期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 249, 期 2, 页码 301-306出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1006/jcis.2002.8265
关键词
self-assembled multilayers; L-cysteine hydrochloride; coordination and reduction of Cu2+; XPS; cyclic voltammetry
Self-assembled multilayer thin films have been prepared on Au substrate by alternate surface derivatization with L-cysteine hydrochloride and cupric perchlorate. The layer-by-layer structure at each step of multilayer formation was investigated by X-ray photoelectron spectroscopy. The measurements indicate that there are two structure modes in the multilayers. One is that Cu2+ sandwiches between two amino acid groups. The other one is that Cu+ is bonded through disulfide and thiolate. This process is also confirmed by cyclic voltammetry of Cu ion at different self-assembled multilayers. Steps further on will lead to repeated multilayer films. (C) 2002 Elsevier Science (USA).
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