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A continuous crescent-shaped nano-microstructure with electromagnetic field enhancement performance and its preparation method

An electromagnetic field and performance technology, applied in the field of nano-microstructure preparation, can solve problems such as non-realization, and achieve the effect of strong controllability and simple operation

Active Publication Date: 2021-12-28
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the simple, efficient, and low-cost mass production of continuous crescent-shaped nanostructures, especially continuous paired crescent-shaped nanostructures with paired tips and nanogap, has not yet been realized.

Method used

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  • A continuous crescent-shaped nano-microstructure with electromagnetic field enhancement performance and its preparation method
  • A continuous crescent-shaped nano-microstructure with electromagnetic field enhancement performance and its preparation method
  • A continuous crescent-shaped nano-microstructure with electromagnetic field enhancement performance and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Embodiment 1: the preparation of hydrophilic glass sheet

[0045] The silicon wafer used is cut to a length of 2.0 cm and a width of 2.0 cm with a glass knife, put into a mixed solution of concentrated sulfuric acid and hydrogen peroxide (volume ratio of 7:3) and heated to 80￠ in a water bath, and kept for 5 hours to obtain Hydrophilic glass sheet: wash the glass sheet repeatedly (3 to 5 times) with deionized water, and dry it with nitrogen gas for later use.

Embodiment 2

[0046] Example 2: Preparation of hexagonal close-packed monolayer polystyrene colloidal crystals

[0047] Place the hydrophilically treated silicon wafer horizontally on the sample stage of the vacuum evaporation coating equipment, the angle between the sample normal and the deposition direction (that is, the incident angle) is 0°, and the -4 The thermal evaporation deposition of metal chromium is carried out under the vacuum degree, and the deposition rate is The deposition thickness is 3nm; use a disposable syringe to draw 0.2mL ethanol-water dispersion of hydrophobic polystyrene microspheres with a diameter of 700nm, and slowly drop it onto the air-deionized water interface of the petri dish, let it stand for a while, along the Add 50 μL of 10wt% sodium lauryl sulfate aqueous solution to one side of the petri dish, and the polystyrene microspheres will form a hexagonal close-packed monolayer; Under the water surface, slowly lift up from the bottom of the tight monolayer m...

Embodiment 3

[0048] Example 3: Preparation of gold-covered polystyrene microsphere array template embedded in epoxy resin

[0049] Place the polystyrene microsphere array prepared above horizontally on the sample stage of the vacuum evaporation coating equipment, the angle between the normal line of the sample and the deposition direction (i.e. the angle of incidence) is 0°, and at 5×10 -4 The thermal evaporation deposition of gold is carried out under the vacuum degree of Pa, and the deposition rate is The deposition thickness is 110nm, and the gold-covered polystyrene microsphere array template is prepared; the epoxy resin prepolymer and the curing agent are coated on the surface of the gold-covered polystyrene microsphere array template at a volume ratio of 15:2, and after standing for 2h , placed in an oven at a temperature of 60°C, and after curing for 6 hours, the epoxy resin was uncovered to peel off the gold-covered polystyrene microsphere array from the silicon substrate, and the...

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PUM

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Abstract

A continuous crescent-shaped nano-microstructure with electromagnetic field enhancement performance and a preparation method thereof belong to the technical field of nano-microstructure preparation. The invention adopts nano cutting technology, physical vapor deposition technology, colloid self-assembly technology and plasma etching technology. The whole process is easy to operate, low consumption and clean, and highly controllable. Based on colloid etching and nano-cutting, continuous crescent-shaped nano-microstructures with different morphologies can be prepared; at the same time, combined with multiple metal depositions, the thickness of the deposited spacer layer can be controlled to prepare a series of continuous crescent-shaped nano-gap structures with different gap sizes; by controlling The direction of deposition and the number of deposition times are used to realize the preparation of continuous crescent-shaped nanowires and continuous crescent-shaped nanogap structures. This simple, efficient, and low-cost continuous crescent-shaped nano-microstructure has denser hot spots, which significantly enhances the electromagnetic field, and can be used in practical applications such as new optical devices and electrical devices.

Description

technical field [0001] The invention belongs to the technical field of nano-microstructure preparation, and in particular relates to a continuous crescent-shaped nano-microstructure with electromagnetic field enhancement performance and a preparation method thereof. Background technique [0002] Plasmonic nanostructures have attracted much attention because of their ability to confine light at the nanoscale and enhance spectroscopy at surfaces [1-3] ,biological sensor [4-6] , nonlinear optics [7-9] Play a huge role in other applications. When nanostructures introduce asymmetry factors, they will exhibit unique optical properties compared to symmetric structures [10][11] . Among them, plasmonic nano-crescent is a typical asymmetric nano-microstructure, which has been widely studied and exhibits a series of interesting optical properties and application potential. For example, the dark-mode plasmon resonance of plasmonic nano-crescent structures in metamaterials [12] , s...

Claims

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Application Information

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IPC IPC(8): B81C1/00B81B1/00
CPCB81C1/00444B81B1/00B81B2201/04B81B2203/0392
Inventor 张刚郑天幸谷盼盼
Owner JILIN UNIV