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Surface‐enhanced Raman Scattering of 4‐Aminobenzenethiol Sandwiched between Silver Nanoparticles and Gold Micro‐Powders #
Author(s) -
Choi JeongYong,
Lee Hyang Bong,
Kim Kwan,
Shin Kuan Soo
Publication year - 2015
Publication title -
bulletin of the korean chemical society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.237
H-Index - 59
ISSN - 1229-5949
DOI - 10.1002/bkcs.10161
Subject(s) - raman scattering , micrometer , raman spectroscopy , nanoparticle , materials science , silver nanoparticle , colloidal gold , nanotechnology , chemical engineering , analytical chemistry (journal) , chemistry , optics , organic chemistry , physics , engineering
The surface‐enhanced Raman scattering ( SERS ) activity of micrometer‐sized gold ( μAu ) powders is far weaker than that of micrometer‐sized silver ( μAg ) powders. The Raman peaks of organics assembled on μAu powders can, however, be enhanced dramatically by depositing Ag nanoparticles thereon to form the so‐called sandwich structures. This is demonstrated in this work by using 4‐aminobenzenthiol (4‐ ABT ) as the prototype organic. Besides, the b 2 ‐type bands of 4‐ ABT are found to be enhanced more than the a 1 ‐type band, and this is presumed to be a result of the favorable Ag‐to‐Au charge transfer configuration of the sandwich structure (Ag/4‐ ABT / μAu ), associated with the chemical enhancement mechanism in SERS .