Nano porous surface plasmon crystal and preparation method thereof

A surface plasmon and nanoporous technology, applied in crystal growth, nanotechnology, polycrystalline material growth, etc., can solve the problems of poor optical properties of surface plasmon crystals, achieve excellent optical characteristics, and obviously economical Benefits, industrial simplicity of preparation

Inactive Publication Date: 2018-05-08
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is: the optical performance of the surface plasmon crystal prepared by the existing method is not good, and the problem to be improved

Method used

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  • Nano porous surface plasmon crystal and preparation method thereof
  • Nano porous surface plasmon crystal and preparation method thereof
  • Nano porous surface plasmon crystal and preparation method thereof

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preparation example Construction

[0036] The invention provides a method for preparing a nanoporous surface plasmon crystal, comprising the following steps:

[0037] a. The nano-microsphere suspension is formed into single dispersed nano-microspheres on the surface of the silicon wafer by a spin-coating method;

[0038] b. Assembling the single dispersed nanospheres obtained in step a onto the surface of the substrate by using a gas / liquid interface self-assembly method to form a regular two-dimensional hexagonal close-packed nanosphere array;

[0039] c. annealing the two-dimensional hexagonal close-packed nanosphere array obtained in step b;

[0040] d. Depositing an alloy thin film on the surface of the two-dimensional hexagonal close-packed nano-microsphere array after the annealing in step c by using a physical vapor deposition method to form an array of metal alloy hemispherical shells;

[0041] e. Dealloying the array obtained in step d in an electrolyte solution to form a nanoporous metal hemispherica...

Embodiment 1

[0061] Example 1 Using the method of the present invention to prepare nanoporous surface plasmon crystals

[0062] (1) Place the silicon wafer with a diameter of 2 inches after hydrophilic treatment in a spin coater, and use a pipette to drop 100 μl of polystyrene microsphere suspension with a diameter of 500 nm and a concentration of 2.5 wt% onto the silicon wafer , set the spin-coating program as follows: the first step is 600rpm for 20s, and the second step is 2500rpm for 40s. Start the spin coater for spin coating. The samples were removed after spin coating.

[0063] (2) Add a sufficient amount of deionized water to a petri dish with a diameter of 15 cm, add 5 μl of sodium dodecyl sulfate dropwise in the deionized water, and then place the sample in step 1 incline slowly in deionized water to make the surface of the poly Styrene microspheres self-assembled on the water surface to form a dense and regularly arranged monolayer array. The single-layer polystyrene array on...

Embodiment 2

[0067] Example 2 Using the method of the present invention to prepare nanoporous surface plasmon crystals

[0068] (1) Place the silicon wafer with a diameter of 2 inches after hydrophilic treatment in a spin coater, and use a pipette to drop 100 μl of polystyrene microsphere suspension with a diameter of 500 nm and a concentration of 2.5 wt% onto the silicon wafer , set the spin-coating program as follows: the first step is 600rpm for 20s, and the second step is 2500rpm for 40s. Start the spin coater for spin coating. The samples were removed after spin coating.

[0069] (2) Add a sufficient amount of deionized water to a petri dish with a diameter of 15 cm, add 5 μl of sodium dodecyl sulfate dropwise in the deionized water, and then place the sample in step 1 incline slowly in deionized water to make the surface of the poly Styrene microspheres self-assembled on the water surface to form a dense and regularly arranged monolayer array. The single-layer polystyrene array on...

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Abstract

The invention belongs to the field of nano material preparation, and particularly relates to a nano porous surface plasmon crystal and a preparation method thereof. The preparation method of the nanoporous surface plasmon crystal is provided aiming at the problems that the optical performance of a surface plasmon crystal prepared through an existing method is poor and needs to be improved. The preparation method includes the following steps that a, nano particle suspension liquid is prepared into singly dispersed nano particles; b, the nano particles are assembled on the surface of a substrate, and a regular two-dimensional hexagonal close-packed nano particle array is formed; c, annealing treatment is carried out; d, an alloy thin film is deposited on the surface of the two-dimensional particle nano array, and a metal alloy hemispherical shell array is formed; e, dealloying treatment is carried out, and a nano porous metal hemispherical shell array structure is formed. The preparation process is simple, the equipment requirement is not high, the cost is low, the prepared nano porous surface plasmon crystal has more excellent optical characteristics, and obvious economic benefitsare achieved.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation, and in particular relates to a nanoporous surface plasmon crystal and a preparation method thereof. Background technique [0002] Nanoporous surface plasmon crystals are a kind of surface plasmon crystals. Due to their unique optical properties such as surface-enhanced Raman scattering and other excellent properties, surface plasmons (surface plasmons) nanomaterials are widely used In molecular detection, biomedicine and environmental protection and other fields. [0003] At present, surface plasmon crystals are mainly prepared by nanosphere etching technology, that is, using vacuum evaporation and other physical vapor deposition techniques to deposit metal on the surface of two-dimensional ordered nanosphere arrays (such as polystyrene, silicon dioxide, etc.) film, and finally form a regular arrangement of metal hemispherical shell array structure. [0004] In 2001, Litorja M. et al pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/00C30B30/02C23C14/18C23C14/20B82Y40/00
CPCB82Y40/00C23C14/18C23C14/20C23C14/223C30B29/00C30B30/02
Inventor 杜凯黄景林何小珊刘艳松何智兵王涛陈果
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
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