Top silver-cladding gold nanorod array and preparation method and application thereof

A gold nanorod and silver-coated technology, which is applied to the gold nanorod array and its preparation field coated with silver on the top, can solve the problems of poor gold nanowire array, unstable SERS activity, and affecting SERS effect, and achieve enhanced enhancement Peak, excellent array, good array effect

Inactive Publication Date: 2011-05-04
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

However, both the gold nanowire array with gold film, its preparation method, and the trace detection of organic matter have shortcomings. First, the gold nanowire array is grown and attached to the gold film. , too thin gold film is easy to break and it is difficult to firmly support the gold nanowire array, so that not only cannot obtain a large-area gold nanowire array that meets the requirements of the SERS effect that can be practically applied, but also makes the array of gold nanowires poor. It is impossible to maintain obvious and uniform gaps between adjacent gold nanowires in the array, which leads to unstable SERS activity and cannot meet the stringent requirements of the ideal SERS effect on the arrangement of gold nanowires in a highly regular order; secondly, Restri

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  • Top silver-cladding gold nanorod array and preparation method and application thereof
  • Top silver-cladding gold nanorod array and preparation method and application thereof
  • Top silver-cladding gold nanorod array and preparation method and application thereof

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Embodiment 1

[0028] The concrete steps of preparation are:

[0029] Step 1: Coating a liquid organic matter on the gold film on the side where the gold nanorod array is not grown, wherein the liquid organic matter is α-ethyl cyanoacrylate; organic substrate. Then place the aluminum oxide template with a gold film deposited on one side, gold nanorod arrays deposited in the holes, and organic matter coated on the gold film in an acid or alkaline solution to corrode the aluminum oxide template; figure 1 b and figure 1 as shown in c, and as figure 1 The gold nanorod array shown by the curve in d.

[0030] Step 2, using thin film evaporation technology to evaporate silver on the top of the gold nanorod array, wherein the thin film evaporation technology uses ion sputtering technology (or electron beam evaporation technology or vacuum evaporation technology), and its sputtering current is 3.5mA, The sputtering time is 0.5 min. The diameter of the obtained silver nanoparticles is 60nm, which...

Embodiment 2

[0033] The concrete steps of preparation are:

[0034] Step 1: Coating a liquid organic matter on the gold film on the side where the gold nanorod array is not grown, wherein the liquid organic matter is α-ethyl cyanoacrylate; organic substrate. Then place the aluminum oxide template with a gold film deposited on one side, gold nanorod arrays deposited in the holes, and organic matter coated on the gold film in an acid or alkaline solution to corrode the aluminum oxide template; figure 1 b and figure 1 as shown in c, and as figure 1 The gold nanorod array shown by the curve in d.

[0035] Step 2, using thin film evaporation technology to evaporate silver on the top of the gold nanorod array, wherein the thin film evaporation technology uses ion sputtering technology (or electron beam evaporation technology or vacuum evaporation technology), and its sputtering current is 3.25mA, The sputtering time is 1 min. The diameter of the obtained silver nanoparticles is 68nm, which ...

Embodiment 3

[0038] The concrete steps of preparation are:

[0039] Step 1: Coating a liquid organic matter on the gold film on the side where the gold nanorod array is not grown, wherein the liquid organic matter is α-ethyl cyanoacrylate; organic substrate. Then place the aluminum oxide template with a gold film deposited on one side, gold nanorod arrays deposited in the holes, and organic matter coated on the gold film in an acid or alkaline solution to corrode the aluminum oxide template; figure 1 b and figure 1 as shown in c, and as figure 1 The gold nanorod array shown by the curve in d.

[0040] Step 2, using thin film evaporation technology to evaporate silver on the top of the gold nanorod array, wherein the thin film evaporation technology adopts ion sputtering technology (or electron beam evaporation technology or vacuum evaporation technology), and its sputtering current is 3mA, sputtering The injection time is 3 minutes. Silver nanoparticles with a diameter of 75 nm, such ...

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Abstract

The invention discloses a top silver-cladding gold nanorod array and a preparation method and application thereof. In the array, a gold film is provided with a gold nanorod array of which the top end is cladded with silver nanoparticles with the diameters of between 60 and 90nm, and the bottom surface is provided with an organic matter substrate with the thickness of between 50 and 100 mu m. The method comprises the following steps of: evaporating the gold film on one side of a nano through-hole alumina template, and growing the gold nanorod array in the hole of the template, particularly coating a liquid organic matter on the gold film on one side on which the gold nanorod array does not grow; evaporating the gold film on one side after the liquid organic matter is cured; placing the alumina template of which the hole is deposited with the gold nanorod array and the gold film is coated with the organic matter in acid or alkali solution; etching off the template; and evaporating silver on the top of the gold nanorod array by film evaporating technology to obtain the top silver-cladding gold nanorod array. A trace amount of organic matter rhodamine or 2,3,3'-trichlorodiphenyl can be detected by using the surface enhanced raman scattering effect of the top silver-cladding gold nanorod array.

Description

technical field [0001] The invention relates to a nanorod array, a preparation method and an application thereof, in particular to a gold nanorod array whose top is coated with silver, a preparation method and an application thereof. Background technique [0002] In recent years, the surface-enhanced Raman scattering (SERS) effect of the nanostructures of precious metals gold, silver, and copper has aroused widespread concern among scientific and technical personnel. play an important role in biochemistry and trace detection of organic matter. At present, in order to obtain the nanostructure of the noble metal gold and use it in the trace detection of organic matter, they have made some attempts and efforts, such as in the journal "Spectroscopy and Spectral Analysis", Volume 28, Issue 10, published in October 2008 published an article titled "The Influence of Film Structure on the Surface-enhanced Raman Scattering of Gold Nanowire Arrays". 4-MP) as a probe molecule, it was...

Claims

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Application Information

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IPC IPC(8): C23C28/02C25D5/02
Inventor 黄竹林孟国文唐朝龙朱储红李祥东
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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