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dc.contributor.authorYao, JL
dc.contributor.authorMao, BW
dc.contributor.author毛秉伟
dc.contributor.authorGu, RA
dc.contributor.authorTian, ZQ
dc.contributor.author田中群
dc.date.accessioned2012-07-12T01:08:16Z
dc.date.available2012-07-12T01:08:16Z
dc.date.issued1999-06-29
dc.identifier.citationCHEMICAL PHYSICS LETTERS,1999,306(5-6):314-318zh_CN
dc.identifier.issn0009-2614
dc.identifier.urihttp://dx.doi.org/10.1016/S0009-2614(99)00464-9
dc.identifier.urihttps://dspace.xmu.edu.cn/handle/2288/13220
dc.description.abstractTime-dependent surface-enhanced Raman scattering (SERS) form thiourea (TU) and ClO4- coadsorbed at Ag electrodes was investigated using a potential step. The intensity-time profiles for the different vibrational modes can be classified into two categories according to the response rate of the band intensity to the: potential step, i.e. a fast response within 5 s and a slow response up to 5 min. More interestingly, all band intensities show the fast response characteristics after the electrode was made to undertake a negative excursion to the potential of -2.0 V. This phenomenon is explained in terms of co-existence of two types of adsorption sites (SERS active sites), i.e., neutral Ag atom(s) and partial charged Ag atom(s). It is shown that time-dependent SERS combined the potential step method may be helpful not only for gaining a deeper insight into the SERS mechanism(s), but also for revealing the nature and structural dynamics of adsorption sites formed by strong chemical interaction. (C) 1999 Elsevier Science B.V. All rights reserved.zh_CN
dc.language.isoenzh_CN
dc.publisherELSEVIER SCIENCE BVzh_CN
dc.titleTime-dependent Raman spectra from two types of adsorption sites at Ag electrodeszh_CN
dc.typeArticlezh_CN


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