Gold micron feather cluster modified with silver nanoparticles and preparation method and application thereof

A technology of silver nanoparticles and gold nanoparticles, which is applied in the field of silver nanoparticle-modified gold micro-plume clusters and its preparation, can solve the problem of hindering the enhancement of Raman scattering signals, the weakening of Raman signals, and the reduction of incident light utilization efficiency, etc. problem, to achieve the effect of improving the overall SERS activity, increasing the electromagnetic field enhancement, and facilitating effective adsorption

Inactive Publication Date: 2013-07-10
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, there are deficiencies in both the product and its preparation method. First, although the product has the ability to recognize biological probes, it has limited contribution to the enhancement of SERS activity because it is a monomer with a core-shell structure. Composing many monomers into a SERS substrate makes its structure unstable because it is difficult to form a fixed shape; secondly, the silicon dioxide layer formed outside the silver nanoparticle layer hinders the enhancement of the surface by silver nanoparticles when

Method used

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  • Gold micron feather cluster modified with silver nanoparticles and preparation method and application thereof
  • Gold micron feather cluster modified with silver nanoparticles and preparation method and application thereof
  • Gold micron feather cluster modified with silver nanoparticles and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] The concrete steps of preparation are:

[0031] Step 1, first place the aluminum sheet in an oxalic acid solution with a temperature of 6°C and a concentration of 0.2mol / L, anodize it at a DC voltage of 35V for 7 hours, and then place it in a phosphoric acid solution with a temperature of 55°C and a concentration of 5wt%. and 2wt% chromic acid in the mixed solution of immersion 11h; Obtain the aluminum sheet with the array of hexagonal ordered bowl-shaped pits on the surface, wherein, the pit diameter of the bowl-shaped pits that constitute the array of bowl-shaped pits is 30nm, The pit center distance is 50nm. Then place the aluminum sheet with a hexagonal array of bowl-shaped pits on the surface in a magnetron sputtering apparatus for ion sputtering; during sputtering, the distance between it and the gold target is 2cm, and the sputtering current is 15mA 1. The sputtering time is 4 minutes, and the aluminum sheet covered with gold nanoparticles and with a hexagonal a...

Embodiment 2

[0034] The concrete steps of preparation are:

[0035] Step 1, first place the aluminum sheet in an oxalic acid solution with a temperature of 7°C and a concentration of 0.25mol / L, anodize it at a DC voltage of 38V for 6.5h, then place it at a temperature of 58°C and a concentration of 5.5wt% 10.5h in the mixed solution of phosphoric acid and 1.9wt% chromic acid; Obtain an aluminum sheet with a hexagonal array of bowl-shaped pits arranged in an orderly manner on the surface, wherein the pits of the bowl-shaped pits that constitute the array of bowl-shaped pits The diameter is 48nm, and the pit center distance is 68nm. Then place the aluminum sheet with a hexagonal array of bowl-shaped pits on the surface in a magnetron sputtering apparatus for ion sputtering; during sputtering, the distance between it and the gold target is 2cm, and the sputtering current is 15mA 1. The sputtering time is 6 minutes, and the aluminum sheet covered with the gold nanoparticles and the bowl-shape...

Embodiment 3

[0038] The concrete steps of preparation are:

[0039] Step 1, first place the aluminum sheet in an oxalic acid solution with a temperature of 8°C and a concentration of 0.3mol / L, anodize it at a DC voltage of 40V for 6 hours, and then place it in a phosphoric acid solution with a temperature of 60°C and a concentration of 6wt%. and 1.8wt% chromic acid in the mixed solution soaking 10h; Obtain the aluminum plate with the hexagonal array of bowl-shaped pits arranged in an orderly manner on the surface, wherein the diameter of the bowl-shaped pits forming the bowl-shaped pit array is 65nm , The pit center distance is 85nm. Then place the aluminum sheet with a hexagonal array of bowl-shaped pits on the surface in a magnetron sputtering apparatus for ion sputtering; during sputtering, the distance between it and the gold target is 2cm, and the sputtering current is 15mA 1. The sputtering time is 8 minutes, and the aluminum sheet covered with gold nanoparticles and with a hexagona...

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Abstract

The invention discloses a gold micron feather cluster modified with silver nanoparticles and a preparation method and application thereof. The gold micron feather cluster is characterized in that the silver nanoparticles are coated on an aluminum sheet, of which the surface is provided with pit arrays, wherein the particle diameter of the silver nanoparticles is 15-25 nm, and the gold micron feather cluster has the diameter of 32-658 microns and consists of gold micron feathers which consist of gold nanoparticles with the particle diameter of 200 nm to 1 micron and have the feather rod length of 16-329 microns, the feather branch length of 8-160 microns and the small feather branch length of 2-13 microns. The method comprises the following steps of: firstly obtaining the aluminum sheet, of which the surface is provided with the pit arrays which are hexagonally arranged in an orderly manner and are bowl-shaped, by using an anodic oxidation method; carrying out gold nanoparticle ion sputtering on the aluminum sheet so as to obtain the aluminum sheet coated with the gold nanoparticles; then putting the aluminum sheet coated with the gold nanoparticles in an argon atmosphere, and annealing so as to obtain the aluminum sheet coated with the gold micron feather cluster; and carrying out silver nanoparticle ion sputtering on the aluminum sheet coated with the gold micron feather cluster, thereby producing a target product. The gold micron feather cluster modified with the silver nanoparticles can serve as a surface-enhanced Raman scattering active substrate, and the content of rhodamine or tetrachlorobiphenyl attached onto the gold micron feather cluster is measured by using a laser Raman spectrometer.

Description

technical field [0001] The invention relates to a micron plume cluster and its preparation method and application, in particular to a gold micron feather cluster modified with silver nanoparticles and its preparation method and application. Background technique [0002] Silver, a precious metal with excellent ductility, electrical conductivity, thermal conductivity, and chemical stability, has been widely used in many fields. Recently, people have made various attempts and efforts in order to further explore and expand the application range of precious metal silver, such as "a kind of SERS biological probe and its Preparation". The description of the patent application for this invention describes a SERS bioprobe in which a silver nanoparticle layer and a silicon dioxide layer are sequentially formed outside the solid silicon dioxide particles, wherein the silver nanoparticle layer and the silicon dioxide layer are connected by a pulley. Mann signal molecules, the surface ...

Claims

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Application Information

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IPC IPC(8): C23C28/02C25D11/10C23C14/35C23C14/16G01N21/65
Inventor 侯超孟国文朱储红黄竹林陈斌孙克喜
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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