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Method for adjusting distances, densities and optical properties of two-dimensional metal nano-particle arrays

A technology of metal nanoparticles and optical properties, applied in the fields of nano-optics, nanotechnology, nanotechnology, etc., can solve the problems of complex synthesis of core-shell nanoparticles, complicated etching or replacement steps, etc., to achieve low material cost and optimized energy conversion. Efficiency, simple method effect

Inactive Publication Date: 2017-06-06
JILIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires complex etching or replacement steps on the one hand, and the prepared samples can be used in practice.
On the other hand, the synthesis of such core-shell nanoparticles is usually complicated

Method used

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  • Method for adjusting distances, densities and optical properties of two-dimensional metal nano-particle arrays
  • Method for adjusting distances, densities and optical properties of two-dimensional metal nano-particle arrays
  • Method for adjusting distances, densities and optical properties of two-dimensional metal nano-particle arrays

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1) Cleaning and hydrophilization of the quartz substrate: place the quartz wafer in acetone and ultrasonically clean it for 5 minutes, then ultrasonically clean it with absolute ethanol for 5 minutes, and then wash it with deionized water for 5 times until no ethanol remains; Treatment solution (mass fraction is 98% concentrated sulfuric acid and mass fraction is the mixed solution of 30% hydrogen peroxide, the volume ratio of the two is 2:1) boil treatment 30min, then repeatedly wash with deionized water until no acid remains; Bake at 100°C for 30 minutes to obtain a quartz substrate with a dry, clean and hydrophilic surface;

[0026] 2) Preparation of polymer film substrate: Polystyrene solid particles were dissolved in toluene to obtain a solution with a mass fraction of 1.5%. Add 0.5mL polystyrene toluene solution dropwise on 1×1cm 2 On a quartz substrate, under the condition of 3000rpm, uniform glue for 1min, spin coating to form a film; then bake in an oven at 12...

example 1

[0031] 1) The cleaning and hydrophilization treatment methods of the quartz substrate are shown in Example 1;

[0032] 2) The preparation method of the polymer film substrate is shown in Example 1;

[0033] 3) The method for modifying the polymer film substrate with oxygen plasma is shown in Example 1;

[0034] 4) Place the polystyrene film treated in step 3) together with the quartz substrate on an electric heating plate at 100° C. for 15 minutes of thermal annealing, and then soak it in 0.5% polydiallyl di Into methyl ammonium chloride aqueous solution for 5 minutes, rinse with deionized water after taking it out, and blow dry with nitrogen;

[0035] 5) Soak the substrate obtained in step 4) in an aqueous solution of 18nm gold nanospheres for adsorption for 6 hours, rinse with deionized water and absolute ethanol in turn after taking it out, and finally dry it with nitrogen, and the obtained two-dimensional gold nanospheres The density of the particle array is 547.6 partic...

Embodiment 3

[0037] 1) The cleaning and hydrophilization treatment methods of the quartz substrate are shown in Example 1;

[0038] 2) The preparation method of the polymer film substrate is shown in Example 1;

[0039] 3) The method for modifying the polymer film substrate with oxygen plasma is shown in Example 1;

[0040] 4) Place the polystyrene film treated in step 3) together with the quartz substrate on an electric heating plate at 115° C. for 15 minutes of thermal annealing, and then soak it in 0.5% polydiallyl di Into methyl ammonium chloride aqueous solution for 5 minutes, rinse with deionized water after taking it out, and blow dry with nitrogen;

[0041] 5) Soak the substrate obtained in step 4) in an aqueous solution of 18nm gold nanospheres for adsorption for 6 hours, rinse with deionized water and absolute ethanol in turn after taking it out, and finally dry it with nitrogen, and the obtained two-dimensional gold nanospheres The density of the particle array is 529.6 partic...

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Abstract

The invention discloses a method for adjusting distances, densities and optical properties of two-dimensional metal nano-particle arrays, and belongs to the technical field of function materials. According to the method, the surface of an electroneutral polymer film substrate is treated by the aid of gas plasmas, so that the surface of the electroneutral polymer film substrate generates chemical groups with electric charges, thermal annealing treatment is performed at different temperatures, the surface of the electroneutral polymer film substrate adsorbs polyelectrolyte with positive electric charges by the aid of layer-by-layer self-assembly technologies, so that the substrate is provided with different densities of positive electric charges, and the substrate is soaked into pre-prepared metal nano-particle solution with reverse electric charges for long enough time, taken out and dried to obtain the two-dimensional metal nano-particle arrays of different particle distances, densities and optical properties. Heat sources with temperature gradients are applied to a thermal annealing step, samples with large-area gradients can be achieved, the distances, and gradient change of the densities of nano-particles of the samples and the intensities of absorption peaks and peak positions in spectrums are achieved in the whole samples.

Description

technical field [0001] The invention belongs to the technical field of functional materials, and specifically relates to a method for adjusting the spacing, density and optical properties of two-dimensional metal nanoparticle (nanospheres, nanorods, nanotriangles or nanocubes, etc.) arrays by regulating the surface charge density of a polymer film substrate. method of nature. Background technique [0002] Noble metal nanostructures have a special surface plasmon resonance property, which is characterized by the resonance of specific wavelengths of light with oscillating free electrons on the metal surface, thereby generating an enhanced electromagnetic field around the metal structure. Among them, the two-dimensional nanoparticle array is the most researched and applied one among the various noble metal nanostructures. Its special light scattering and absorption properties make it widely used in the fields of sensing, optoelectronic devices and sub-wavelength optical compon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B82B3/00B82Y20/00B82Y40/00G01N21/31
CPCB82B3/0061B82Y20/00B82Y40/00G01N21/314G01N2021/3148
Inventor 张俊虎叶顺盛王宏禹常玲霞杨柏
Owner JILIN UNIV
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