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A method for controlling deposition of gold atoms on silver nanostructures

A technology of atomic deposition and control method, which is applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of single deposition mode and no clear exploration of gold atom deposition mechanism, and achieve the control method Simple, excellent surface plasmon properties, and enhanced stability

Active Publication Date: 2022-07-08
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in these reports, the deposition mode of gold atoms is relatively single, and based on the uniform distribution of high-energy surfaces and tip positions in the selected silver nanostructures, the obtained nanostructures are basically cubic-based nanostructures with similar structures. , so that the deposition mechanism of gold atoms has not been clearly explored

Method used

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  • A method for controlling deposition of gold atoms on silver nanostructures
  • A method for controlling deposition of gold atoms on silver nanostructures
  • A method for controlling deposition of gold atoms on silver nanostructures

Examples

Experimental program
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Effect test

Embodiment 1

[0031] A method for controlling deposition of gold atoms on a silver nanostructure, comprising the following steps:

[0032] a. Add 5mL gold nano bipyramid solution to 20mL, 0.08mol / L cetyltrimethylammonium chloride solution, then add 500μL, 0.01mol / L silver nitrate solution and 250μL, 0.1mol / L silver nitrate solution Ascorbic acid solution, shake the obtained mixed solution and put it into a 65°C oven for 4.5 hours to obtain silver nanorods, such as Figures 1 to 2 As shown in the figure, the silver nanorod has a tip, a side and a side edge. The tip includes 10 {111} faces, the side includes 5 {100} faces, and the side edges include 5 {110} faces. The side edges are high surface energy surfaces. The surface energy surface and the tip position are ectopic distribution;

[0033] b, using the silver nanorods obtained in step a as a reaction template, centrifuge at 5000rpm for 10min, and disperse into 8mL, 0.05mol / L hexadecyltrimethylammonium bromide solution to obtain a silver ...

Embodiment 2

[0040] A method for controlling deposition of gold atoms on a silver nanostructure, comprising the following steps:

[0041] a. Add 5mL gold nano bipyramid solution to 20mL, 0.08mol / L cetyltrimethylammonium chloride solution, then add 500μL, 0.01mol / L silver nitrate solution and 250μL, 0.1mol / L silver nitrate solution Ascorbic acid solution, shake the obtained mixed solution and put it in a 65°C oven for 4.5 hours to obtain silver nanorods. The silver nanorods have a tip, a side and a side edge. The tip includes 10 {111} faces and the side includes 5 The {100} plane, the side edge includes 5 {110} planes, the side edge is a high surface energy surface, and the high surface energy surface and the tip position are ectopic distribution;

[0042]b, using the silver nanorods obtained in step a as a reaction template, centrifuge at 5000rpm for 10min, and disperse into 8mL, 0.05mol / L hexadecyltrimethylammonium bromide solution to obtain a silver nanorod solution;

[0043] c. Take 4 ...

Embodiment 3

[0049] A method for controlling deposition of gold atoms on a silver nanostructure, comprising the following steps:

[0050] a. Add 5mL gold nano bipyramid solution to 20mL, 0.08mol / L cetyltrimethylammonium chloride solution, then add 500μL, 0.01mol / L silver nitrate solution and 250μL, 0.1mol / L silver nitrate solution Ascorbic acid solution, shake the obtained mixed solution and put it into a 65°C oven to react for 4.5 hours to obtain silver nanorods. The silver nanorods have a tip, a side and a side edge. The tip includes 10 {111} faces and the side includes 5 The {100} plane, the side edge includes 5 {110} planes, the side edge is a high surface energy surface, and the high surface energy surface and the tip position are ectopic distribution;

[0051] b, using the silver nanorods obtained in step a as a reaction template, centrifuge at 5000rpm for 10min, and disperse into 8mL, 0.05mol / L hexadecyltrimethylammonium bromide solution to obtain a silver nanorod solution;

[0052...

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Abstract

The invention discloses a method for controlling the deposition of gold atoms on silver nanostructures. position distribution; step 2, use silver nanorods as reaction templates, disperse into cetyltrimethylammonium bromide solution, add ascorbic acid solution, stir evenly; step 3, adjust the pH value of the mixed solution, and then adjust the ascorbic acid solution The reducibility of the reaction system can be adjusted to realize the adjustment of the ratio between the replacement reaction and the co-reduction reaction in the reaction system; in step 4, the gold precursor solution is added dropwise to the obtained reaction system, and as the reaction system changes from the replacement reaction system to the co-reduction reaction system, it is reduced The deposition position of the gold atoms gradually migrated from the high surface energy surface to the tip position of the silver nanorods. The invention can realize the controllable deposition of gold atoms by adjusting the pH value of the reaction system, the conditions are simple, the conditions are mild, and the operability is strong.

Description

technical field [0001] The invention belongs to a deposition control method, in particular to a control method for deposition of gold atoms on silver nanostructures. Background technique [0002] Hollow nanostructures have attracted extensive attention and applications in the fields of catalysis, sensing, imaging, and drug release due to their large specific surface area and internal volume. The displacement reaction is an effective method to realize the preparation of hollow nanostructures, but the morphology of the obtained hollow nanostructures is single, and the thickness of the sidewalls is difficult to adjust. In recent years, by combining the displacement reaction with the co-reduction reaction, the fine control of the morphology parameters of the hollow nanostructures has been further realized, and various hollow structures of nanoshells, nanoboxes, nanocages and nanoframes have been obtained, which are widely used in many fields. There are good application prospect...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/054B22F1/17C23C18/44B82Y30/00B82Y40/00
CPCC23C18/44C23C18/1637B82Y30/00B82Y40/00B22F1/07B22F1/0547B22F1/17
Inventor 朱兴忠徐娟恽沁茹阚彩侠
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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