CN1715874A - High-efficiency and high-sensitivity biochemical molecule detection method - Google Patents
High-efficiency and high-sensitivity biochemical molecule detection method Download PDFInfo
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- CN1715874A CN1715874A CN 200510012232 CN200510012232A CN1715874A CN 1715874 A CN1715874 A CN 1715874A CN 200510012232 CN200510012232 CN 200510012232 CN 200510012232 A CN200510012232 A CN 200510012232A CN 1715874 A CN1715874 A CN 1715874A
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Abstract
A high-efficiency and high-sensitivity biochemical molecule detection method is characterized in that when a biomolecule liquid passes through a metal micro-nano structure, part of biomolecules are attached to the surface of the metal micro-nano structure, and the redundant biomolecule liquid flows to a waste liquid recovery tank; the light source is coupled into the optical fiber and then irradiates the metal micro-nano structure with the surface attached with the biomolecules to generate surface plasma waves, and when light is under the condition that the wave vector component of the surface of the sensing unit is matched with the wave vector of the surface plasma, the resonance causes the energy loss of reflected light or transmitted light, which is an obvious valley in a reflection spectrum or a transmission spectrum; the reflection spectrum or the transmission spectrum is imaged on the CCD after passing through the spectrometer, and the CCD converts the optical signal into an electric signal and sends the electric signal into a computer processing system for analysis. The invention provides a biochemical molecule detection method which is efficient, high in sensitivity, accurate, convenient, rapid and economical, and can be used in the fields of DNA molecule, protein calibration and identification, drug delivery, molecular devices, virus detection, bacteria detection, micro-tissue diagnosis, active therapy and the like.
Description
Technical field
The present invention relates to a kind of biochemical molecular detecting method, particularly a kind of efficient, high sensitivity, accurately, easily and fast, economic biochemical molecular detecting method.
Background technology
Along with improving constantly of living standards of the people, people have higher requirement to clinical diagnosis and the monitoring and the processing of biochemical compositions such as biomedicine, judicial expertise, food hygiene product supervision analysis, drug development, industry and mining field toxic gas.Traditional biochemical molecular detection method mainly is to use radioactive isotope, enzyme or fluorescence etc. as marker, there is the low shortcoming of security and poor stability, efficient and sensitivity, can not satisfy the fast demand of (so that handling and control danger in real time), sensitive (so that surveying extremely toxic substance of trace), special efficacy (getting rid of the interference and the pollution of non-pathogenic composition), urgent wish development high sensitivity of new generation, efficiently, accurately, easily and fast, economic biochemical molecular detecting method and technology.
Summary of the invention
The technical issues that need to address of the present invention are: the deficiency that overcomes above-mentioned technology, provide a kind of efficient, high sensitivity, accurately, easily and fast, economic biochemical molecular detecting method, the metal micro-nanostructure that it has biomolecule with white light or monochromatic light to the surface shines the generation surface plasma, cause the absorption and the scattering of laser emission energy, the variation identification biomolecule of the absorption spectrum of utilization reflected light or transmitted light.
Technical solution of the present invention is: efficient, high sensitivity biochemical molecular detecting method, its characteristics are: utilize the metal micro-nanostructure that white light or monochromatic light have biomolecule to the surface to excite the generation surface plasma, the variation identification biomolecule of the absorption spectrum of utilization reflected light or transmitted light specifically comprises the following steps:
(1) biomolecule liquid is by metal micro-nanostructure the time, and the part biological molecule can be attached to the surface of metal micro-nanostructure, and unnecessary biomolecule flow of liquid is toward the waste liquid recovery pond;
(.2) light source is coupled in the optical fiber and goes, shine the surface then and produce surface plasma wave with on the metal micro-nanostructure of biomolecule, when light under the condition of the wave vector coupling of the wave vector component on sensing unit surface and surface plasma, resonance causes the energy loss of reflected light or transmitted light, and this is a tangible low ebb in reflectance spectrum or transmitted spectrum;
(3) reflectance spectrum or transmitted spectrum are converted to electric signal by CCD with light signal and send into computer processing system analysis through being imaged on behind the spectrometer on the CCD.
Principle of the present invention: light source is coupled in the optical fiber and goes, shining surface attachment then has on the metal micro-nanostructure of biomolecule and produces surface plasma wave, its attenuation length only has hundreds of nanometers, when light under the condition of the wave vector coupling of the wave vector component on sensing unit surface and surface plasma, resonance causes the energy loss in reflected light or the transmitted light, if light source is a white light, by the detectable biomolecule of the variation of absorption spectrum.If light source is a monochromatic light, a tangible low ebb is arranged in angle reflectance spectrum or transmission spectrum, the resonance angle depends on the refractive index profile of the interior sample of evanescent wave scope on the sensor surface consumingly.Macromolecular absorption and desorption have changed local indexes of refraction on the sensor surface, making the resonance angle take place one moves, the wave vector of surface plasma changes, when light under the condition of the wave vector coupling of the wave vector component on sensing unit surface and surface plasma, resonance causes the energy loss in reflected light or the transmitted light.
The present invention has following advantage than prior art:
(1) the present invention adopts the surface of metal micro-nanostructure that the plasma sensing unit will be accepted to be integrated on the single sensor with transducing part, it is biologic sensor chip, have that cost is low, volume is little, the efficient advantages of higher, can be used for the control of express-analysis and level process;
(2) the surface plasma sensing unit among the present invention, metal micro-nanostructure can be used to recycling.In contrast, traditional immunoassays comprise the immunosorbent chemical examination that enzyme interrelates, and can only use once basically.
(3) traditional biochemical molecular detection identification mainly is to use radioactive isotope, enzyme or fluorescence etc. as marker, has the low shortcoming of security and poor stability, efficient and sensitivity.The present invention utilizes the good electric magnetic property and the bioaffinity of metal micro-nanostructure that biochemical molecular is detected, and can satisfy the demand of (so that handling and control danger in real time), sensitive (so that surveying the extremely toxic substance of trace), special efficacy (getting rid of the interference and the pollution of non-pathogenic composition) fast.
(4) light source that is used to shine metal micro-nanostructure both can be a white light, also can be monochromatic light; The spectrum that is used for that biomolecule is discerned can be that reflectance spectrum can be a transmitted spectrum also, has increased the more freedom degree.
So the present invention can realize new biochemical sensitive Detection Techniques, for establishing new technical foundation in fields such as dna molecular, protein demarcation and identification, drug delivery, molecular device, virus detection, bacterium detection, microstructure diagnosis and active treatment.
Description of drawings
Fig. 1 is for realizing the theory diagram of biochemical molecular pick-up unit of the present invention;
The laser optical path synoptic diagram of Fig. 2 for realizing that biochemical molecular of the present invention detects.
Embodiment
As shown in Figure 1, biomolecule liquid is by metal micro-nanostructure (biochip sensor) time, and the part biological molecule can be attached to the surface of metal micro-nanostructure, and unnecessary biomolecule flow of liquid is toward the waste liquid recovery pond; Light source is coupled in the optical fiber goes, shining surface attachment then has on the metal micro-nanostructure of biomolecule and produces surface plasma wave, when light under the condition of the wave vector coupling of the wave vector component on sensing unit surface and surface plasma, resonance causes reflected light or transmitted light, energy loss as shown in Figure 2, this is a tangible low ebb in reflectance spectrum or transmitted spectrum; Reflectance spectrum or transmitted spectrum are converted to electric signal by CCD with light signal and send into computer processing system analysis through being imaged on behind the spectrometer on the CCD.
If light source is a white light, by the detectable biomolecule of the variation of absorption spectrum.If light source is a monochromatic light, the resonance angle depends on the refractive index profile of the interior sample of evanescent wave scope on the sensor surface consumingly.Metal micro-nanostructure is that macromolecular absorption and desorption have changed local indexes of refraction on the biologic sensor chip surface, makes the resonance angle take place one and moves, and this moves relevant with the kind of biochemical molecular.
Metal micro-nano structure is a sequential 2 D metal nanoparticle array, and the size in nano particle and cycle has determined the frequency of surface plasma wave vector.This metal Nano structure can adopt the nanosphere etching method to make, its manufacturing process is: at first self assembly forms two-dimensional colloidal crystal on substrate, it is the nano-colloid ball is arranged formation in order according to certain rule at two-dimensional directional structure, and, remove the sequential 2 D array that mask obtains being deposited on the metal nanoparticle on the substrate at last as mask deposit metallic material (as gold, silver) thereon.The spacing of the controlled amount system nano particle by colloidal spheres, the volume of the element may command nano particles by depositing different amounts is by the form of subsequent treatment may command nano particle.
CCD is converted to electric signal with light signal and sends into computing machine, can obtain the variation relation curve of light intensity and wavelength (if light source is a white light) or incident angle (if light source is a monochromatic light), if light is in the wave vector component on the sensing unit surface wave vector coupling with surface plasma, resonance will cause reflected light or the transmitted light energy loss in resonant wavelength (if light source is a white light) or resonance angle (is monochromatic light as if light source).
Claims (4)
1, a kind of efficient, high sensitivity biochemical molecular detecting method, it is characterized in that: utilize the metal micro-nanostructure that white light or monochromatic light have biomolecule to the surface to excite the generation surface plasma, the variation identification biomolecule of the absorption spectrum of utilization reflected light or transmitted light specifically comprises the following steps:
(1) biomolecule liquid is by metal micro-nanostructure the time, and the part biological molecule can be attached to the surface of metal micro-nanostructure, and unnecessary biomolecule flow of liquid is toward the waste liquid recovery pond;
(2) light source is coupled in the optical fiber and goes, shine the surface then and produce surface plasma wave with on the metal micro-nanostructure of biomolecule, when light under the condition of the wave vector coupling of the wave vector component on sensing unit surface and surface plasma, resonance causes the energy loss of reflected light or transmitted light, and this is a tangible low ebb in reflectance spectrum or transmitted spectrum;
(3) reflectance spectrum or transmitted spectrum are converted to electric signal by CCD with light signal and send into computer processing system analysis through being imaged on behind the spectrometer on the CCD.
2, efficient, high sensitivity biochemical molecular detecting method according to claim 1 is characterized in that: the surface plasma sensing unit will be accepted to be integrated on the single sensor with transducing part, have that cost is low, volume is little, the efficient advantages of higher.
3, efficient, high sensitivity biochemical molecular detecting method according to claim 1 is characterized in that: the light source that is used to shine metal micro-nanostructure both can be a white light, also can be monochromatic light.
4, efficient, high sensitivity biochemical molecular detecting method according to claim 1, it is characterized in that: the spectrum that is used for that biomolecule is discerned can be that reflectance spectrum also can be a transmitted spectrum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510012232XA CN100567955C (en) | 2005-07-21 | 2005-07-21 | Biochemical molecular detection method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510012232XA CN100567955C (en) | 2005-07-21 | 2005-07-21 | Biochemical molecular detection method |
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| CN1715874A true CN1715874A (en) | 2006-01-04 |
| CN100567955C CN100567955C (en) | 2009-12-09 |
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| CNB200510012232XA Expired - Fee Related CN100567955C (en) | 2005-07-21 | 2005-07-21 | Biochemical molecular detection method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519914A (en) * | 2011-12-22 | 2012-06-27 | 中国科学院理化技术研究所 | Wavelength modulation surface plasma resonance detection device based on laser confocal imaging |
| CN112666098A (en) * | 2020-11-06 | 2021-04-16 | 上海市第八人民医院 | Pathogenic pathogen detection system for intestinal infectious disease in summer |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1095543C (en) * | 1998-07-01 | 2002-12-04 | 吉林大学 | All wavelength surface plasma excimer resonance photochemical sensor |
| US6558945B1 (en) * | 1999-03-08 | 2003-05-06 | Aclara Biosciences, Inc. | Method and device for rapid color detection |
| US6366353B1 (en) * | 1999-11-05 | 2002-04-02 | Corning Incorporated | Method to determine the identity of a material in an object |
| US6407395B1 (en) * | 2000-02-29 | 2002-06-18 | The University Of Chicago | Portable biochip scanner device |
| CN1312476C (en) * | 2004-08-27 | 2007-04-25 | 清华大学 | Method and system for detecting biological chip by space phase modulation interference array |
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2005
- 2005-07-21 CN CNB200510012232XA patent/CN100567955C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102519914A (en) * | 2011-12-22 | 2012-06-27 | 中国科学院理化技术研究所 | Wavelength modulation surface plasma resonance detection device based on laser confocal imaging |
| CN112666098A (en) * | 2020-11-06 | 2021-04-16 | 上海市第八人民医院 | Pathogenic pathogen detection system for intestinal infectious disease in summer |
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| CN100567955C (en) | 2009-12-09 |
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