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Hollow gold nano particle sensing membrane and preparation method thereof

A gold nanoparticle and silver nanoparticle technology, which is applied in the field of hollow gold nanoparticle sensing film and its preparation, can solve the problems of limiting the application of biosensors, unfavorable surface functionalization of gold nanoparticles, etc. Simple operation and preparation method

Inactive Publication Date: 2013-02-06
SUZHOU UNIV
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Problems solved by technology

However, since this method requires the use of organic stabilizers and adhesives, it is not conducive to the further functionalization of the surface of gold nanoparticles, which limits its application in biosensors.

Method used

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  • Hollow gold nano particle sensing membrane and preparation method thereof
  • Hollow gold nano particle sensing membrane and preparation method thereof
  • Hollow gold nano particle sensing membrane and preparation method thereof

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Embodiment 1

[0029] see Figure 1~9 Shown, a kind of preparation method of hollow gold nanoparticle sensing membrane comprises the steps:

[0030] (1) Preparation of the template: A rectangular substrate made of ITO conductive glass with a length of 4.0 cm and a width of 0.6 cm was cleaned sequentially with ammonia water (water: concentrated ammonia water = 30:1), absolute ethanol, and sub-boiling water for 10 min. , in 7.0 mL silver plating solution (plating solution composition: 2 mL 1 mmol AgNO 3 , 0.3 M KNO 3 ), using cyclic voltammetry to electrodeposit silver nanoparticles, deposition conditions: temperature 30°C, nitrogen protection, scan rate 0.05V / s, scan cycle 100;

[0031] (2) Place the silver nanoparticle ITO glass template prepared above in the replacement solution (composition of the replacement solution: 1 mL 0.1 mmol HAuCl 4 , 4mL sub-boiling aqueous solution), take a water bath (water bath temperature 50°C) to generate a hollow gold nanoparticle structure, and the time ...

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Abstract

The invention discloses a preparation method of a hollow gold nano particle sensing membrane, and the method comprises the following steps of: (a) adopting an electrochemical method to directly deposit silver nano particles on an ITO (Indium Tin Oxide) conductive glass surface to be used as a template; and (b) adopting HAuCl4 to displace the silver nano particles and depositing gold on the surfaces of the silver nano particles; and meanwhile, dissolving the silver nano particles to obtain the hollow gold nano particle sensing membrane. According to the preparation method disclosed by the invention, a hollow nano gold shell is immobilized on the surface of the transparent conductive glass surface, and any organic stabilizing agent and bonding agent do not need to be added; and the surface is clean and the gold surface is further functionalized to prepare an LSPR (Localized Surface Plasmon Resonance) biosensor.

Description

technical field [0001] The invention relates to a hollow gold nanoparticle sensing membrane and a preparation method thereof, which is a localized surface plasmon resonance spectrum sensing membrane and can further construct chemical and biological sensors. Background technique [0002] Localized surface plasmon resonance (LSPR for short) is an important property of noble metal nanoparticles. For example, gold nanoparticles show strong absorption peaks in the ultraviolet-visible spectrum. Local surface plasmon resonance absorption spectroscopy is not only related to the type, composition, shape, structure, and size of noble metal materials, but also extremely sensitive to the surrounding environment medium, so it can be used in the field of sensing. Local surface plasmon resonance sensors are small in size, easy to integrate, low in cost, can realize biosensing through simple equipment (such as various spectrophotometers), are not sensitive to temperature, have high sensitiv...

Claims

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Application Information

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IPC IPC(8): G01N21/33G01N33/531B22F9/24
Inventor 狄俊伟林媛媛胡婷婷
Owner SUZHOU UNIV
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