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Tungsten oxide substrate with surface-enhanced Raman scattering function and preparation method thereof

A surface-enhanced Raman and tungsten oxide technology is applied in the directions of Raman scattering, anodic oxidation, sputtering coating, etc., which can solve the problems of inconvenient use, complicated SERS substrate preparation process, and high cost, and achieve good repeatability, Enhanced Raman scattering effect, good surface effect

Active Publication Date: 2019-03-12
SOUTHEAST UNIV
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Problems solved by technology

[0003] The surface-enhanced Raman spectroscopy experiment is mainly dominated by rough metal surface adsorption, especially precious metals (such as gold, silver, copper). This hinders the widespread application of this technology

Method used

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  • Tungsten oxide substrate with surface-enhanced Raman scattering function and preparation method thereof
  • Tungsten oxide substrate with surface-enhanced Raman scattering function and preparation method thereof

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preparation example Construction

[0021] The preparation method of the tungsten oxide substrate with surface-enhanced Raman scattering function of the present invention specifically comprises the following steps:

[0022] The first step is to use anodized aluminum for deoxidation to obtain an aluminum bowl with a micro-nano ordered structure as the substrate material; put the aluminum sheet in acetone and ultrapure water for ultrasonic cleaning, and then perform electrochemical polishing to remove the surface The oxide layer and impurities are removed, and then anodized to produce ordered aluminum oxide on the surface. The generated alumina is put into a deoxidizer for deoxidation treatment to obtain an aluminum bowl with a micro-nano ordered structure.

[0023] In the second step, magnetron sputtering is used to sputter tungsten oxide nano-films on the substrate. The sputtering gas atmosphere is Ar / O2 mixed gas (the gas flow ratio is about 1:1), and the target material can be high-purity tungsten. Target or ...

example

[0032] (1), using secondary or multiple anodizing methods to prepare aluminum bowl substrates with micro-nano structures

[0033] First, pure aluminum sheet (length*width*height: 3cm*3cm*0.05cm, purity 99.99%) is placed in acetone and ultrapure water for ultrasonic cleaning to remove surface organic matter and other impurities. Then put the cleaned aluminum sheet into a polishing solution (volume ratio of ethanol:perchloric acid=4:1) for electrochemical polishing to remove the surface oxide layer and impurities.

[0034] After the polished aluminum sheet is cleaned, it is subjected to secondary or multiple anodic oxidation treatments to produce ordered nano-alumina on the surface. Among them, the aluminum sheet is used as the anode, the molybdenum sheet is used as the cathode, the oxidation solution is 0.5M / L oxalic acid solution, and the time for each oxidation reaction is 2h.

[0035] After the oxidation of the aluminum sheet is completed, the sample is put into the deoxidi...

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Abstract

The invention discloses a tungsten oxide substrate with a surface reinforced Raman scattering function and a preparation method thereof. The nanomaterial substrate is obtained by preparing a tungsten oxide nanofilm on a nanometer aluminum bowl substrate and performing related oxygen content adjustment. The preparation method uses a nanometer aluminum bowl obtained by twice or multiple anodic oxidation as the substrate, adopts a magnetron sputtering method to prepare the tungsten oxide nanofilm on the substrate, and uses the annealing treatment for adjusting the oxygen content to realize preparation of the tungsten oxide nanomaterial substrate with the surface reinforced Raman scattering function. The tungsten oxide substrate has the advantages of simple preparation process and low cost, realizes ordered structure control, and is higher in surface reinforced Raman scattering effect.

Description

technical field [0001] The invention relates to the technical field of laser Raman detection and the field of nanomaterials, in particular to an active substrate with enhanced Raman scattering effect on the surface and a preparation method thereof. Background technique [0002] Surface-enhanced Raman scattering (SERS) technology is a very important technology in modern detection technology. SERS technology can be widely used in many fields such as electrochemistry, surface science, biological analysis, food, medical detection, etc. due to its high sensitivity, low fluorescence background, non-destructive to the detection sample, and stable characteristic peaks. [0003] The surface-enhanced Raman spectroscopy experiment is mainly dominated by rough metal surface adsorption, especially precious metals (such as gold, silver, copper). This hinders the widespread application of this technology. The surface-enhanced Raman scattering technique of transition metal oxide (such as ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C14/35C23C14/08C23C14/02C23C14/58C25D11/04G01N21/65
CPCC23C14/0036C23C14/02C23C14/083C23C14/35C23C14/5806C25D11/04G01N21/658
Inventor 罗正位范兴策邱腾
Owner SOUTHEAST UNIV
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