title: Self-assembly of L-cysteine-copper(II)/copper(I) multilayer thin films on gold.
abstract: 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 Cu(2+) 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.
authors.affiliation: Coordination Chemistry Institute, State Key Laboratory of Coordination Chemistry, Nanjing University, No. 22 Hankou Road, Nanjing 210093, People's Republic of China.
authors.forename: Wen-Wei
authors.initials: WW
authors.lastname: Zhang
authors.forename: Chang-Sheng
authors.initials: CS
authors.lastname: Lu
authors.forename: Yang
authors.initials: Y
authors.lastname: Zou
authors.forename: Jing-Li
authors.initials: JL
authors.lastname: Xie
authors.forename: Xiao-Ming
authors.initials: XM
authors.lastname: Ren
authors.forename: Hui-Zhen
authors.initials: HZ
authors.lastname: Zhu
authors.forename: Qing-Jin
authors.initials: QJ
authors.lastname: Meng