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Preparation method of bitter gourd-shaped CuO nanoparticle SERS substrate

A nanoparticle, bitter gourd-like technology, which is applied in the field of CuO nanoparticle SERS substrate preparation, can solve the problem of less CuO nanoparticle SERS substrate, and achieve the effect of low cost, high surface roughness and uniform distribution

Active Publication Date: 2020-07-17
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although in ZnO, Cu 2 O and other metal oxide superstructure SERS substrates have been successfully prepared, but there are few reports on CuO nanoparticle SERS substrates based on high surface roughness and surface superstructure.

Method used

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  • Preparation method of bitter gourd-shaped CuO nanoparticle SERS substrate
  • Preparation method of bitter gourd-shaped CuO nanoparticle SERS substrate
  • Preparation method of bitter gourd-shaped CuO nanoparticle SERS substrate

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preparation example Construction

[0022] A method for preparing a bitter gourd-like CuO nanoparticle SERS substrate, comprising the following steps:

[0023] Step 1: Prepare sodium hydroxide mother liquor: Weigh 0.064g of sodium hydroxide solid into a beaker, add 100mL of deionized water, and prepare a sodium hydroxide mother liquor with a concentration of 16mmol / L;

[0024] Step 2: Prepare copper acetate mother liquor: Weigh 0.16g copper acetate solid and put it into a beaker, add 100mL deionized water, and prepare copper acetate mother liquor with a concentration of 8mmol / L;

[0025] Step 3: Prepare the mixed solution A: Weigh the glucose powder and add it to the prepared sodium hydroxide solution. The ratio of glucose to sodium hydroxide is 1:2. Stir the solution evenly with a glass rod to obtain a mixed solution. Solution A;

[0026] Step 4: Prepare mixed solution B: Weigh polyvinylpyrrolidone solid powder with a K value of 17 and add it to the prepared copper acetate solution, wherein the ratio of copper...

Embodiment

[0032] Take the hydrothermal reaction time of 6 hours as an example for specific description below:

[0033] Step 1: Measure 25mL of sodium hydroxide mother liquor and pour it into a beaker;

[0034] Step 2: Measure 25mL of copper acetate mother liquor and pour it into a beaker;

[0035] Step 3: Weigh 0.036g of glucose powder, add it into the sodium hydroxide solution measured in Step 1, and stir to obtain the mixed solution A;

[0036] Step 4: Weigh 0.022g of polyvinylpyrrolidone powder and add it to the copper acetate solution measured in Step 2, stir continuously on a constant temperature magnetic stirrer at a speed of 600rpm, and obtain a mixed solution B after stirring for 10 minutes;

[0037] Step 5: Pour the mixed solution A into the mixed solution B at a constant speed and continue stirring, and the reaction time is 60 minutes;

[0038] Step 6: Pour the mixed solution obtained in Step 5 into a hydrothermal reaction kettle, and immediately put it into a blast drying o...

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Abstract

The invention provides a preparation method of a bitter gourd-shaped CuO nanoparticle SERS substrate, and belongs to the technical field of SERS. The preparation method comprises the following steps:mixing sodium hydroxide, glucose, copper acetate and a polyvinylpyrrolidone solution, and subjecting the mixed solution to hydrothermal reaction to obtain the bitter gourd-shaped CuO nanoparticles, wherein the molar ratio of sodium hydroxide to glucose to copper acetate to polyvinylpyrrolidone is 2: 1: 1: 1, the hydrothermal reaction temperature is 60 DEG C, and the hydrothermal reaction time is 5-7 hours; dissolving CuO nanoparticles into deionized water, dripping a solution onto a substrate by using a dropper, putting the substrate into a vacuum drying oven, and drying for 6 hours at the drying temperature of 50 DEG C to obtain the bitter gourd-shaped CuO nanoparticle SERS substrate. The method has the advantages of simple preparation process, low cost, good uniformity of the prepared substrate, high surface roughness, high sensitivity, good stability and the like.

Description

technical field [0001] The invention relates to a method for preparing a SERS substrate, in particular to a method for preparing a CuO nanoparticle SERS substrate, and belongs to the technical field of SERS. Background technique [0002] Surface-enhanced Raman scattering (SERS) is widely used in various fields such as biomedicine, chemical engineering, agriculture and food due to its high sensitivity, rapid detection, and the ability to provide molecular structure information. The mechanism of SERS enhancement mainly lies in the electromagnetic enhancement (EM) induced by surface plasmon resonance (LSPR) and the chemical enhancement (CM) induced by electron migration (CT), among which LSPR occupies a dominant position. Therefore, the strength of the SERS signal largely depends on the SERS substrate enhancement effect. Currently, noble metals (Au, Ag, and Cu) have strong LSPR and are widely used as SERS substrate materials. These three metals have the property of covering m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G3/02B82Y40/00G01N21/65
CPCC01G3/02B82Y40/00G01N21/658C01P2004/30C01P2004/03C01P2002/72C01P2002/85C01P2002/82
Inventor 孟琪黄杰沈为民梁培曹宇周勇峰
Owner CHINA JILIANG UNIV