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Gold nanoparticle-silver nano-semisphere array as well as preparation method and application thereof

A gold nanoparticle, silver nanoparticle technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as the inability to obtain interstitial ordered arrays, and achieve structural stability and preparation methods. effect of science

Inactive Publication Date: 2013-12-18
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, the preparation method cannot produce an ordered array of silver nanoparticles with a gap of ≤10nm.

Method used

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  • Gold nanoparticle-silver nano-semisphere array as well as preparation method and application thereof
  • Gold nanoparticle-silver nano-semisphere array as well as preparation method and application thereof
  • Gold nanoparticle-silver nano-semisphere array as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] The concrete steps of preparation are:

[0044] Step 1. First, expand the through-hole alumina template with a hole diameter of 50nm and a hole center distance of 100nm. Soak the through-hole alumina template in a phosphoric acid solution with a temperature of 35°C and a concentration of 4wt%. After 18 minutes, a through-hole alumina template with a pore diameter of 85 nm was obtained. Then use an ion sputtering device to plate a silver film on one side of the through-hole alumina template; wherein, the ion sputtering current is 4mA and the time is 20min when the silver film is plated, so that one side is covered with a silver film and silver nanohemispheres are agglomerated in the holes. alumina template.

[0045] In step 2, the aluminum oxide template covered with silver film on one side and silver nano-hemispheres agglomerated in the holes is heated to 115° C., and then the surface of the silver film is coated with paraffin wax. Then, the substrate is adhered and f...

Embodiment 2

[0048] The concrete steps of preparation are:

[0049] Step 1. First, expand the through-hole alumina template with a hole diameter of 55nm and a hole center distance of 100nm, that is, place the through-hole alumina template in a phosphoric acid solution with a temperature of 38°C and a concentration of 4.5wt%. Soak for 19 minutes to obtain a through-hole alumina template with a pore diameter of 88 nm. Then use an ion sputtering device to plate a silver film on one side of the through-hole alumina template; wherein, the ion sputtering current is 4.5mA and the time is 20min when the silver film is plated. Alumina template for hemispheres.

[0050] In step 2, the aluminum oxide template covered with silver film on one side and silver nano-hemispheres agglomerated in the holes is heated to 120° C., and then paraffin wax is coated on the surface of the silver film. Then, the substrate is adhered and fixed on the surface of the silver film, and after cooling, an aluminum oxide t...

Embodiment 3

[0053] The concrete steps of preparation are:

[0054] Step 1. First, expand the through-hole alumina template with a hole diameter of 60nm and a hole center distance of 100nm. Soak the through-hole alumina template in a phosphoric acid solution with a temperature of 40°C and a concentration of 5wt%. After 20 minutes, a through-hole alumina template with a pore diameter of 90 nm was obtained. Then use an ion sputtering device to plate a silver film on one side of the through-hole alumina template; wherein, when the silver film is plated, the current of ion sputtering is 5mA, and the time is 20min, so that one side is covered with a silver film and silver nanohemispheres are agglomerated in the holes. alumina template.

[0055] In step 2, the aluminum oxide template covered with silver film on one side and silver nano-hemispheres aggregated in the holes is heated to 125° C., and then the surface of the silver film is coated with paraffin wax. Then, the substrate is adhered an...

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Abstract

The invention discloses a gold nanoparticle-silver nano-semisphere array as well as a preparation method and the application of the array. The array is an ordered array which is placed on a silver membrane of a substrate and attached with silver nano-semispheres, wherein the sphere diameter of the silver nano-semisphere is 85-95 nm; the sphere interval is less than or equal to 10 nm; the gold nanoparticles are modified on the silver nano-semispheres; the particle size of the gold nanoparticle is 5-10 nm. The preparation method comprises the following steps: sequentially performing secondary anodic oxidation, reaming treatment and silver membrane plating on one side of an aluminum sheet, so as to obtain an aluminum oxide template covered with the silver membrane on one side and collected with the silver nano-semispheres in the hole; adhering and fixing the substrate to the silver membrane; then, placing the aluminum oxide template covered with the silver membrane and the substrate on one side and collected with the silver nano-semispheres in the hole in an alkali solution to etch off the aluminum oxide template, and then putting the rest in an ion sputtering device to perform gold sputtering for 8-12 s under the sputtering current is 35-45 mA, so as to obtain the objective product. The array can be taken as an active substrate for enhancing raman scattering on the surface, so that the content of trace rhodamine or polychlorinated biphenyl 3 attached on the array can be measured by a laser raman spectrometer.

Description

technical field [0001] The invention relates to a hemispherical array and its preparation method and application, in particular to a gold nanoparticle-silver nano hemispherical array and its preparation method and application. Background technique [0002] Surface-enhanced Raman scattering (SERS) technique is one of the most sensitive in situ spectroscopy techniques for studying surface adsorption and interfacial reactions today. As we all know, it is affected by many factors, and the influence of materials is one of the most important aspects. In recent years, it has been found that among the materials that can produce SERS effect, the enhancement effect of Ag is the best and most commonly used. For this reason, various attempts and efforts have been made, such as the Chinese invention patent application CN103194752A on July 10, 2013 A SERS active substrate and its preparation method and application are disclosed. The active substrate consists of an aluminum sheet with an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00C23C14/34C23C14/14G01N21/65B81C1/00B82Y30/00B82Y40/00
Inventor 唐海宾孟国文李中波朱储红黄竹林张倬
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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