TY - JOUR
T1 - Surface-enhanced Raman scattering analysis of perchlorate using silver nanofilms deposited on copper foils
AU - Hao, Jumin
AU - Xu, Zhonghou
AU - Han, Mei Juan
AU - Xu, Shiyou
AU - Meng, Xiaoguang
PY - 2010/8
Y1 - 2010/8
N2 - Surface-enhanced Raman scattering (SERS) has recently emerged as a tremendous potential method for chemical and biomolecular sensing. SERS analysis of perchlorate using Ag nanofilms deposited on Cu foils (Ag-Cu films) by galvanic displacement reaction was investigated for the first time in this work. The Ag-Cu films were prepared in the solutions containing 2.5-50mM of AgNO3 with the reaction time from 0.5-60min. The relationship between the surface nanostructures of the Ag-Cu films and the SERS sensitivity of perchlorate was examined. The close-packed Ag nanoparticles with an average diameter of 105nm yielded the highest SERS enhancement for perchlorate. Standard calibration curves were prepared with SERS spectra recorded on this optimum Ag-Cu film. At low concentration and in a narrow concentration range, a linear relationship between peak areas and perchlorate concentrations was observed, while a log-log plot yielded a linear relationship over a broad concentration range. The detection limit was determined to be 50μgL-1 for perchlorate.
AB - Surface-enhanced Raman scattering (SERS) has recently emerged as a tremendous potential method for chemical and biomolecular sensing. SERS analysis of perchlorate using Ag nanofilms deposited on Cu foils (Ag-Cu films) by galvanic displacement reaction was investigated for the first time in this work. The Ag-Cu films were prepared in the solutions containing 2.5-50mM of AgNO3 with the reaction time from 0.5-60min. The relationship between the surface nanostructures of the Ag-Cu films and the SERS sensitivity of perchlorate was examined. The close-packed Ag nanoparticles with an average diameter of 105nm yielded the highest SERS enhancement for perchlorate. Standard calibration curves were prepared with SERS spectra recorded on this optimum Ag-Cu film. At low concentration and in a narrow concentration range, a linear relationship between peak areas and perchlorate concentrations was observed, while a log-log plot yielded a linear relationship over a broad concentration range. The detection limit was determined to be 50μgL-1 for perchlorate.
KW - Copper foil
KW - Galvanic displacement reaction
KW - Perchlorate
KW - Silver nanofilm
KW - Surface-enhanced Raman scattering (SERS)
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U2 - 10.1016/j.colsurfa.2010.06.010
DO - 10.1016/j.colsurfa.2010.06.010
M3 - Article
AN - SCOPUS:77954384706
SN - 0927-7757
VL - 366
SP - 163
EP - 169
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
IS - 1-3
ER -