Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Preparation method of surface-enhanced Raman scattering (SERS) substrate polarized by metal nano particle array

A technology of metal nanoparticles and surface-enhanced Raman, which is applied in the field of optical technology and biosensing, can solve the problems of poor controllability, uneven distribution of surface particles, and uncontrollable structure, and achieve consistent orientation, small particle gaps, and improved The effect of sensitivity

Inactive Publication Date: 2015-12-09
UNIV OF ELECTRONIC SCI & TECH OF CHINA
View PDF4 Cites 14 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has many constraints, such as reagent concentration, reaction temperature, deposition time, etc., which have a relatively large impact on the surface morphology of the deposited film, so its controllability is poor.
(1) Reagent concentration, reaction temperature, deposition time, etc. all have a relatively large impact on the surface morphology of the deposited film, so its controllability is poor
(2) The surface particle distribution is uneven and the structure is uncontrollable
This method has the advantages of rapid and large-area preparation of SERS active substrates of nanoparticle arrays, but the arrangement of nanoparticles in the micro-square array units in this preparation method is still randomly distributed, so the SERS enhancement factor is still not very high.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of surface-enhanced Raman scattering (SERS) substrate polarized by metal nano particle array
  • Preparation method of surface-enhanced Raman scattering (SERS) substrate polarized by metal nano particle array
  • Preparation method of surface-enhanced Raman scattering (SERS) substrate polarized by metal nano particle array

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0038] Present embodiment adopts following technical scheme:

[0039] A method for preparing a metal nanoparticle array polarized surface-enhanced Raman scattering substrate, the process of which is as follows figure 1 shown, including the following steps:

[0040] Step 1. Preparation of silver nanoparticle colloidal solution;

[0041] Prepare spherical or ellipsoidal silver nanoparticle colloid solution with a diameter of 20±5nm by photochemical reduction method;

[0042] Step 2. Focusing of the laser evanescent standing wave;

[0043] Let the intensity of the two beams satisfying the interference condition be I 1 , I 2 (I 1 ≈I 2 ) TE polarized lasers are respectively incident on opposite sides of an inverted glass regular prism, and the incident angles of the two beams of light are equal. total reflection, at the same time, the incident angles of the two laser beams on the inner side of the upper surface are equal, forming an evanescent standing wave, at this time, th...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a preparation method of a surface-enhanced Raman scattering (SERS) substrate polarized by a metal nano particle array and belongs to the fields of optical technology and bio-sensors. The invention aims to disclose a metal nano particle array SERS active substrate being large in area, high in efficiency, low in cost, good in uniformity and high in sensitivity. On the basis of the principles of cooperation of nano structural polarization configuration and molecular configuration, through a laser evanescent stationary wave focus deposition technology, the polarized fixed noble nano particle array SERS active substrate is prepared. The preparation method achieves ultra-strong SERS enhancement and is beneficial to further development of a polarized light SERS mono-molecular detection technology.

Description

technical field [0001] The invention belongs to the field of optical technology and biosensing, and in particular relates to a method for preparing a metal nanoparticle array polarized surface-enhanced Raman scattering substrate. Background technique [0002] Surface-Enhanced Raman Scattering (Surface-Enhanced Raman Scattering, SERS) technology is a very important technology in modern detection. SERS technology is widely used in many fields such as chemical industry analysis, biological analysis and medical detection because of its high sensitivity, low fluorescence background, and non-destructive to detection samples. At present, the preparation process of commonly used SERS substrates is mostly complicated and inconvenient to use, which hinders the wide application of this technology. SERS has special requirements on the morphology and dielectric constant of the substrate surface, and the surface-enhanced Raman scattering effect can only be observed under certain experime...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G01N21/65
Inventor 黄小平齐明熙王翔王鹏李玉侯宇蒙赵青
Owner UNIV OF ELECTRONIC SCI & TECH OF CHINA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com