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Enhancements in intensity and thermal stability of Raman spectra based on roughened gold substrates modified by underpotential deposition of silver
Author(s) -
Liu YuChuan,
Yang KuangHsuan,
Hsu TingChu
Publication year - 2009
Publication title -
journal of raman spectroscopy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.748
H-Index - 110
eISSN - 1097-4555
pISSN - 0377-0486
DOI - 10.1002/jrs.2196
Subject(s) - underpotential deposition , rhodamine 6g , substrate (aquarium) , raman scattering , chemistry , raman spectroscopy , thermal stability , deposition (geology) , transition metal , electroplating , analytical chemistry (journal) , photochemistry , materials science , electrochemistry , layer (electronics) , catalysis , organic chemistry , optics , electrode , molecule , cyclic voltammetry , paleontology , oceanography , physics , sediment , biology , geology
In this study, electrochemically roughened gold is modified with underpotential deposition (UPD) silver to investigate the effects on enhancements in the intensity and the thermal stability of surface‐enhanced Raman scattering (SERS). The SERS of Rhodamine 6G (R6G) adsorbed on the UPD Ag‐modified Au substrate exhibits a higher intensity by six‐fold of magnitude, as compared with that of R6G adsorbedon the unmodified Au substrate. Moreover, the SERS enhancement capabilities of UPD Ag‐modified Au and unmodified Au substrates are seriously depressed at temperatures higher than 200 and 150 °C, respectively. It indicates that the modification of UPD Ag can significantly depress the thermal destruction of SERS‐active substrates. Copyright © 2009 John Wiley & Sons, Ltd.