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Surface enhanced Raman scattering substrate for detecting pesticides, and production method and application thereof

A surface-enhanced Raman and substrate technology, applied in Raman scattering, measuring devices, sputtering, etc., can solve the problems of poor repeatability, high cost, complicated preparation process, etc., and achieve low detection cost and fast detection speed. , the effect of simple preparation process

Inactive Publication Date: 2017-04-26
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These technologies are relatively mature nanostructure preparation methods at present, but they generally have defects such as complicated preparation process, high cost, and poor repeatability.
Moreover, there are many unpredictable SERS behaviors in the prepared SERS substrates, and only a few substrates are designed through known SERS enhancement mechanisms.

Method used

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  • Surface enhanced Raman scattering substrate for detecting pesticides, and production method and application thereof
  • Surface enhanced Raman scattering substrate for detecting pesticides, and production method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Preparation of a surface-enhanced Raman scattering substrate.

[0022] A. Clean the substrate: first clean the substrate with a mixed solution of 98% sulfuric acid and 30% hydrogen peroxide with a volume ratio of 8:2, or deionized water and hydrogen peroxide with a volume ratio of 5:1:1 at 70°C 1. Wash the substrate with ammonium hydroxide solution for 20 minutes. Then rinse with secondary deionized water, blow dry with nitrogen, and fix in a vacuum deposition chamber;

[0023] B. Preparation of titanium and silver film layers: In order to reduce the particles in the cavity, so that the metal target can be smoothly evaporated from the bottom of the cavity to the sample stage on the upper part of the cavity, the pressure is less than 1×10 -6 In Torr’s vacuum deposition chamber, by electron beam evaporation, on the clean substrate in the previous step, a titanium thin film layer with a thickness of 20nm is deposited at a speed of 0.2nm / s, so that the silver t...

Embodiment 2

[0025] Example 2: Substrate detection of the pesticide acetamiprid by surface-enhanced Raman scattering.

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Abstract

The invention discloses a surface enhanced Raman scattering substrate for detecting pesticides, and a production method and an application thereof. The substrate comprises a base sheet, a titanium film covering the surface of the base sheet, a silver film covering the surface of the titanium film, and a silver nanorod array layer covering the surface of the silver film, and an included angle between silver nanorods and the surface of a glass sheet is 86 DEG. The substrate is produced through cleaning the base sheet, producing the titanium film and the silver film, and producing the nanorod array layer. The substrate is applied to pesticide detection, and is especially suitable for onsite rapid detection of the food safety problem.

Description

technical field [0001] The invention relates to a surface-enhanced Raman scattering substrate and a preparation method thereof, as well as the application of the substrate for pesticide detection, and belongs to the technical field of food safety detection. Background technique [0002] Nowadays, the excessive addition and residue of pesticides and food additives seriously threaten people's food safety. Among them: Pesticides and other chemical products with high risk of toxicity have always had residue problems when used in vegetables and fruits. Existing detection methods generally have problems such as complex sample pretreatment process, high detection cost, long detection time, and large relative error. For the widely used pesticides, there are problems such as inability to monitor in real time online and being easily affected by the external environment. [0003] At present, surface-enhanced Raman spectroscopy, as a highly sensitive detection technology, extends the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65C23C14/30C23C14/14C23C14/16
CPCG01N21/658C23C14/14C23C14/16C23C14/30
Inventor 姚悦韩彩芹邹琦王稳孙佳炜雷金燕
Owner XUZHOU NORMAL UNIVERSITY
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