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Method for preparing polymorphic gold nano-structure by using laser-inducing material through reduction

A gold nanostructure, laser-induced technology, applied in the direction of nanotechnology, can solve the problems of introducing impurities, etc., and achieve the effect of reducing reducibility, simple operation, and no need for chemical reagents

Active Publication Date: 2016-06-08
BEIJING INSTITUTE OF TECHNOLOGYGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that a special chemical environment is required, a reducing agent is required, and impurities are easily introduced in the process of preparing gold nanostructures by the existing chemical method. gold nanostructure method

Method used

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  • Method for preparing polymorphic gold nano-structure by using laser-inducing material through reduction
  • Method for preparing polymorphic gold nano-structure by using laser-inducing material through reduction
  • Method for preparing polymorphic gold nano-structure by using laser-inducing material through reduction

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Experimental program
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Effect test

Embodiment 1

[0025] The method for preparing polymorphic gold nanostructures by using laser-induced reduction of materials, the specific steps are as follows:

[0026] (1) The femtosecond laser generates femtosecond laser, and the pulse form is a single pulse.

[0027] (2) The laser beam enters the femtosecond laser double pulse generator based on the Michelson interferometer, and the femtosecond laser pulse sequence is obtained through time-domain shaping, and the energy ratio of the two sub-pulses is 1:1.

[0028] (3) The femtosecond laser pulse sequence in (2) is focused on the upper surface of the sample to be processed through the focusing objective lens to modify the material. The value aperture of the focusing objective lens used here is 0.15.

[0029] (4) Adjust the energy of the femtosecond laser to 0.1uJ through the neutral density attenuation plate; use the computer to control the double pulse generator to adjust the pulse delay to 5ps; use the computer to control the movement ...

Embodiment 2

[0033] The method for preparing polymorphic gold nanostructures by using laser-induced reduction of materials, the specific steps are as follows:

[0034] (1) The femtosecond laser generates femtosecond laser, and the pulse form is a single pulse.

[0035] (2) The laser beam enters the femtosecond laser double pulse generator based on the Michelson interferometer, and the femtosecond laser pulse sequence is obtained through time-domain shaping, and the energy ratio of the two sub-pulses is 1:1.

[0036] (3) The femtosecond laser pulse sequence in (2) is focused on the upper surface of the sample to be processed through the focusing objective lens to modify the material. The value aperture of the focusing objective lens used here is 0.15.

[0037] (4) Adjust the energy of the femtosecond laser to 0.1uJ through the neutral density attenuation sheet; use the computer to control the double pulse generator to adjust the pulse delay to 0.5ps; use the computer to control the movemen...

Embodiment 3

[0041] The method for preparing polymorphic gold nanostructures by using laser-induced reduction of materials, the specific steps are as follows:

[0042] (1) The femtosecond laser generates femtosecond laser, and the pulse form is a single pulse.

[0043] (2) The laser beam enters the femtosecond laser double pulse generator based on the Michelson interferometer, and the femtosecond laser pulse sequence is obtained through time-domain shaping, and the energy ratio of the two sub-pulses is 1:1.

[0044] (3) The femtosecond laser pulse sequence in (2) is focused on the upper surface of the sample to be processed through the focusing objective lens to modify the material. The value aperture of the focusing objective lens used here is 0.15.

[0045] (4) Adjust the energy of the femtosecond laser to 0.3uJ through the neutral density attenuator; use the computer to control the double pulse generator to adjust the pulse delay to 0.1ps; use the computer to control the movement of th...

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Abstract

The invention relates to a method for preparing a polymorphic gold nano-structure by using a laser-inducing material through reduction and belongs to the field of micro-nano manufacture. According to the method, different degrees of reducibility of the surface of a molybdenum disulfide film are induced to obtain a modified molybdenum disulfide film by focusing a femtosecond laser pulse sequence to the surface of the molybdenum disulfide film; the modified molybdenum disulfide film is immersed into a chloroauric acid solution with the concentration of 0.2-8 mM / L, and the modified area of the molybdenum disulfide film performs reducing reaction with chloroauric acid to obtain the polymorphic gold nano-structure. The method for preparing the polymorphic gold nano-structure by using the laser-inducing material through reduction utilizes regulation and control of the femtosecond laser pulse sequence to enable the molybdenum disulfide surface to have chemical reduction activity so as to directly obtain the gold nano-structure through reduction and has the advantages that a special chemical environment and any chemical reagent are not needed, and the method is green, environmentally friendly, simple and flexible in operation and the like.

Description

technical field [0001] The invention relates to a method for reductively preparing polymorphic gold nanostructures by laser-induced materials, and belongs to the field of micro-nano manufacturing. Background technique [0002] Molybdenum disulfide is a new graphene-like two-dimensional material, which has a wide range of applications in electronics, optoelectronics, sensing, photocatalysis and other fields, so the regulation of its surface chemical activity is of great significance. [0003] Material surface modification can be achieved by a variety of chemical and physical methods, including plasma etching, electron beam processing, chemical etching, electrochemical and laser processing; among them, laser processing is fast, flexible, non-contact, and non-contact. Pollution, no need for harsh conditions, and femtosecond laser has the advantages of short pulse duration, high pulse peak power, avoiding thermal effects to prevent thermal oxidation of materials, and precise foc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B82Y40/00
CPCB22F9/24B82Y40/00
Inventor 姜澜左佩李欣
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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