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Method for analyzing a growth mechanism of a silver nano structure

An analysis method, the technology of silver nanorods, applied in the field of mechanism analysis, can solve problems such as single structure, difficult research, and single product structure, and achieve the effect of strong experimental operability, simple design ideas, and mild conditions

Active Publication Date: 2022-01-28
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004]However, the currently prepared templates, such as silica and other materials, have a relatively simple structure and strong rigidity, which has a strong restrictive effect on the growth of the structure, so that The structure of the obtained product is single, and it is difficult to distinguish the influence of soft and hard templates on the structural change, so the study of the growth mechanism of nanostructures under the template method has been difficult to achieve

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  • Method for analyzing a growth mechanism of a silver nano structure
  • Method for analyzing a growth mechanism of a silver nano structure
  • Method for analyzing a growth mechanism of a silver nano structure

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Embodiment 1

[0022] A method for analyzing the growth mechanism of silver nanorods, comprising the following steps:

[0023] a. Prepare gold nano bipyramids, under the leading of co-reduction reaction, prepare gold nano bipyramid-based closed gold nanoframes as hard templates, and under the leading of displacement reaction, prepare gold nano bipyramidal bases of unblocked gold nanoframes as hard templates;

[0024] b. Centrifuge 2mL hard template aqueous solution at 6500rpm / min for 10min, disperse into 2mL, 0.08mol / L cetyltrimethylammonium chloride solution, and measure the particles with UV-Vis-NIR spectrometer According to the intensity of the absorption peak, adjust the number of particles of each hard template to be equal. If the intensity exceeds the set intensity 1, add cetyltrimethylammonium chloride to dilute, and repeat the measurement of the spectrum to adjust until it is adjusted to Number of particles required;

[0025] c. Add 100 μL, 0.01mol / L silver nitrate solution and 50 μ...

Embodiment 2

[0029] A method for analyzing the growth mechanism of silver nanorods, comprising the following steps:

[0030]a. Prepare gold nano bipyramids, under the leading of co-reduction reaction, prepare gold nano bipyramid-based closed gold nanoframes as hard templates, and under the leading of displacement reaction, prepare gold nano bipyramidal bases of unblocked gold nanoframes as hard templates;

[0031] b. Centrifuge 2mL hard template aqueous solution at 6500rpm / min for 10min, disperse into 2mL, 0.08mol / L cetyltrimethylammonium chloride solution, and measure the particles with UV-Vis-NIR spectrometer According to the intensity of the absorption peak, adjust the number of particles of each hard template to be equal. If the intensity exceeds the set intensity of 0.8, add cetyltrimethylammonium chloride to dilute, and repeat the measurement of the spectrum to adjust until it is adjusted to Number of particles required;

[0032] c. Add 20 μL, 0.01mol / L silver nitrate solution and 1...

Embodiment 3

[0036] A method for analyzing the growth mechanism of silver nanorods, comprising the following steps:

[0037] a. Prepare gold nano-bipyramids. Under the condition that the proportion of co-reduction reaction and replacement reaction is equal, prepare gold nano-bipyramid bases and semi-closed gold nanoframes as hard templates. Under the leadership of displacement reactions, prepare gold nano-bipyramid bases without The closed gold nanoframe is a hard template;

[0038] b. Centrifuge 2mL hard template aqueous solution at 6500rpm / min for 10min, disperse into 2mL, 0.08mol / L cetyltrimethylammonium chloride solution, and measure the particles with UV-Vis-NIR spectrometer According to the intensity of the absorption peak, adjust the number of particles of each hard template to be equal. If the intensity exceeds the set intensity of 0.6, add cetyltrimethylammonium chloride to dilute, and repeat the measurement of the spectrum to adjust until it is adjusted to Number of particles re...

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Abstract

The invention discloses a method for analyzing a growth mechanism of a silver nano structure, which comprises the following steps of: (a) preparing a gold nano bipyramid and a gold nano frame taking the gold nano bipyramid as a center, and respectively taking the gold nano bipyramid and the gold nano frame as length-adjustable hard templates; (b) centrifugally dispersing the hard templates into a hexadecyl trimethyl ammonium chloride solution, measuring absorption peaks of particles, and adjusting the number of the particles of each hard template to be equal according to the intensity of the absorption peaks; (c) adding a silver nitrate solution and an ascorbic acid solution with the same amount, uniformly performing shaking, and performing reacting at 50-70 DEG C to prepare a silver nanorod; and (d) comparing the morphology of the silver nanorod in the step (c), determining the influence of the type of the hard template in the mixed reaction system on the morphology of the silver nanorod, and determining the growth mechanism of the silver nanorod. According to the method, the gold nanostructures similar in morphology are constructed as the template, the deposition mechanism of the template selected from silver atoms and the important influence of the final structure are simply and visually researched and verified, the design thought is simple, the experiment operability is high, and the conditions are mild.

Description

technical field [0001] The invention belongs to a mechanism analysis method, in particular to an analysis method for the growth mechanism of silver nanostructures. Background technique [0002] Silver nanostructures have broad application prospects in sensing, imaging, and optoelectronic devices due to their excellent surface plasmon properties. The template method is one of the effective methods to realize the precise control of the size and shape of the silver nanostructure. By placing the seed into the template, the reduced atoms will grow on the surface of the seed along the template. Therefore, by selecting a suitable template structure, it is easy to construct an ideal silver nanostructure. Among them, based on the hard template method, such as mesoporous silica, the method of preparing silver nanostructures can finally realize the replication of the space in the template, which has attracted widespread attention and has been reported in many literatures, such as J. ...

Claims

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Application Information

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IPC IPC(8): G01N21/31G01N21/33G01N21/3563G01N21/359
CPCG01N21/31G01N21/33G01N21/3563G01N21/359
Inventor 朱兴忠徐娟恽沁茹阚彩侠
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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