Indexed by:Journal Papers
Date of Publication:2019-10-01
Journal:APPLIED SURFACE SCIENCE
Included Journals:SCIE、EI
Volume:490
Page Number:293-301
ISSN No.:0169-4332
Key Words:Hollow; Porous silver-polymer microspheres; Hierarchical structure; SEAS
Abstract:The Surface-enhanced Raman scattering (SERS) effect on the surface of metal conductors can significantly improve the sensitivity of molecular detection. Therefore, it is widely used in the field of chemical sensors. The nanostructure of the metal surface strongly influences the strength of the SEAS by adsorption and surface electric field. Herein, we combine microfluidic technology with electroless silver plating to produce hollow microspheres with different wall thicknesses. The microspheres have a diameter of 400 mu m and a spherical shell thickness of 40-100 mu m. The spherical shell has a porous structure formed by phase separation, on which nanosilver particles can be deposited. The silver-polymer hybrid microspheres can adsorb dyes in aqueous solution and produce significant SEAS effects, and the Raman signal enhancement factors can be up to 7.11 x 10(11). Computational simulations and experimental results show that the Raman enhancement effect is related to the distance between the silver particles on the surface and the hollow structure of the microspheres.
Professor
Supervisor of Doctorate Candidates
Supervisor of Master's Candidates
Main positions:Vice dean of School of Chemistry
Gender:Male
Alma Mater:Tsinghua University
Degree:Doctoral Degree
School/Department:School of Chemistry
Discipline:Inorganic Chemistry. Physical Chemistry (including Chemical Physics). Chemical Engineering
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