated and fluorescence intensity can be maintained by using excitation light (oblique incident light) incident obliquely, a high S / N ratio can be obtained.
- the excitation light irradiation method shown in FIG. 10 is particularly effective when the chemical sensor 3 according to this embodiment is used.
- the incident light to the chemical sensor 3 is not limited to the annular shape, but can be an arbitrary oblique incident shape, and can be adjusted according to the shape of the diaphragm 104.
- the target material can be detected by detecting the fluorescence generated by irradiating the chemical sensor 3 with the excitation light by the photodiode 21.
- the signal processing operation by the biomolecule detection apparatus 1 at this time will be described by taking the chemical sensor 3 shown in FIG. 4 as an example.
- the output signal of the photodiode 21 of a specific cell 30 is a signal Is
- the output signal of the photodiode 21 of the reference cell 30b is a signal Iref
- the output signal of the photodiode 21 of the black cell 30c is a signal Ib.
- the light component Ifl for each cell 30 can be obtained with high accuracy.
- the fluorescence caused by the binding of the target material that specifically binds to the probe material is guided to the photodiode 21 by the waveguide 321, so that the fluorescence can be detected with high accuracy. It becomes. Furthermore, by assuming that the waveguide 321 is surrounded by a reflecting surface having light reflectivity, the fluorescence incident on the waveguide 321 is reflected by the reflecting surface, and the fluorescence can be detected regardless of the incident angle. At the same time, it is possible to prevent the fluorescent light from reaching the adjacent cell 30 by the reflecting surface.
- the waveguide 321 has a tapered shape in which the diameter gradually decreases from the intermediate layer 34 side to the photodiode 21 side, the isotropically emitted fluorescence is guided to the waveguide 321 in a wide range, and The light can be condensed on the diode 21. Further, by forming a spectral filter 323 made of a spectral material that attenuates excitation light and transmits fluorescence in the waveguide 321, it is possible to prevent the excitation light from reaching the photodiode 21.
- the probe holding region 34 a by forming the probe holding region 34 a to a size opposite to the waveguide 321, it is possible to guide most of the fluorescence to the waveguide 321 because the fluorescence generation region is smaller than the entrance of the waveguide 321. At the same time, it is possible to prevent fluorescence from reaching the adjacent cells 30. Further, by forming the probe holding region 34a only in a part of the cells 30, the cell 30 in which the probe holding region 34a is not formed is used as a reference for the leaked excitation light and used for correcting the fluorescence detection signal. It becomes possible.
- a biomolecule detection apparatus according to a second embodiment of the present technology will be described.
- the pixel arrangement of the chemical sensor is different from that of the first embodiment, but the other configuration is the same as that of the first embodiment, and thus the description thereof is omitted.
- FIG. 13 is a schematic view of the chemical sensor 203 according to the present embodiment as viewed from the upper surface side.
- the chemical sensor 203 can be composed of a detection cell 30a, a reference cell 30b, and a black cell 30c.
- the configuration of each of the detection cell 30a, the reference cell 30b, and the black cell 30c is the same as that of the first embodiment.
- the reference cell 30b is arranged between the detection cells 30a, and the detection cell 30a is detected.
- the cells 30a are arranged so as not to be adjacent to each other.
- the distance between the adjacent detection cells 30a becomes 2 pixel pitch (XY direction) and 2 ⁇ 2 pixel pitch (diagonal), and the crosstalk to the adjacent detection cell 30a due to the fluorescence from the detection cell 30a is greatly increased. It is possible to reduce the detection accuracy.
- a reference region R including reference cells 30b sufficiently separated from the detection cell 30a is provided, and only an output signal from these reference cells 30b is used as a reference signal (Iref). Is also possible.
- the arrangement and number of reference regions R can be changed as appropriate.
- the detection cells 30a are separated from each other, and the reference cells 30b are arranged therebetween, thereby preventing crosstalk between adjacent detection cells 30a and detecting biomolecules with higher accuracy. It becomes possible to do.
- a biomolecule detection device according to a third embodiment of the present technology will be described.
- the element structure and pixel arrangement of the chemical sensor are different from those in the first embodiment, but the other configurations are the same as those in the first embodiment, and thus the description thereof is omitted.
- FIG. 14 is a schematic view of the chemical sensor 303 according to the present embodiment as viewed from the upper surface side.
- the chemical sensor 303 can be composed of a detection cell 30a, a reference cell 30b, and a black cell 30c.
- the detection cell 30a is a color filter in which the spectral filter 323 transmits only a predetermined band of the fluorescence wavelength, and cuts off the cutoff wavelength (shields the shorter wavelength side than ⁇ n and transmits the longer wavelength side from ⁇ n. 4 types of color filters are used. That is, the chemical sensor 303 includes a first detection cell 30a 1 having a color filter of the first color ( ⁇ 1), a second detection cell 30a 2 having a color filter of the second color ( ⁇ 2), and a third color ( ⁇ 3).
- detection cells 30a that is, a third detection cell 30a 2 having a color filter of 4 and a fourth detection cell 30a 4 having a color filter of a fourth color ( ⁇ 4) are used.
- the types (colors) of the color filters are not limited to four, and may be three or less or five or more.
- the first detection cell 30a 1 is adjacent only to the second detection cell 30a 2 , the third detection cell 30a 3, and the fourth detection cell 30a 4, and not adjacent to the first detection cell 30a 1.
- the second detection cell 30a 2 is adjacent only to the second detection cell 30a 2 , the third detection cell 30a 3, and the fourth detection cell 30a 4, and not adjacent to the first detection cell 30a 1.
- the wavelength tunable laser or the bandpass filter may be operated in time series so as to emit ⁇ 1, ⁇ 2, ⁇ 3, and ⁇ 4 in order. May be irradiated simultaneously.
- the detection system as a whole can be detected with multiple wavelengths, not to mention the effect on cost, enabling more versatile analysis and analysis with a common sample, enabling highly reliable analysis. It has the effect of becoming.
- the present technology is not limited to the above embodiments, and can be changed without departing from the gist of the present technology.
- this technique can also take the following structures.
- a chemical sensor comprising:
- a chemical sensor comprising a spectral filter made of a spectral material that attenuates excitation light and transmits fluorescence in the waveguide.
- the spectral filter is a color sensor that transmits a part of the fluorescence wavelength.
- the probe holding region is a chemical sensor formed to have a size facing the waveguide.
- a chemical sensor according to any one of (1) to (9) above, A chemical sensor further comprising a probe material layer made of a probe material adhered on the adhesive layer.
- a chemical sensor having a probe holding region capable of being held and an intermediate layer formed for each of the waveguides;
- a biomolecule detection apparatus comprising: a signal processing circuit that processes an output signal of each photodiode of the chemical sensor.
- the signal processing circuit extracts a difference between an output signal of the photodiode provided with the probe holding region and an output signal of the photodiode not provided with the probe holding region as a signal corresponding to fluorescence.
- the biomolecule detection apparatus is a biomolecule detection device that uses a light-shielded output signal of a photodiode as a reference signal.
- the biomolecule detection method according to (15) above The waveguide is surrounded by a reflective surface having light reflectivity, A spectral filter made of a spectral material that attenuates excitation light and transmits fluorescence is formed in the waveguide.
- the chemical sensor detects a change in wavelength and brightness of fluorescence due to the interaction between the probe material and the target material that are fluorescently labeled in advance.
- biomolecule detection method according to any one of (15) to (17) above, In the step of detecting the fluorescence, a biomolecule detection method in which the chemical sensor detects fluorescence from a target material that is preliminarily fluorescently bonded to the probe material.
- biomolecule detection method according to any one of (15) to (18) above, In the step of detecting fluorescence, a biomolecule detection method in which fluorescence labeling is performed on a conjugate of the probe material and the target material, and the fluorescence is detected by the chemical sensor.
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Abstract
Description
上記基板は、平面状に配列する複数のフォトダイオードが形成されている。
上記光学層は、上記基板に積層され、蛍光を上記フォトダイオードのそれぞれに導く導波路が形成されている。
上記中間層は、光学層に積層され、プローブ材料を保持することが可能なプローブ保持領域が上記導波路毎に形成されている。
上記ケミカルセンサは、平面状に配列する複数のフォトダイオードが形成された基板と、上記基板に積層され、蛍光を上記フォトダイオードのそれぞれに導く導波路が形成された光学層と、上記光学層に積層されプローブ材料を保持することが可能なプローブ保持領域が上記導波路毎に形成された中間層と有する。
上記信号処理回路は、上記ケミカルセンサのそれぞれの上記フォトダイオードの出力信号を処理する。
上記プローブ保持領域に生体分子接着剤からなる接着剤層を形成する。
上記接着剤層に、それぞれ異なるプローブ材料を接着してプローブ材料層を形成する。
測定対象物質を上記プローブ材料層に接触させて、上記測定対象物質に含まれたターゲット材量を上記プローブ材料と結合させる。
上記プローブ材料と結合しなかった測定対象物質を除去する。
上記ターゲット材料と上記プローブ材料の結合に起因する蛍光を上記フォトダイオードによって検出する。
本技術の第1の実施形態に係る生体分子検出装置について説明する。
図1は、本実施形態に係る生体分子検出装置1の構成を示す模式図である。同図に示すように、生体分子検出装置1は、基板2上に配列された複数のセル30からなるケミカルセンサ3と、ケミカルセンサ3を駆動するための周辺回路から構成されている。詳細は後述するが、各セル30にはそれぞれひとつのフォトダイオード21が設けられている。
上記ケミカルセンサ3の構成について説明する。
上記のような構成を有するケミカルセンサ3の作成方法について説明する。
上記のような構成を有するケミカルセンサ3の分光特性について説明する。下記の[表1]に示すパラメータを有するケミカルセンサ3について数値計算を行い、フォトダイオード21表層の電磁場強度を指標として、信号成分(蛍光強度)とノイズ成分(励起光)の評価をした。なお、プローブ材料及びターゲット材料の厚さはナノオーダの膜厚であるため計算モデルには反映されていない。
上記のようにケミカルセンサ3はセル30によって構成されるが、参照用のセルを配置することによってケミカルセンサ3を構成することも可能である。以下、上述した構成を有するセル30を検出セル30aとし、ケミカルセンサ3はこの他に参照セル30b及び黒色セル30cによって構成されるものとする。
上述したケミカルセンサ3を用いた生体分子検出方法について説明する。ケミカルセンサ3は、各検出セル30aに任意のプローブ材料からなるプローブ材料層36が形成されているものとする。
上記のように、ケミカルセンサ3に励起光を照射することによって生じる蛍光を、フォトダイオード21によって検出することによって、ターゲット材料を検出することができる。この際の生体分子検出装置1による信号処理動作を図4に示したケミカルセンサ3を例にとって説明する。
本技術の第2の実施形態に係る生体分子検出装置について説明する。なお、本実施形態においては、ケミカルセンサの画素配置が第1の実施形態と異なるが、その他の構成については第1の実施形態と同様であるため、説明を省略する。
図13は、本実施形態に係るケミカルセンサ203を上面側からみた模式図である。同図に示すように、ケミカルセンサ203は、検出セル30a、参照セル30b及び黒色セル30cによって構成されるものとすることができる。検出セル30a、参照セル30b及び黒色セル30cのそれぞれの構成は、第1の実施形態と同様であるが、本実施形態においては、各検出セル30aの間にも参照セル30bが配置され、検出セル30aは互いに隣接しないように配置されている。
本技術の第3の実施形態に係る生体分子検出装置について説明する。なお、本実施形態においては、ケミカルセンサの素子構造及び画素配置が第1の実施形態と異なるが、その他の構成については第1の実施形態と同様であるため、説明を省略する。
図14は、本実施形態に係るケミカルセンサ303を上面側からみた模式図である。同図に示すように、ケミカルセンサ303は、検出セル30a、参照セル30b及び黒色セル30cによって構成されるものとすることができる。
平面状に配列する複数のフォトダイオードが形成された基板と、
上記基板に積層され、蛍光を上記フォトダイオードのそれぞれに導く導波路が形成された光学層と、
上記光学層に積層され、プローブ材料を保持することが可能なプローブ保持領域が上記導波路毎に形成された中間層と、
を具備するケミカルセンサ。
上記(1)に記載のケミカルセンサであって、
上記導波路は、光反射性を有する反射面によって囲まれている
ケミカルセンサ。
上記(1)又は(2)に記載のケミカルセンサであって、
上記導波路は、上記中間層側から上記フォトダイオード側に径が漸次小さくなるテーパー形状を有する
ケミカルセンサ。
上記(1)から(3)のうちいずれか一つに記載のケミカルセンサであって、
上記導波路内には励起光を減衰させ、蛍光を透過させる分光材料からなる分光フィルタが形成されている
ケミカルセンサ。
上記(1)から(4)のうちいずれか一つに記載のケミカルセンサであって、
上記分光フィルタは、蛍光の波長の一部を透過させるカラーフィルタである
ケミカルセンサ。
上記(1)から(5)のうちいずれか一つに記載のケミカルセンサであって、
上記カラーフィルタは、隣接する上記導波路に形成されたものとは異なる透過波長を有する
ケミカルセンサ。
上記(1)から(6)のうちいずれか一つに記載のケミカルセンサであって、
上記プローブ保持領域は、上記導波路に対向する大きさに形成されている
ケミカルセンサ。
上記(1)から(7)のうちいずれか一つに記載のケミカルセンサであって、
上記プローブ保持領域は、一部の上記導波路について形成されている
ケミカルセンサ。
上記(1)から(8)のうちいずれか一つに記載のケミカルセンサであって、
上記プローブ保持領域上に形成された生体分子接着剤からなる接着剤層
をさらに具備するケミカルセンサ。
上記(1)から(9)のうちいずれか一つに記載のケミカルセンサであって、
上記接着剤層上に接着されたプローブ材料からなるプローブ材料層をさらに具備する
ケミカルセンサ。
上記(1)から(10)のうちいずれか一つに記載のケミカルセンサであって、
上記プローブ材料は、DNA、RNA、タンパク質又は抗原である
ケミカルセンサ。
平面状に配列する複数のフォトダイオードが形成された基板と、上記基板に積層され、蛍光を上記フォトダイオードのそれぞれに導く導波路が形成された光学層と、上記光学層に積層されプローブ材料を保持することが可能なプローブ保持領域が上記導波路毎に形成された中間層と有するケミカルセンサと、
上記ケミカルセンサのそれぞれの上記フォトダイオードの出力信号を処理する信号処理回路と
を具備する生体分子検出装置。
上記(12)に記載の生体分子検出装置であって、
上記信号処理回路は、上記プローブ保持領域が設けられた上記フォトダイオードと、上記プローブ保持領域が設けられていない上記フォトダイオードの出力信号の差分を蛍光に相当する信号として抽出する
生体分子検出装置。
上記(12)又は(13)に記載の生体分子検出装置であって、
上記信号処理回路は、遮光されたフォトダイオードの出力信号を参照信号とする
生体分子検出装置。
平面状に配列する複数のフォトダイオードが形成された基板と、上記基板に積層され蛍光を上記フォトダイオードのそれぞれに導く導波路が形成された光学層と、上記光学層に積層されプローブ材料を保持することが可能なプローブ保持領域が上記導波路毎に形成された中間層とを有するケミカルセンサを準備し、
上記プローブ保持領域に生体分子接着剤からなる接着剤層を形成し、
上記接着剤層に、それぞれ異なるプローブ材料を接着してプローブ材料層を形成し、
測定対象物質を上記プローブ材料層に接触させて、上記測定対象物質に含まれたターゲット材量を上記プローブ材料と結合させ、
上記プローブ材料と結合しなかった測定対象物質を除去し、
上記ターゲット材料と上記プローブ材料の結合に起因する蛍光を上記フォトダイオードによって検出する
生体分子検出方法。
上記(15)に記載の生体分子検出方法であって、
上記導波路は、光反射性を有する反射面によって囲まれ、
上記導波路内には励起光を減衰させ、蛍光を透過させる分光材料からなる分光フィルタが形成され、
上記蛍光を検出するステップでは、斜入射光又は輪帯照明光によって励起光を上記ケミカルセンサに照射する
生体分子検出方法。
上記(15)又は(16)に記載の生体分子検出方法であって、
上記蛍光を検出するステップでは、予め蛍光標識されている上記プローブ材料と上記ターゲット材料の相互作用による蛍光の波長及び輝度の変化を上記ケミカルセンサによって検出する
生体分子検出方法。
上記(15)から(17)のうちいずれか一つに記載の生体分子検出方法であって、
上記蛍光を検出するステップでは、上記プローブ材料と結合した予め蛍光標識されているターゲット材料による蛍光を上記ケミカルセンサによって検出する
生体分子検出方法。
上記(15)から(18)のうちいずれか一つに記載の生体分子検出方法であって、
上記蛍光を検出するステップでは、上記プローブ材料と上記ターゲット材料の結合体に対して蛍光標識を実施し、その蛍光を上記ケミカルセンサによって検出する
生体分子検出方法。
2…基板
3…ケミカルセンサ
21…フォトダイオード
31…保護絶縁層
32…光学層
33…平坦化層
34…中間層
35…接着剤層
36…プローブ材料層
Claims (19)
- 平面状に配列する複数のフォトダイオードが形成された基板と、
前記基板に積層され、蛍光を前記フォトダイオードのそれぞれに導く導波路が形成された光学層と、
前記光学層に積層され、プローブ材料を保持することが可能なプローブ保持領域が前記導波路毎に形成された中間層と
を具備するケミカルセンサ。 - 請求項1に記載のケミカルセンサであって、
前記導波路は、光反射性を有する反射面によって囲まれている
ケミカルセンサ。 - 請求項2に記載のケミカルセンサであって、
前記導波路は、前記中間層側から前記フォトダイオード側に径が漸次小さくなるテーパー形状を有する
ケミカルセンサ。 - 請求項2に記載のケミカルセンサであって、
前記導波路内には励起光を減衰させ、蛍光を透過させる分光材料からなる分光フィルタが形成されている
ケミカルセンサ。 - 請求項4に記載のケミカルセンサであって、
前記分光フィルタは、蛍光の波長の一部を透過させるカラーフィルタである
ケミカルセンサ。 - 請求項5に記載のケミカルセンサであって、
前記カラーフィルタは、隣接する前記導波路に形成されたものとは異なる透過波長を有する
ケミカルセンサ。 - 請求項2に記載のケミカルセンサであって、
前記プローブ保持領域は、前記導波路に対向する大きさに形成されている
ケミカルセンサ。 - 請求項7に記載のケミカルセンサであって、
前記プローブ保持領域は、一部の前記導波路について形成されている
ケミカルセンサ。 - 請求項2に記載のケミカルセンサであって、
前記プローブ保持領域上に形成された生体分子接着剤からなる接着剤層
をさらに具備するケミカルセンサ。 - 請求項9に記載のケミカルセンサであって、
前記接着剤層上に接着されたプローブ材料からなるプローブ材料層をさらに具備する
ケミカルセンサ。 - 請求項10に記載のケミカルセンサであって、
前記プローブ材料は、DNA、RNA、タンパク質又は抗原である
ケミカルセンサ。 - 平面状に配列する複数のフォトダイオードが形成された基板と、前記基板に積層され、蛍光を前記フォトダイオードのそれぞれに導く導波路が形成された光学層と、前記光学層に積層されプローブ材料を保持することが可能なプローブ保持領域が前記導波路毎に形成された中間層と有するケミカルセンサと、
前記ケミカルセンサのそれぞれの前記フォトダイオードの出力信号を処理する信号処理回路と
を具備する生体分子検出装置。 - 請求項12に記載の生体分子検出装置であって、
前記信号処理回路は、前記プローブ保持領域が設けられた前記フォトダイオードと、前記プローブ保持領域が設けられていない前記フォトダイオードの出力信号の差分を蛍光に相当する信号として抽出する
生体分子検出装置。 - 請求項12に記載の生体分子検出装置であって、
前記信号処理回路は、遮光されたフォトダイオードの出力信号を参照信号とする
生体分子検出装置。 - 平面状に配列する複数のフォトダイオードが形成された基板と、前記基板に積層され蛍光を前記フォトダイオードのそれぞれに導く導波路が形成された光学層と、前記光学層に積層されプローブ材料を保持することが可能なプローブ保持領域が前記導波路毎に形成された中間層とを有するケミカルセンサを準備し、
前記プローブ保持領域に生体分子接着剤からなる接着剤層を形成し、
前記接着剤層に、それぞれ異なるプローブ材料を接着してプローブ材料層を形成し、
測定対象物質を前記プローブ材料層に接触させて、前記測定対象物質に含まれたターゲット材量を前記プローブ材料と結合させ、
前記プローブ材料と結合しなかった測定対象物質を除去し、
前記ターゲット材料と前記プローブ材料の結合に起因する蛍光を前記フォトダイオードによって検出する
生体分子検出方法。 - 請求項15に記載の生体分子検出方法であって、
前記導波路は、光反射性を有する反射面によって囲まれ、
前記導波路内には励起光を減衰させ、蛍光を透過させる分光材料からなる分光フィルタが形成され、
前記蛍光を検出するステップでは、斜入射光又は輪帯照明光によって励起光を前記ケミカルセンサに照射する
生体分子検出方法。 - 請求項16に記載の生体分子検出方法であって、
前記蛍光を検出するステップでは、予め蛍光標識されている前記プローブ材料と前記ターゲット材料の相互作用による蛍光の波長及び輝度の変化を前記ケミカルセンサによって検出する
生体分子検出方法。 - 請求項16に記載の生体分子検出方法であって、
前記蛍光を検出するステップでは、前記プローブ材料と結合した予め蛍光標識されているターゲット材料による蛍光を前記ケミカルセンサによって検出する
生体分子検出方法。 - 請求項16に記載の生体分子検出方法であって、
前記蛍光を検出するステップでは、前記プローブ材料と前記ターゲット材料の結合体に対して蛍光標識を実施し、その蛍光を前記ケミカルセンサによって検出する
生体分子検出方法。
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| US14/352,592 US20140256057A1 (en) | 2011-10-24 | 2012-10-11 | Chemical sensor, biomolecule detection apparatus, and biomolecule detection method |
| KR1020147009785A KR20140068188A (ko) | 2011-10-24 | 2012-10-11 | 케미컬 센서, 생체분자 검출 장치 및 생체분자 검출 방법 |
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| CN103874916A (zh) | 2014-06-18 |
| TW201326816A (zh) | 2013-07-01 |
| KR20140068188A (ko) | 2014-06-05 |
| JP2013092393A (ja) | 2013-05-16 |
| EP2772751A1 (en) | 2014-09-03 |
| TWI521205B (zh) | 2016-02-11 |
| US20140256057A1 (en) | 2014-09-11 |
| EP2772751B1 (en) | 2021-05-19 |
| EP2772751A4 (en) | 2015-06-10 |
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