SERS substrate loaded with noble metal nanoclusters with 3D network structure and preparation method

A network structure, precious metal technology, applied in measuring devices, instruments, material analysis by optical means, etc., can solve the problems of easy environmental pollution by surfactants and reducing agents, loss of SERS activity, complex preparation process, etc. The effect of clinical biomedical testing, less time-consuming and simple preparation process

Active Publication Date: 2018-03-20
广州启轩科技咨询有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high chemical activity of noble metals, these nanomaterials with special morphology are easy to deform and lose their SERS activity.
Moreover, the preparation process of these structures is complicated, the cost is high, and the residues of surfactants and reducing agents used in the experiment are easy to pollute the environment.

Method used

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  • SERS substrate loaded with noble metal nanoclusters with 3D network structure and preparation method
  • SERS substrate loaded with noble metal nanoclusters with 3D network structure and preparation method
  • SERS substrate loaded with noble metal nanoclusters with 3D network structure and preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Example 1 Preparation of a SERS substrate loaded with gold nanoclusters with a 3D network structure

[0023] The preparation method of the SERS substrate loaded with gold nanoclusters with a 3D network structure comprises the following steps:

[0024] Carbon fibers loaded with nickel cobalt oxide nanorods (i.e. flexible carbon cloth loaded with periodic 3D network three-dimensional structure nickel cobalt oxide) were prepared by hydrothermal reaction method, so that the nickel cobalt oxide nanorods grew into regular periodicity on the carbon fibers 3D mesh structure. The specific process is as follows: ultrasonically wash the carbon fibers in acetone, absolute ethanol and deionized water for 20-30 minutes respectively, and then dry them in a vacuum oven at 60°C for 12 hours; place the dried carbon fibers in a high-pressure reactor, Salt, nickel salt and ammonium fluoride were dissolved in deionized water at a molar ratio of 1:2:6 and injected into the above-mentioned h...

Embodiment 2

[0028] Example 2 Preparation of a SERS substrate loaded with silver nanoclusters with a 3D network structure

[0029] The preparation method of the SERS substrate loaded with silver nanoclusters with a 3D network structure comprises the following steps:

[0030] Carbon fibers loaded with nickel cobaltate nanorods (that is, carbon fibers loaded with periodic 3D network three-dimensional structure nickel cobaltate) were prepared by hydrothermal reaction method, so that nickel cobaltate nanorods grew into regular periodic 3D networks on carbon fibers Like structure, this method is described with embodiment 1.

[0031] The above-mentioned carbon fibers loaded with nickel cobaltate nanorods were placed in a radio frequency magnetron sputtering system, and the sputtering working pressure was controlled at 0.6Pa, the sputtering power was 80W, and the sputtering speed was The sputtering time was 80s, the sputtering thickness was 50nm, and the rotation speed was 15rpm. By sputtering ...

Embodiment 3

[0034] Example 3 Preparation of a SERS substrate loaded with copper nanoclusters with a 3D network structure

[0035] The preparation method of the SERS substrate loaded with copper nanoclusters with a 3D network structure comprises the following steps:

[0036] Carbon fibers loaded with nickel cobaltate nanorods (that is, carbon fibers loaded with periodic 3D network three-dimensional structure nickel cobaltate) were prepared by hydrothermal reaction method, so that nickel cobaltate nanorods grew into regular periodic 3D networks on carbon fibers Like structure, this method is described with embodiment 1.

[0037] The above-mentioned carbon fibers loaded with nickel cobalt oxide nanorods were placed in a radio frequency magnetron sputtering system, and the sputtering working pressure was controlled at 0.8Pa, the sputtering power was 100W, and the sputtering speed was The sputtering time was 100s, the sputtering thickness was 180nm, and the rotation speed was 18rpm. By sputt...

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Abstract

The invention provides a novel 3D-mesh-structure SERS substrate loaded with noble-metal nanoclusters and a preparing method thereof. According to the preparing method, a hydrothermal reaction method is used for preparing carbon fibers loaded with nickel cobaltate nanorods, the nickel cobaltate nanorods grow on the carbon fibers into a regular periodic 3D mesh structure, and then a magnetron sputtering technology is used for coating the surfaces of the carbon fibers loaded with the nickel cobaltate nanorods with noble-metal nanoparticles to obtain the 3D-mesh-structure SERS substrate loaded with the noble-metal nanoclusters. The novel 3D-mesh-structure SERS substrate has the advantages that formed nickel cobaltate of the 3D mesh stereochemical structure has rich tips and flat surfaces, which is beneficial for forming a great number of clustering structures on the noble-metal nanoparticles to generate powerful SERS signals. Meanwhile, due to the periodic structure, SERS hot spots are distributed uniformly, and stable and uniform signal output is achieved in actual detection. In addition, as the carbon fibers serve as a carrier, the prepared SERS substrate can be bent and cut, is easy to carry and can be applied to clinical biological medicine detection conveniently.

Description

technical field [0001] The invention relates to the fields of material engineering and nanotechnology, in particular to a SERS substrate with a 3D network structure loaded with noble metal nanoclusters and a preparation method. Background technique [0002] In recent years, due to their excellent catalytic, electrical, and optical properties, noble metal nanoparticles have been widely used in chemical reactions, drug delivery, microelectronics, and biosensing. In the field of biosensing, noble metal nanoparticles are usually used as surface-enhanced Raman scattering (SERS) substrates. SERS technology has excellent fingerprint identification characteristics, so it can detect substances with extremely low concentrations. This sensitive detection capability is mainly based on the enhanced local electromagnetic field formed by the localized surface plasmon resonance properties of noble metal nanoparticles. So far, in order to further enhance the SERS signal strength, a large nu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/65
CPCG01N21/658
Inventor 姜涛周骏王晓龙张利赵子奇
Owner 广州启轩科技咨询有限公司
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