• 中文
    • English
  • English 
    • 中文
    • English
  • Login
View Item 
  •   DSpace Home
  • 化学化工学院
  • 化学化工-已发表论文
  • View Item
  •   DSpace Home
  • 化学化工学院
  • 化学化工-已发表论文
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Time-dependent Raman spectra from two types of adsorption sites at Ag electrodes

Thumbnail
Full Text
Time-dependent Raman spectra from two types of adsorption sites at Ag electrodes.htm (413bytes)
Date
1999-06-29
Author
Yao, JL
Mao, BW
毛秉伟
Gu, RA
Tian, ZQ
田中群
Collections
  • 化学化工-已发表论文 [14469]
Show full item record
Abstract
Time-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.
Citation
CHEMICAL PHYSICS LETTERS,1999,306(5-6):314-318
URI
http://dx.doi.org/10.1016/S0009-2614(99)00464-9
https://dspace.xmu.edu.cn/handle/2288/13220

copyright © 2002-2016  Duraspace  Theme by @mire  厦门大学图书馆  
About | Policies
 

 

Browse

All of DSpaceCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

My Account

LoginRegister

copyright © 2002-2016  Duraspace  Theme by @mire  厦门大学图书馆  
About | Policies