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Preparation method of noble metal nano-particle array

A technology of nanoparticle arrays and noble metals, applied in the field of preparation of noble metal nanoarrays

Inactive Publication Date: 2012-10-24
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these etching techniques are complex, expensive, and inefficient, and there are still difficulties in making large-scale nanoparticle array systems.

Method used

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  • Preparation method of noble metal nano-particle array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] In Example 1, a single-layer hexagonal close-packed polystyrene colloidal sphere mask was first prepared. The preparation process of the template is as follows:

[0054] 1) Experimental reagents and instruments: slides, polystyrene microspheres, quartz plates, 95% ethanol, 2%, 10% dodecylsodiumsulfate (SDS), double distilled water, petri dishes, pipetting Gun, polystyrene colloidal ball.

[0055] 2) Substrate cleaning: Put the substrate in acetone and 95% ETOH, respectively, and ultrasonic for 10 minutes, and then rinse with water; put the rinsed substrate in the previously prepared 10% SDS solution and soak for 24 hours; after soaking The substrate was rinsed with water to remove the SDS remaining on the substrate and put into double distilled water for later use. The cleaned quartz plate is used as a substrate, and the glass slide is used as a drainage plate in the process of dropping the polystyrene colloidal sphere solution.

[0056] The method is mainly based on the se...

Embodiment 2

[0059] ①Deposited metal: In order to obtain a triangular silver nanoparticle array, an electron beam evaporation method is used (vacuum pressure 1×10 -4 Pa) Deposit precious metal silver film (thickness about 100 nm) on a single-layer mask of polystyrene colloidal spheres. ②Remove the polystyrene colloidal sphere template: through the trichloromethane (CHCl 3 ) And other organic solvents to ultrasonically remove the polystyrene colloidal sphere template. ③The obtained large-scale two-dimensional periodic triangular nanoparticle array structure can be characterized by scanning electron microscope, atomic force microscope, etc. The resulting scanning electron microscope picture of the triangular silver nanoparticle array is as follows image 3 Shown.

[0060] By changing the deposition time, an array of silver particles with uniform particle sizes and different heights can be obtained. Based on this template, the particle sizes are relatively concentrated and distributed between 11...

Embodiment 3

[0062] ①Deposited metal: In order to obtain a silver nano-array with a bowl-shaped shell structure, an electron beam evaporation method is used (vacuum pressure 1×10 -4 Pa) Deposit precious metal silver film (thickness about 100 nm) on a single-layer mask of polystyrene colloidal spheres. ②Remove the polystyrene colloidal sphere template: immerse the substrate in chloroform (CHCl 3 ) Ultrasound in the solution to promote the "peeling" of the shell layer on the top of the polystyrene colloidal sphere from the substrate, and finally the obtained silver nanoshell layer is ultrasonically cleaned 2-3 times in 95% ethanol. The bowl-shaped shell structure nanoarray will be obtained. ③The obtained large-scale two-dimensional silver nanoarray with periodic bowl-shaped shell structure can be characterized by scanning electron microscope, atomic force microscope and projection electron microscope. The result is a transmission electron microscope picture of the silver nanoarray with a bowl...

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Abstract

The invention provides a method for preparing a nano-particle array with adjustable size, shape and material type. The method comprises the following steps: preparing a two-dimensional single layer of hexagonal dense structural template with single grain size on a substrate through utilizing self-assembly between polystyrene colloid balls, depositing a noble metal film on the template, and ultrasonically removing a colloid ball mask board with an organic solvent so as to obtain a triangular noble metal nano-particle array on the substrate. The ultrasonic treated polystyrene colloid balls are immersed into chloroform solution to dissolve colloid balls so as to obtain a bowl-shaped shell layer noble metal nano-array. According to the method, the polystyrene colloid balls are not tightly arranged through ion etching / annealing technical manners, so that an annular noble metal nano-particle array is formed on the substrate. The ordered nano-particle array has wide application prospect on chemical and biological sensors, ultra-high density data memory mediums, photo-electric devices and chemical catalysts.

Description

[0001] technical field [0002] The invention relates to a preparation method of a noble metal nano particle array, in particular to a preparation method capable of preparing a noble metal nano array whose size, shape and material type can be adjusted. Background technique [0003] Noble metal nanoparticles are accompanied by strong absorption peaks in the visible light range. This is because the vibration frequency of a large number of conduction electrons in the particles is equal to the frequency of the incident light wave, resulting in a surface plasmon resonance effect, resulting in a strong absorption peak. The peak position of the surface plasmon resonance spectrum is very sensitive to changes in the shape, size, distribution, and external medium environment of nanoparticles. With the development of modern nanotechnology, the preparation of noble metal nanoparticles with different morphologies and their corresponding optical properties have aroused widespread inter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C14/04C23C14/14
Inventor 肖湘衡梅菲任峰蒋昌忠
Owner WUHAN UNIV
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