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Method for assembling silver nanoparticle film by using gas-liquid interface

A technology of silver nanoparticles and liquid interface, applied in chemical instruments and methods, metal/metal oxide/metal hydroxide catalysts, catalyst activation/preparation, etc., can solve complex experimental steps, expensive reaction precursors, and limited practical Application and other issues, to achieve high detection sensitivity, good Raman enhancement effect, low cost effect

Inactive Publication Date: 2012-04-04
JILIN NORMAL UNIV
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Problems solved by technology

However, some of the current synthetic methods require complex experimental steps, and some require expensive reaction precursors, which limit the practical application of these methods

Method used

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  • Method for assembling silver nanoparticle film by using gas-liquid interface
  • Method for assembling silver nanoparticle film by using gas-liquid interface
  • Method for assembling silver nanoparticle film by using gas-liquid interface

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Experimental program
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Embodiment Construction

[0019] 1. The morphology of the silver nanoparticle film

[0020] At room temperature, first use V Ethanol : V water =3:7 ratio mixed solution prepared 10mmol·L -1 Cinnamic acid solution, take 1.0mL, 3.0mL, 9.7mL, 10mmol·L -1 Cinnamic acid solution, respectively diluted with ultrapure water to 9.7mL, then add 0.3mL, 10mmol·L -1 The silver nitrate aqueous solution is mixed uniformly. At this time, the molar ratios of cinnamic acid and silver nitrate are 10:3, 30:3, and 97:3 respectively. Under the condition of vigorous stirring, add the newly prepared 1% ( m / m) Sodium borohydride aqueous solution until the color of the synthesized sol turns brown, at which time the silver nanoparticle film appears on the air-solution interface. Collect the prepared silver nanoparticle film with 1.0cm×1.0cm conductive glass and dry it in the dark.

[0021] Such as figure 1 As shown in a, when the molar ratio of cinnamic acid and silver nitrate is 10:3, the prepared silver nanoparticle film is compo...

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Abstract

The invention relates to a preparation method of a nanoparticle film, in particular to a method for assembling a silver nanoparticle film by using a gas-liquid interface. The method comprises the following steps of: directly reducing a silver nitrate solution with sodium borohydride in an ethanol-water mixed system to prepare cinnamic acid-coated silver nanoparticles; and capturing the silver nanoparticles in the solution on the gas-liquid interface to form a two-dimensional silver nanoparticle film. The shape of the silver nanoparticle film is controlled by adjusting the molar ratio of cinnamic acid to silver nitrate, so that surface-enhanced Raman scattering active substrates with different enhancing capabilities are obtained. The silver nanoparticle film has a very good Raman enhancingeffect. Compared with the prior art, the method has the advantages of low cost, environmentally-friendly synthesis, high stability and simple process steps.

Description

Technical field [0001] The invention relates to a method for preparing a nanoparticle film, in particular to a method for assembling a silver nanoparticle film by using a gas-liquid interface. technical background [0002] Two-dimensional and three-dimensional nanostructures and microstructures of precious metals have attracted a lot of attention due to their potential applications in magnetism, optics, microelectronics, nano-sized electronic devices, catalysis, and surface enhanced Raman scattering (SERS) . The unique and fascinating properties of nanomaterials are related to the size, shape and spacing of nanoparticles. Therefore, a lot of research has focused on synthesizing nanomaterials with desired shapes. [0003] SERS is a unique and extremely sensitive analytical detection method, which can amplify the Raman signal of molecules adsorbed on the surface of precious metals by several to a dozen orders of magnitude. Since the discovery of SERS, the problem to be solved in i...

Claims

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Application Information

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IPC IPC(8): B22F9/24B01J23/50B01J37/02
Inventor 王丽崔运成程思宁姜大雨
Owner JILIN NORMAL UNIV
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