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Gold nanoparticle monofilm preparation method and device thereof

A technology of gold nanoparticles and nanoparticles, which is applied in the field of preparation of gold nanoparticle single-layer films, can solve the problems of difficult assembly structure, complicated operation, and harsh assembly conditions, and achieve the advantages of simple preparation method and cleanliness, which are conducive to popularization and application. excellent effect

Inactive Publication Date: 2014-02-19
SUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, sulfhydryl reagents are toxic to organisms, and their strong interaction with the surface of gold nanoparticles makes assembly structures encounter certain difficulties in subsequent applications
In addition, the size of gold nanoparticles assembled by sulfhydryl reagents is generally small, the assembly conditions are relatively harsh, the operation is complicated, and the assembly area is only on the micron scale. These shortcomings greatly limit the further research on the assembly structure of nanoparticles.

Method used

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  • Gold nanoparticle monofilm preparation method and device thereof
  • Gold nanoparticle monofilm preparation method and device thereof
  • Gold nanoparticle monofilm preparation method and device thereof

Examples

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Embodiment 1

[0033] The present embodiment provides a method for preparing a gold nanoparticle monolayer film, and the specific steps are as follows:

[0034] (1) Add 100 mL of chloroauric acid solution with a concentration of 0.25 mM to a 100 mL three-necked flask, and the solution is light yellow; heat the solution to boiling, and add 2 mL of citric acid with a concentration of 0.01 g / mL under vigorous stirring. Sodium solution. At this time, the solution gradually changed from light yellow to wine red, and the entire color change process took 1 to 3 min. Start timing when the solution turns wine red, keep the system boiling for 15 min under stirring conditions, and then naturally cool to room temperature to obtain 15 nm gold sol.

[0035] (2) Absorb 25 mL of the 15 nm gold sol prepared in step (1), add 1 mL of sodium citrate solution with a concentration of 0.01 g / mL, 1 mL of PVP solution with a concentration of 0.01 g / mL and 20 mL of 2.5 mM hydroxylamine hydrochloride solution. ; 20 ...

Embodiment 2

[0044] A method for preparing a gold nanoparticle monolayer film, the steps are as follows:

[0045] (1) Add 100 mL of chloroauric acid solution with a concentration of 0.25 mM into a 100 mL three-necked flask, the solution is light yellow; heat the solution to boiling, and add 2 mL of citric acid with a concentration of 0.01 g / mL under vigorous stirring sodium solution. At this time, the solution gradually changed from light yellow to wine red, and the entire color change process took 1 to 3 minutes. The timing was started when the solution turned wine red, and the system was kept boiling for 15 min under stirring conditions, and then naturally cooled to room temperature to obtain a 15 nm gold sol.

[0046] (2) Take 25 mL of the 15 nm gold sol prepared in (1), add 1 mL of sodium citrate solution with a concentration of 0.01 g / mL, 1 mL of PVP solution with a concentration of 0.01 g / mL and 20 mL of 2.5 mM hydroxylamine hydrochloride solution; With stirring, 20 mL of 2.5 mM ch...

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Abstract

The invention discloses a gold nanoparticle monofilm preparation method and a device thereof. The gold nanoparticle monofilm preparation method comprises the steps of preparation of gold sol, formation, transfer and optimization of monofilm, and so on. A desired gold nanoparticle monofilm can be prepared by controlling monodispersity of the gold sol and solvent volatilization, and designing transfer of an interface monofilm. A special chimney device is designed in the solvent volatilization step, and comprises an upper part and a lower part communicated with each other, wherein the lower part is a columnar container chamber; the upper part is a tire-shaped exhaust pipe with an air hole on the top, and can effectively control volatilization of the gold nanosol. The method provided by the invention can prepare a large-area gold nanoparticle monofilm assembly structure at normal temperature and under normal pressure without adding any other extra agents; the monofilm is excellent in uniformity and high in SERS (surface enhanced raman scattering) activity, and can serve as an ideal SERS substrate and membrane electrode. The preparation method has the advantages of easy process, mild conditions, and no need for particular large-scale apparatus and equipment, and can be conducted in a laboratory.

Description

technical field [0001] The invention relates to a preparation method and a device of a gold nanoparticle monolayer film, belonging to the technical field of nanoparticle assembly. Background technique [0002] Nanofabrication technology has an important mission to support the latest scientific and technological progress. The need for the development of the national defense strategy and the attractiveness of the high-profit market for nano-precision products have prompted the emergence and rapid development of nano-fabrication technology. For example, precision gyroscopes, laser nuclear fusion mirrors, large-scale astronomical telescope mirrors and polygonal prisms, large-scale film integrated circuit silicon wafers, computer disks, and copier magnetic drums of modern weapons and inertial navigation instruments all require nanoscale processing. The development of nanofabrication technology has also promoted the development of mechanical, electronic, semiconductor, optical, s...

Claims

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Application Information

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IPC IPC(8): C23C28/02C23C14/34C23C14/16C23C20/04B82Y40/00
Inventor 姚建林郭清华翁华怡袁亚仙
Owner SUZHOU UNIV
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