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Adsorbate‐Induced Changes in Surface Potential of Gold Nanoparticles Revealed by Raman Spectroscopy
Author(s) -
Shin Dongha,
Kim Kwan,
Shin Kuan S.
Publication year - 2010
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200900780
Subject(s) - raman spectroscopy , colloidal gold , surface enhanced raman spectroscopy , nanoparticle , acetone , spectroscopy , chemistry , polar , electrode , analytical chemistry (journal) , materials science , nanotechnology , photochemistry , chemical physics , raman scattering , organic chemistry , optics , physics , quantum mechanics , astronomy
Sensitive “hot spot”: Upon exposure to polar organic vapors like acetone and ammonia, a large peak shift is observed for the NC stretching band of 1,4‐PDI that is situated in the gap between a gold electrode and gold nanoparticles (see figure). The peak shift is due to the large surface‐to‐volume ratio of Au nanoparticles.