Silver nano lattice surface enhanced raman active substrate and preparation method thereof

A surface-enhanced Raman and active substrate technology, applied in Raman scattering, nanotechnology, material excitation analysis, etc., can solve the problems of affecting the spectral stability of adsorbed molecules, expensive equipment, and high preparation costs, and achieve significant surface Raman enhancement Effect, enhanced signal uniformity and stability, easy for industrial production

Inactive Publication Date: 2012-07-18
SHANGHAI UNIV
View PDF0 Cites 19 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are many traditional SERS active substrates commonly used at present, such as: electrochemically roughened noble metal active electrode substrates, noble metal sol active substrates, vacuum-evaporated noble metal island film active substrates, and chemically etched and chemically deposited noble metal active substrates. However, these self-assembled The surface roughness provided by the active substrate is difficult to control and thus affects the stability, uniformity and repeatability of the spectra of adsorbed molecules
In recent years, the methods for prepa

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
  • Silver nano lattice surface enhanced raman active substrate and preparation method thereof
  • Silver nano lattice surface enhanced raman active substrate and preparation method thereof
  • Silver nano lattice surface enhanced raman active substrate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0027] Example 1: In this example, UTAM was used as a template to prepare a large-area ordered and uniform Ag nanoparticle lattice on a Si substrate, and the size was 1×10 -7 Rhodamine 6G (R6G) of M is a probe molecule for surface Raman spectroscopy. First, the 0.2 mm thick 99.999% aluminum sheet was ultrasonically cleaned with acetone for 30 minutes, and then annealed at 450~550℃ under nitrogen protection, and then in a mixture of ethanol and perchloric acid (volume ratio 1:9) at a temperature of 0℃, constant flow Electrochemical polishing under the condition of (750 mA) to prepare spare aluminum sheet. The pretreated spare aluminum sheet was oxidized in 0.3 M oxalic acid at 40 V voltage at 4°C for 12 hours, taken out, and put into a mixed solution of 1.8w% chromic acid and 6w% phosphoric acid with a volume ratio of 1:1. Corrosion at a temperature of 60°C for 10 h; after repeated washing with deionized water, it is placed in an electrolytic cell and subjected to secondary oxid...

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

PropertyMeasurementUnit
Particle sizeaaaaaaaaaa
Center distanceaaaaaaaaaa
Login to view more

Abstract

The invention discloses a silver nano lattice surface enhanced raman active substrate and a preparation method thereof. According to the substrate, silicon single crystal is used as an underlay; a silver nanoparticle array structure is deposited on the silicon surface; the particle size of the silver nanoparticles is 30-90 nm; and the center distance of the particles is 99-111 nm. The silver nano lattice surface enhanced raman active substrate provided by the invention has a uniform shape and a controllable structure, and has an obvious surface raman enhancement effect on analytes of different concentrations, and an enhancement signal is uniform and stable. According to the method, the structural parameters and the shape of a silver nano lattice can be adjusted according to structural parameters of an ultra-thin aluminum oxide template, so that different influences of different metal nano lattice substrates on a raman surface enhancement effect are realized. The substrate and the method have the advantages of easiness for operation, low cost and easiness for industrial production.

Description

technical field [0001] The invention relates to a silver nano-lattice surface-enhanced Raman active substrate and a preparation method thereof, in particular to a silver nano-lattice surface enhancement based on UTAM (Ultra-Thin Alumina Mask, ultra-thin alumina template) surface nano-preparation technology. Raman active substrate and method for its preparation. Background technique [0002] Surface-enhanced Raman Scattering (SERS) has attracted widespread attention since it was discovered in 1974, because of its high sensitivity, it can detect monomolecular layers and sublayers adsorbed on metal surfaces. Molecules in the monolayer, which can give the structural information of surface molecules, are considered to be a very effective tool for probing interface properties and intermolecular interactions, and characterizing surface molecular adsorption behavior and molecular structure. SERS technology has gradually become a powerful research method in the field of surface scie...

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): G01N21/65B82Y40/00
Inventor 付群雷勇窦金霞郑燕胡芸芸王沙沙周懿吴明红李珍
Owner SHANGHAI UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap