Seeded growth fabrication of Cu-on-Si electrodes for in situ ATR-SEIRAS applications

A seeded-growth approach has been developed to fabricate a Cu nanoparticle film (simplified hereafter with nanofilm) on Si for electrochemical ATR surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS). The approach comprises an initial activation of the reflecting plane of hemicylindrical S...

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Bibliographic Details
Published in:Electrochimica acta 2007-05, Vol.52 (19), p.5950-5957
Main Authors: Wang, Hui-Feng, Yan, Yan-Gang, Huo, Sheng-Juan, Cai, Wen-Bin, Xu, Qun-Jie, Osawa, Masatoshi
Format: Article
Language:English
Subjects:
Adsorption
ATR-SEIRAS
Carbon monoxide
Chemistry
Cu nanofilm electrode
Electrochemistry
Electrodes: preparations and properties
Exact sciences and technology
General and physical chemistry
Other electrodes
Pyridine
Seeded-growth
Study of interfaces
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Summary:A seeded-growth approach has been developed to fabricate a Cu nanoparticle film (simplified hereafter with nanofilm) on Si for electrochemical ATR surface-enhanced infrared absorption spectroscopy (ATR-SEIRAS). The approach comprises an initial activation of the reflecting plane of hemicylindrical Si prism by introducing a Cu seed layer in a CuSO 4-HF solution and the subsequent electroless deposition of the Cu nanofilms from an electroless Cu plating bath. The as-deposited Cu nanofilm exhibited strong SEIRA effect for the CO probe and interfacial free H 2O. ATR-SEIRAS was also applied to characterize the adsorbed geometries of pyridine at the Cu/electrolyte interface. Only vibrational bands assignable to the A 1 symmetry modes were detected in the entire potential window investigated, suggestive of an end-on adsorption via the ring N-atom on a Cu electrode.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2007.03.042