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Photoelectrochemistry biosensor and preparation method thereof

A biosensor, photoelectrochemical technology, applied in the direction of material electrochemical variables, scientific instruments, instruments, etc., can solve the problems of destroying nanostructures and troubles, and achieve the effect of enhancing photocurrent, promoting transmission, and improving photoelectric conversion rate.

Inactive Publication Date: 2010-07-14
THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method is relatively cumbersome, requiring simple and cheap templates to be prepared in advance, and an appropriate method must be selected to remove the templates after deposition, so as to avoid damaging the resulting nanostructures.

Method used

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  • Photoelectrochemistry biosensor and preparation method thereof
  • Photoelectrochemistry biosensor and preparation method thereof
  • Photoelectrochemistry biosensor and preparation method thereof

Examples

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Embodiment 1

[0022] The preparation and working steps of the photoelectrochemical biosensor are as follows:

[0023] (1) Place the glass substrate in a mixed solution of concentrated sulfuric acid and hydrogen peroxide (volume ratio = 7:3), heat it to 80°C for 5 minutes (a large number of bubbles are generated), take it out and rinse it with a large amount of secondary deionized water, N 2 Air dry. A 0.1-10nm-thick chromium layer is first sputtered on the glass substrate, and then a layer of gold film is sputtered, and the morphology of the gold electrode obtained by atomic force microscope (AFM) and scanning electron microscope (SEM) is observed, as shown in figure 1 shown. Electrochemical deposition experiments were carried out in a classic three-electrode electrolytic cell. With 1g / L HAuCl 4 and 0.1M H 2 SO 4 The aqueous solution is an electrolyte, the working electrode is a gold film electrode obtained by sputtering, the counter electrode is a platinum sheet, the reference electr...

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Abstract

The invention provides a photoelectrochemistry biosensor and a preparation method thereof. The biosensor uses a gold electrode with a rough surface as a conductive electrode. The surface of the conductive electrode is provided with a photosensitizer. The photosensitizer is a conducting polymer with biomolecule recognition groups, wherein after being compounded with the photosensitizer, i.e. the conducting polymer with the biomolecule recognition groups, the rough gold surface not only is beneficial for capturing light, but also can improves the transmission of a photon-generated carrier of the conducting polymer on the surface of the electrode so as to improve photoelectric conversion rate, strengthen a photoelectric current generated by the system and achieve the effect of improving the detection sensitivity of the photoelectrochemistry biosensor. The preparation method comprises a step of adopting an electrochemical deposition method in which no moulding board and no surface active agent participate to prepare the gold electrode. The method is simple and easy to operate and further improves the preparation efficiency of the photoelectrochemistry biosensor.

Description

technical field [0001] The invention relates to a photoelectrochemical biosensor and a preparation method thereof, in particular to a photoelectrochemical biosensor which utilizes a rough gold surface to enhance photoelectric signals and a preparation method thereof. Background technique [0002] It is well known that the properties of materials, especially the interface properties, are jointly determined by the material composition and surface structure of materials. The nanostructure of the rough surface has a great influence on its interfacial properties. Rough surfaces with reasonable nanostructures have applications in many fields, such as, 1) improving the performance of optical devices, including surface-extended Raman scattering, surface plasmon resonance, anti-reflection properties, etc.; 2) significantly improving the performance of optoelectronic devices Conversion efficiency, the nanostructured surface can not only provide a larger surface area, but also enhance...

Claims

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Application Information

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IPC IPC(8): G01N27/327G01N27/28
Inventor 周惠琼唐智勇江雷
Owner THE NAT CENT FOR NANOSCI & TECH NCNST OF CHINA
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