文献类型：期刊文献

英文题名：Portable Surface-Enhanced Raman Scattering Sensor for Rapid Detection of Aniline and Phenol Derivatives by On-Site Electrostatic Preconcentration

作者：Li, Dan[1,2];Li, Da-Wei[1,2];Fossey, John S.[1,2,3];Long, Yi-Tao[1,2]

机构：[1]E China Univ Sci & Technol, Key Lab Adv Mat, Shanghai 200237, Peoples R China;[2]E China Univ Sci & Technol, Dept Chem, Shanghai 200237, Peoples R China;[3]Univ Birmingham, Sch Chem, Birmingham B15 2TT, W Midlands, England

年份：2010

卷号：82

期号：22

起止页码：9299

外文期刊名：ANALYTICAL CHEMISTRY

收录：;EI(收录号：20104713412199);WOS:【SCI-EXPANDED(收录号:WOS:000284080500026)】；

基金：This research was supported by National High-Tech Research and Development Program 863 of China (Project No. 2008AA06A406), the Ministry of Health (Grant 2009 ZX 10004-301), and the Shanghai Postdoctoral Sustentation Fund, China (Grant 09R21411700). Y.-T.L, is supported by the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning. Y.-T.L. and J.S.F. thank the Catalysis and Sensing for our Environment (CASE) network. J.S.F. thanks ECUST for a visiting professorship, ERDF AWMII, and the University of Birmingham for support.

语种：英文

外文关键词：Surface scattering - Phenols - Aniline - Silver compounds - Substrates - Electrostatics - Raman scattering - Chlorine compounds - Electrodes - Electrodeposition - Raman spectroscopy

摘要：A portable surface-enhanced Raman scattering (SERS) sensor is developed and applied to simultaneous detection of aniline and phenol derivatives in a label-free way with an electrostatic preconcentration technique to amplify the signals. A SERS-active substrate, silver-electro-deposited screen-printed electrodes (Ag-SPEs), is used for qualification and quantification of polar organic pollutants. Observation of SERS spectra at different potentials indicates that polar pollutants are selectively adsorbed on the Ag-SPEs at a given potential, suggesting that Ag-SPEs could selectively attract polar pollutants to an oppositely charged electrode at different potentials. Optimum SERS-active substrate was obtained when a potential of -0.15 V vs Ag/AgCl was applied on the SPEs in 0.1 M AgNO3 solution for 10 min. Moreover, the effects of experimental variables such as the electrodeposition time and potential of Ag and preconcentration time of polar molecules on the SERS signals are presented. Under optimum conditions and with a 785 nm laser, the method is effective over a wide range of concentration (1 nM to 1 mu M) for aniline and phenol derivatives. The novel method described herein presents a new detection regime for environmental pollutant analysis and also demonstrates simultaneous multiplexed detection of polar organic pollutants using convenient Ag-SPEs.