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Absorption luminosity detecting sensor based on micro-fluid control channel full-reflection integration light waveguide

A microfluidic channel, detection sensor technology, used in laboratory containers, color/spectral property measurement, laboratory utensils, etc.

Active Publication Date: 2013-03-06
INST OF ELECTRONICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, this method has not been reported internationally

Method used

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  • Absorption luminosity detecting sensor based on micro-fluid control channel full-reflection integration light waveguide
  • Absorption luminosity detecting sensor based on micro-fluid control channel full-reflection integration light waveguide
  • Absorption luminosity detecting sensor based on micro-fluid control channel full-reflection integration light waveguide

Examples

Experimental program
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Effect test

Embodiment 1

[0057] Total nitrogen detection. The 220, 275nm dual-wavelength ultraviolet LED light source is integrated into the light source interface, and the silicon photodiode sensitive to the dual-wavelength light is integrated into the detection unit interface, and the water sample that has undergone thermal digestion or UV-assisted digestion is passed through the sample to be tested. The entrance leads to the absorption unit with "Z" shape structure. Turn on the LED light source, the light enters the absorption area filled with the water sample to be tested through the incident optical waveguide, and passes through the optical waveguide in the absorption area, the light is partially absorbed by the nitrate solution, and the absorption amount is proportional to the concentration of nitrate. The absorbed light enters the silicon photodiode through the outgoing light waveguide, and the silicon photodiode generates a current proportional to the light intensity under the action of the ph...

Embodiment 2

[0059] Total phosphorus detection. The LED light source with a wavelength of 700nm is integrated and installed on the light source interface, and the silicon photodiode sensitive to this wavelength is integrated and installed on the detection unit interface. The inlet of the sample to be tested is connected to the absorption unit with "Z" shape structure. Turn on the LED light source, the light enters the absorption area filled with the water sample to be tested through the incident light waveguide, and passes through the absorption area optical waveguide, the light is partially absorbed by the nitrate solution, and the absorption amount is proportional to the concentration of phosphate. The light absorbed by A enters the silicon photodiode through the outgoing light waveguide, and the silicon photodiode generates a current proportional to the light intensity under the action of the photoelectric effect to realize the detection of the total phosphorus absorption value.

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Abstract

The invention discloses an absorption luminosity detecting sensor based on micro-fluid control channel full-reflection integration light waveguide, relating to a sensor technology. An optical full-reflection thin film can be selectively prepared in a micro-fluid control channel by using a chemical deposition method, so that the entire integration of a transmission channel and a detection channel of light in micro-fluid control optical detection can be realized. Light with a special wavelength enters an absorption pool through incident light waveguide, spreads inside the absorption pool along liquid core light waveguide and is partially absorbed by a solution to be detected, and finally enters a silicon light diode through emergent light waveguide, thus finishing the luminosity detection. In-situ preparation of the light waveguide on the micro-fluid control chip can be realized through the sensor provided by the invention, so that the integration and the reliability of a absorption luminosity method detection chip based on the micro-fluid control technology can be greatly improved. The absorption luminosity detecting sensor has very important reference meanings on the development of a fluorescence method and a chemiluminiscence method based on micro-fluid control optical detection.

Description

technical field [0001] The invention relates to an absorptiometry detection sensor based on a total reflection integrated optical waveguide of a microfluidic channel, in particular to a method for selectively preparing an optical total reflection film in a microfluidic channel by using a chemical deposition method, and a microfluidic optical detection sensor. A fully integrated manufacturing method for the light transmission channel and the detection channel. Background technique [0002] Microfluidic chips have developed rapidly in the past 20 years since they were first proposed in the early 1990s. From the original capillary electrophoresis chip to the chip laboratory, it has been rated as "the technology of the century" by Nature magazine, and has advanced to a higher level. levels are recognized by academia and industry. The most widely used and effective methods in microfluidic analysis are spectroscopic detection methods, including fluorescence, molecular absorption,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/31G01N21/33B01L3/00
Inventor 佟建华边超祁志美孙楫舟夏善红董甜
Owner INST OF ELECTRONICS CHINESE ACAD OF SCI
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