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

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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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