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Method for preparing broken-line type inclined silver nanorod array surface enhanced Raman substrate

A surface-enhanced Raman and silver nanotechnology, applied in Raman scattering, material excitation analysis, etc., can solve problems such as difficulties in application and promotion, and achieve the effects of high sensitivity, simple method, and low cost

Inactive Publication Date: 2013-01-16
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the chromatographic method requires a complicated sample pretreatment process, requires sophisticated instruments, a good experimental environment and well-trained operators, and prepares standard substances for qualitative and quantitative use, which all give the method App Promotion Brings Difficulties

Method used

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  • Method for preparing broken-line type inclined silver nanorod array surface enhanced Raman substrate
  • Method for preparing broken-line type inclined silver nanorod array surface enhanced Raman substrate
  • Method for preparing broken-line type inclined silver nanorod array surface enhanced Raman substrate

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Embodiment 1

[0028] (1) The silicon substrate 1 is ultrasonically cleaned with acetone, alcohol, and deionized water one by one and dried;

[0029] (2) Fixing the silicon substrate 1 pretreated in step (1) on the sample stage 7 of the electron beam evaporation coating machine;

[0030] (3) Using metallic silver as the target material, pump the chamber of the electron beam evaporation coating machine to 3×10 -5 Pa high vacuum;

[0031] (4) Use liquid nitrogen to reduce the temperature of the sample stage to 200~260K;

[0032] (5) Adjust the incident angle of the electron beam 6 from 3 to 80 degrees, and make the sample stage 7 static, and grow oblique silver nanorods on the silicon substrate 1 placed on the sample stage 7; rotate the sample stage 180 degrees, and continue plating Silver nanorods of the same length;

[0033] (6) Repeat step (5), and finally plate on the substrate to form a zigzag silver nanorod array with a total length of 300-2000 nm and an inflection point of N; the zig...

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Abstract

The invention discloses a method for preparing a broken-line type inclined silver nanorod array surface enhanced Raman substrate, which belongs to the technical field of a surface enhanced Raman effect. In the invention, an electron beam evaporation film plating machine is utilized, silver is adopted as a target, the broken-line type inclined silver nanorod array with the number of inflection points of 1 to 7 obliquely grows on a silicon-based substrate or a glass-based substrate under the temperature of 200 to 260K, and the broken-line type inclined silver nanorod array surface enhanced Raman substrate is obtained; and then a rhodamine 6G as a detection molecule is utilized for calibrating the surface enhanced Roman capacity of the obtained broken-line type inclined silver nanorod array surface enhanced Raman substrate. The enhanced Roman capacity of the obtained broken-line type inclined silver nanorod array surface enhanced Raman substrate obtained by the invention is obviously stronger than that of a straight-line type inclined silver nanorod array surface enhanced Raman substrate, and is especially stronger when the number of inflection points is 3, 4 or 5; and the method provided by the invention is simple and fast, and is low in cost and high in sensitivity.

Description

technical field [0001] The invention belongs to the technical field of surface-enhanced Raman effects, and in particular relates to a method for preparing a surface-enhanced Raman substrate of a zigzag silver nano-rod array. Background technique [0002] At present, the internationally recognized method for detecting POPs is mainly high-resolution gas chromatography-mass spectrometry, which has unique specificity and high sensitivity for the analysis of trace and ultra-trace organic pollutants . However, the chromatographic method requires a complicated sample pretreatment process, requires sophisticated instruments, a good experimental environment and well-trained operators, and prepares standard substances for qualitative and quantitative use, which all give the method App promotion poses difficulties. [0003] The surface-enhanced Raman effect is used in the trace detection of chemical and biological molecules, and has the advantages of high sensitivity, short detection...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/65C03C17/09C04B41/51
Inventor 张政军周钦张弦
Owner TSINGHUA UNIV
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