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Titolo:
POTENTIAL-AVERAGED SURFACE-ENHANCED RAMAN-SPECTROSCOPY
Autore:
TIAN ZQ; LI WH; MAO BW; ZOU SZ; GAO JS;
Indirizzi:
XIAMEN UNIV,STATE KEY LAB PHYS CHEM SOLID SURFACES XIAMEN 361005 PEOPLES R CHINA XIAMEN UNIV,DEPT CHEM XIAMEN 361005 PEOPLES R CHINA
Titolo Testata:
Applied spectroscopy
fascicolo: 12, volume: 50, anno: 1996,
pagine: 1569 - 1577
SICI:
0003-7028(1996)50:12<1569:PSR>2.0.ZU;2-Z
Fonte:
ISI
Lingua:
ENG
Soggetto:
X-RAY-DIFFRACTION; SILVER ELECTRODES; IN-SITU; REFLECTANCE SPECTROSCOPY; AG ELECTRODES; INTERFACE; THIOUREA; ADSORPTION; PLATINUM; SPECTRA;
Keywords:
SURFACE-ENHANCED RAMAN SPECTROSCOPY; TIME-RESOLVED MEASUREMENTS; ELECTROCHEMISTRY; POTENTIAL MODULATION; SILVER ELECTRODES; ADSORPTION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
44
Recensione:
Indirizzi per estratti:
Citazione:
Z.Q. Tian et al., "POTENTIAL-AVERAGED SURFACE-ENHANCED RAMAN-SPECTROSCOPY", Applied spectroscopy, 50(12), 1996, pp. 1569-1577

Abstract

This paper describes a novel technique called potential-averaged surface-enhanced Raman spectroscopy (PASERS) which has several advantages over SERS. A PASERS spectrum is acquired when the electrode is rapidlymodulated between two potentials by applying a square-wave voltage. The potential-averaged SERS spectrum contains all the information on the surface species at the two modulated potentials, and each individualSERS spectrum can then be extracted by deconvolution, By properly choosing the two modulating potentials, one can obtain SERS spectra of surface species at electrode potentials where SERS-active sites are normally unstable. PASERS also leads to a unique way of studying complex interfacial kinetic processes by controlling the voltage pulse height, frequency, and shape. Moreover, the measurement of time-resolved spectra in the very Low vibrational frequency region can be achieved by PASERS with the use of a conventional scanning spectrometer with a single-channel detector, In this paper, the main advantages of PASERS are illustrated by studying two typical SERS systems, i.e., thiocyanate ion and thiourea adsorbed at silver electrodes, respectively. It is shown that the potential-averaging method can be applied as a common method to many other existing spectroelectrochemical techniques.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 12/07/20 alle ore 08:47:23