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Gold micro-nano composite structure array and preparation method thereof

A composite structure and array technology, applied in the direction of microstructure technology, microstructure devices, manufacturing microstructure devices, etc., can solve the problems of Raman signal inhomogeneity, uncertainty, inconsistency, etc., to eliminate interference peaks and improve the preparation process easy effect

Inactive Publication Date: 2012-09-19
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, both the nano-gold powder material and its preparation method have shortcomings. First, although the nano-gold powder material also has good optical properties, it can produce a strong surface plasmon resonance effect, making the local magnetic field The intensity is significantly enhanced. When some molecules are adsorbed on its surface, its Raman signal is significantly amplified, that is, the surface-enhanced Raman scattering (SERS) effect is generated. When the enhanced Raman scattering active substrate is used, the output Raman signal is not uniform; secondly, the preparation method not only cannot produce ordered gold nanomaterials, but also uses surfactants, which does not meet the principles of green synthesis and environmental friendliness. It has the disadvantage of complex and cumbersome preparation process

Method used

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  • Gold micro-nano composite structure array and preparation method thereof
  • Gold micro-nano composite structure array and preparation method thereof
  • Gold micro-nano composite structure array and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0025] The concrete steps of preparation are:

[0026] In step 1, a layer of gold film is deposited on the substrate by ion sputtering or vacuum evaporation; wherein, the substrate is conductive glass in a conductor substrate. Then, a single-layer colloidal crystal template composed of polystyrene colloidal spheres with a diameter of 2000 nm was placed on the substrate covered with gold film.

[0027] In step 2, the substrate covered with the gold film and the single-layer colloidal crystal template is heated at 100° C. for 10 minutes. Then it is placed in a chloroauric acid solution with a concentration of 0.3g / L, and it is used as a working electrode, and the deposition current density is 0.03mA / cm 2 (or 0.15mA / cm 2 ) under electrodeposition for 8 hours; wherein, the temperature during electrodeposition was 13° C., and the counter electrode during electrodeposition was a graphite electrode to obtain a complex array. Then the composite array was placed in dichloromethane s...

Embodiment 2

[0029] The concrete steps of preparation are:

[0030] In step 1, a layer of gold film is deposited on the substrate by ion sputtering or vacuum evaporation; wherein, the substrate is conductive glass in a conductor substrate. Then, a single-layer colloidal crystal template composed of polystyrene colloidal spheres with a diameter of 2000 nm was placed on the substrate covered with gold film.

[0031] In step 2, the substrate covered with the gold film and the single-layer colloidal crystal template is heated at 105° C. for 7.5 minutes. Then it is placed in a chloroauric acid solution with a concentration of 0.4g / L, and it is used as a working electrode, and the deposition current density is 0.035mA / cm 2 (or 0.23mA / cm 2 ) under electrodeposition for 6.5 h; wherein, the temperature during electrodeposition was 15° C., and the counter electrode during electrodeposition was a graphite electrode to obtain a complex array. Then the composite array was placed in dichloromethane s...

Embodiment 3

[0033] The concrete steps of preparation are:

[0034] In step 1, a layer of gold film is deposited on the substrate by ion sputtering or vacuum evaporation; wherein, the substrate is conductive glass in a conductor substrate. Then, a single-layer colloidal crystal template composed of polystyrene colloidal spheres with a diameter of 2000 nm was placed on the substrate covered with gold film.

[0035]In step 2, the substrate covered with the gold film and the single-layer colloidal crystal template is heated at 110° C. for 5 minutes. Then it is placed in a chloroauric acid solution with a concentration of 0.5g / L, and it is used as a working electrode, and the deposition current density is 0.04mA / cm 2 (or 0.3mA / cm 2 ) under electrodeposition for 5 h; wherein, the temperature during electrodeposition was 18° C., and the counter electrode during electrodeposition was a graphite electrode to obtain a complex array. Then the composite array was placed in dichloromethane solvent ...

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Abstract

The invention discloses a gold micro-nano composite structure array and a preparation method thereof. The array is a gold bowl array or a gold hollow sphere array disposed above a gold film covered on a substrate, wherein the diameter of a gold bow opening is from 500 nanometers to 10 micrometers, a bowl wall is composed of gold rods, the lengths of the gold rods are 100-1000 nanometers, the diameters of the gold rods are 50-400 nanometers, the inner diameter of a gold hollow sphere is from 500 nanometers to 10 micrometers, a sphere casing is composed of gold particles with diameters of 50-600 nanometers, and the thickness of the gold film is 5-25 nanometers. The preparation method includes sputtering a layer of the gold film on the substrate, placing a single layer colloidal crystal template which is composed of polystyrene colloidal spheres with diameters from 500 nanometers to 10 micrometers on the substrate which is covered with the gold film, then placing the substrate covered with the gold film and the colloidal crystal template into a chloroauric acid solution with concentration of 0.3-0.7g / L, using the solution with the substrate as a working electrode, subjecting the mixture to electro-deposition for 2-8 hours under the deposition electric current density of 0.03-0.05mA / cm<2> or 0.15-0.45mA / cm<2> to obtain a complex array, and placing the complex array in a dichloromethane solution for to removing the polystyrene colloidal spheres to obtain target products. The gold micro-nano composite structure array can be used as a surface enhanced raman scattering active substrate.

Description

technical field [0001] The invention relates to a composite structure array and a preparation method thereof, in particular to a gold micro-nano composite structure array and a preparation method thereof. Background technique [0002] Gold is a very good precious metal material, which has the advantages of stable physical and chemical properties and high electrical conductivity. The electrical, optical, thermal, and magnetic properties of nanomaterials are significantly different and superior to similar bulk materials, showing bright application prospects, and are known as the most promising materials in the 21st century. Based on the above factors, people have made unremitting efforts in order to obtain nano-gold materials, such as "a method for preparing a hollow nano-gold powder material" disclosed in the Chinese invention patent application publication specification CN 101433959A disclosed on May 20, 2009. ". In the preparation method, high-purity nitrogen gas is intro...

Claims

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Application Information

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IPC IPC(8): B81B7/04B81C1/00
Inventor 王晶晶段国韬刘广强蔡伟平
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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