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

A gold nanoparticle and silver nanotechnology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of inability to make an ordered array of gaps, and achieve stable structure and scientific preparation method Effect

Inactive Publication Date: 2015-04-29
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 specific steps of preparation are:

[0044] Step 1. Firstly, the obtained through-hole alumina template with a pore diameter of 50 nm and a hole center distance of 100 nm is expanded, that is, the through-hole alumina template is immersed in a phosphoric acid solution with a temperature of 35°C and a concentration of 4 wt% For 18 minutes, a through-hole alumina template with a hole diameter of 85 nm was obtained. Then use the ion sputtering instrument to plate the silver film on the side of the through-hole aluminum oxide template; where the ion sputtering current is 4mA and the time is 20min when the silver film is plated, and one side is covered with a silver film and the holes are agglomerated with silver nano-hemispheres. Alumina template.

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

Embodiment 2

[0048] The specific steps of preparation are:

[0049] Step 1. Firstly, the obtained through-hole alumina template with a hole diameter of 55nm and a hole center distance of 100nm is expanded, that is, the through-hole alumina template is placed in a phosphoric acid solution with a temperature of 38°C and a concentration of 4.5wt% After soaking for 19 minutes, a through-hole alumina template with a hole diameter of 88 nm was obtained. Then use the ion sputtering instrument to plate the silver film on the side of the through-hole alumina template; the current of the ion sputtering during the silver plating is 4.5mA and the time is 20min, and one side is covered with a silver film and the holes are agglomerated with silver nano Hemispherical alumina template.

[0050] Step 2: First heat the aluminum oxide template with a silver film on one side and silver nano-hemispheres agglomerated in the holes to 120° C., and then apply paraffin wax on the surface of the silver film. Then, the ...

Embodiment 3

[0053] The specific steps of preparation are:

[0054] Step 1. Firstly, the obtained through-hole alumina template with a pore diameter of 60nm and a hole center distance of 100nm is expanded, that is, the through-hole alumina template is soaked in a phosphoric acid solution at a temperature of 40°C and a concentration of 5wt% In 20 minutes, a through-hole alumina template with a pore diameter of 90 nm is obtained. Then use the ion sputtering instrument to plate the silver film on the side of the through-hole aluminum oxide template; where the ion sputtering current is 5mA and the time is 20min when the silver film is plated, and one side is covered with a silver film and the holes are agglomerated with silver nano hemispheres. Alumina template.

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

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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 a preparation method and application thereof, in particular to a gold nanoparticle-silver nano hemispherical array and a preparation method and application thereof. Background technique [0002] Surface Enhanced Raman Scattering (SERS) technology is one of the most sensitive on-site spectroscopy techniques for studying surface adsorption and interface reactions. 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, people have found that among the materials that can produce the SERS effect, the enhancement effect of Ag is the best and the most commonly used. For this purpose, 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 use are published. The active substrate is composed of an aluminum sheet wit...

Claims

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Application Information

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Patent Type & Authority Patents(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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