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

A silver nanoparticle and liquid interface technology, which is applied in chemical instruments and methods, catalyst activation/preparation, physical/chemical process catalysts, etc., can solve problems such as expensive reaction precursors, complicated experimental steps, and limited practical applications, and achieve good results. Raman enhancement effect, high detection sensitivity, low cost effect

Inactive Publication Date: 2013-06-05
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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Embodiment Construction

[0019] 1. Morphology of silver nanoparticle film

[0020] At room temperature, first use V 乙醇 :V 水 = 3:7 ratio of mixed solution to prepare 10 mmol L -1 Cinnamic acid solution, take 1.0 mL, 3.0 mL, 9.7 mL, 10 mmol L -1 Cinnamic acid solution was diluted to 9.7 mL with ultrapure water, and then 0.3 mL, 10 mmol·L -1 Mix the silver nitrate aqueous solution evenly. 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 point a film of silver nanoparticles appears on the air-solution interface. The silver nanoparticle film was collected with a 1.0 cm × 1.0 cm conductive glass and dried 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 composed of...

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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 using a gas-liquid interface. technical background [0002] Two- and three-dimensional nanostructures and microstructures of noble metals have attracted much attention due to their potential applications in magnetism, optics, microelectronics, nanoscale electronics, catalysis, and surface-enhanced Raman scattering (SERS) . The unique and fascinating properties of nanomaterials are related to the size, shape and spacing of nanoparticles. Thus, a great deal of research has focused on synthesizing nanomaterials with desired shapes. [0003] SERS is a unique and highly sensitive analytical detection method, which can amplify the Raman signal of molecules adsorbed on the surface of noble metals by several to ten orders of magnitude. Since the discovery of SERS, the problem to be solved in its analytical application is h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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