Ordered hole array with gold-nanoparticle-based micro-nanometer composite structure and preparation method for ordered hole array

A gold nanoparticle and composite structure technology, applied in electrolysis process, electroforming and other directions, can solve the problems of poor stability and insufficient activity of microstructured hole arrays, and achieve high production efficiency, enhanced stability, and less materials. Effect

Inactive Publication Date: 2013-01-16
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, there are shortcomings in both the array and its preparation method. First, the final product is only a stack of gold nanopores placed in the pores of the microparticles to form a two-dimensional double-period ordered structure array. Although it has a micro-nano composite structure, it not only has the problem of poor stability of the microstructure hole array, but also faces the problem of insufficient activity when it is used as a surface-enhanced Raman scattering substrate; secondly, the preparation method cannot produce The final product with stable microstructure pore array and high activity

Method used

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  • Ordered hole array with gold-nanoparticle-based micro-nanometer composite structure and preparation method for ordered hole array
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Embodiment 1

[0026] The specific steps of preparation are:

[0027] Step 1, firstly placing a single-layer colloidal crystal template composed of polystyrene colloidal spheres with a sphere diameter of 0.3 μm on a conductive substrate; wherein the conductive substrate is conductive glass. Then, the conductive substrate on which the single-layer colloidal crystal template is placed is placed in the gold electrolyte, which is used as the working electrode, and the current density is 0.1 mA / cm. 2 The three-electrode method was used for electrodeposition for 60 min; wherein, the counter electrode during electrodeposition was a graphite electrode, and the reference electrode was a saturated calomel electrode to obtain a composite array.

[0028] In step 2, the composite array is first placed in a dichloromethane solvent to remove the polystyrene colloid spheres to obtain a gold body array. The gold body array was then placed in a potassium chloride solution with a concentration of 0.05mol / L fo...

Embodiment 2

[0030] The specific steps of preparation are:

[0031] Step 1, firstly placing a single-layer colloidal crystal template composed of polystyrene colloidal spheres with a sphere diameter of 0.3 μm on a conductive substrate; wherein the conductive substrate is conductive glass. Then, the conductive substrate with the single-layer colloidal crystal template placed on it is placed in the gold electrolyte, and it is used as the working electrode, and the current density is 0.5 mA / cm. 2 The three-electrode method was used for electrodeposition for 45 min; wherein, the counter electrode during electrodeposition was a graphite electrode, and the reference electrode was a saturated calomel electrode to obtain a composite array.

[0032] In step 2, the composite array is first placed in a dichloromethane solvent to remove the polystyrene colloid spheres to obtain a gold body array. The gold body array was then placed in a potassium chloride solution with a concentration of 0.1 mol / L fo...

Embodiment 3

[0034] The specific steps of preparation are:

[0035] In step 1, a single-layer colloidal crystal template composed of polystyrene colloidal spheres with a sphere diameter of 0.3 μm is firstly placed on a conductive substrate; wherein, the conductive substrate is conductive glass. Then, the conductive substrate with the single-layer colloidal crystal template placed on it is placed in the gold electrolyte, and it is used as the working electrode, and the current density is 1 mA / cm. 2The three-electrode method was used for electrodeposition for 30 minutes; wherein, the counter electrode during electrodeposition was a graphite electrode, and the reference electrode was a saturated calomel electrode to obtain a complex array.

[0036] In step 2, the complex array is placed in a dichloromethane solvent to remove the polystyrene colloidal balls to obtain the gold array. Then place the gold body array in a potassium chloride solution with a concentration of 0.15mol / L for electroch...

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Abstract

The invention discloses an ordered hole array with a gold-nanoparticle-based micro-nanometer composite structure and a preparation method for the ordered hole array. According to the array, gold particles which form a wall of the ordered hole array are accumulated on a conducting substrate, the spacing of ordered holes is 0.1 to 30mu m, the particle size of each gold particle is 10 to 100nm, and 1 to 300 layers of gold particles are accumulated. The method comprises the following steps of: putting a single-layer colloidal crystal template on the conducting substrate; putting the conducting substrate into a gold electrolyte and electrodepositing to obtain a complex array; dissolving polystyrene colloidal spheres in the complex array to obtain a gold body array; and putting the gold body array into a potassium chloride solution for electrochemical oxidation-reduction circulation treatment, wherein the process of the electrochemical oxidation-reduction circulation treatment is that: the voltage begins from -0.3V, linearly rises to 1.2V at the rate of 1V / s, remains for 1.2s, and linearly drops to -0.3V at the rate of 0.5V / s, and the operation is circulated for 5 to 35 times to obtain a target product. The target product can be widely used for catalysis, electrochemistry and surface-enhanced Raman scattering active substrates.

Description

technical field [0001] The invention relates to an ordered hole array of a micro-nano composite structure and a preparation method, in particular to an ordered hole array of a gold nanoparticle-based micro-nano composite structure and a preparation method thereof. Background technique [0002] Gold nanostructured hole arrays have important applications in the fields of catalysis, electrochemistry, and surface-enhanced Raman scattering active substrates. Micro-nano composite structure is another type of material structure system that has attracted wide attention. It has the advantages of both microstructure and nanostructure materials, strong coupling effect, high surface activity, and stable structure. It has important application value and can be widely used. for high activity, high stability and reproducibility devices. Based on the above factors, people have made unremitting efforts to obtain gold micro-nano structured materials, as mentioned in a Chinese invention paten...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D1/08C25D5/00C25D3/48
Inventor 段国韬罗媛媛李越刘广强蔡伟平
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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