Reversible adsorption change of 2-amino-4,5-imidazoledicarbonitrile on Ag electrode surfaces by potential-dependent surface-enhanced Raman scattering
- Authors
- Jang, Yun Hee; Hwang, Sungu; Cho, Keunchang; Lim, Manho; Joo, Taiha; Choi, Suhee; Kim, Jongwon; Joo, Sang-Woo
- Issue Date
- Mar-2011
- Publisher
- WILEY-BLACKWELL
- Keywords
- adsorption; 2-Amino-4,5-imidazoledicarbonitrile; Ag; potential-dependent SERS; DFT calculation
- Citation
- SURFACE AND INTERFACE ANALYSIS, v.43, no.3, pp.757 - 762
- Journal Title
- SURFACE AND INTERFACE ANALYSIS
- Volume
- 43
- Number
- 3
- Start Page
- 757
- End Page
- 762
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/13708
- DOI
- 10.1002/sia.3626
- ISSN
- 0142-2421
- Abstract
- The potential-induced adsorption change of 2-amino-4,5-imidazoledicarbonitrile (AIDCN) on Ag electrode surfaces has been examined by surface-enhanced Raman scattering (SERS) in an applied potential range between -1.0 and 0.2 V. Upon adsorption, AIDCN has a substantial interaction with the Ag metal surfaces via its two nitrile groups. The CN stretching peaks at similar to 2200 cm(-1) appeared to be more intensified and redshifted at a negative potential. The deconvolution peak analysis of the CN bands at various voltages suggests that there should be a change in binding modes of AIDCN on Ag surfaces. This potential-dependent orientation change appeared to be reversible. The density functional theory (DFT) calculation of AIDCN on Ag cluster atoms is used to explain its potential-dependent adsorption. Copyright (c) 2010 John Wiley & Sons, Ltd.
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