Surface-common-enhanced fluorescence surface-enhanced Raman multi-layer core-shell structure composite particles and preparation method of particles

A surface-enhanced Raman, multi-layer core-shell structure technology, applied in nano-optics, nano-technology, nano-technology, etc., can solve the problem of large substrate size, and achieve the advantages of increased Raman intensity, convenient method and good aqueous solution dispersibility. Effect
CN103286312AInactive Publication Date: 2013-09-11FUDAN UNIV
9 Cites 29 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
FUDAN UNIV
Publication Date
2013-09-11
Estimated Expiration
Not applicable · inactive patent

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention belongs to the field of nano material preparation and provides a method to achieve surface-common-enhanced fluorescence and surface-enhanced Raman in a core-shell structure. Spherical silver nano particles are used as substrates of surface-common-enhanced fluorescence and surface-enhanced Raman, the silver nano particles are placed inside the shell layers, with good surface-enhanced Raman activity, of gold nano particles, fluorescent dye molecules are disposed between the silver nano particles and the gold nano particles, and the distances among the silver nano particles, the fluorescent dye molecules and the gold nano particles to achieve surface-common-enhanced fluorescence and surface-enhanced Raman in the core-shell structure. A Stober method is used to change corresponding experiment parameters, silicon dioxide of different thicknesses is wrapped on the surfaces of the silver nano particles to adjusting the distances among the silver nano particles, the fluorescent dye molecules and the gold nano particles, surface-common-enhanced fluorescence and surface-enhanced Raman signals of the manufactured multi-layer core-shell structure composite particles are further enhanced, and the multi-layer core-shell structure composite particles are good in water solubility, uniform and stable in nature, and promising in potential application prospect in fields such as biological imaging, safety detection and catalyzing. The method is wide in raw material source, simple and easy to operate, easy in batch and large-scale production, good in industrial production foundation, and promising in application prospect.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of nanomaterial preparation. The surface of silver nanoparticles is coated with silicon dioxide of different thicknesses by the Stober method to adjust the distance between fluorescent dyes and gold nanoparticles with surface-enhanced Raman activity, and obtain a Composite particles with a multilayer core-shell structure that enhance fluorescence and surface-enhanced Raman. Background technique

[0002] In recent years, plasmonic nanostructures have been widely used in solar cells, photocatalysis, spectrum-based immunoassays, and data storage. When local surface plasmons resonate with incident light, the electric field of plasmonic nanostructures is greatly enhanced, and at the same time increases The interaction between molecules and light on the surface of the nanostructure is realized, resulting in surface-enhanced fluorescence and surface-enhanced Raman. Surface-enhanced fluorescence can enhance light s...

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