Neutron reflectivity studies of field driven transformations in a monolayer of 4-pentadecyl pyridine at Au electrode surfaces

被引:16
作者
Burgess, I
Zamlynny, V
Szymanski, G
Schwan, AL
Faragher, RJ
Lipkowski, J [1 ]
Majewski, J
Satija, S
机构
[1] Univ Guelph, Dept Chem & Biochem, Guelph, ON N1G 2W1, Canada
[2] Los Alamos Natl Lab, MLNSCE, LANSCE 12, Los Alamos, NM 87545 USA
[3] NIST, Ctr Neutron Res, Gaithersburg, MD 20899 USA
基金
加拿大创新基金会; 加拿大自然科学与工程研究理事会;
关键词
neutron reflectometry; gold electrode; insoluble surfactants; cathodic desorption; 4-pentadecyl-pyridine;
D O I
10.1016/S0022-0728(03)00292-4
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Neutron reflectometry (NR) has been employed to study the structure and composition of thin films formed by 4-pentadecyl-pyridine (C15-4Py) at a gold electrode surface. The thickness and the water content of films of C15-4Py have been measured as a function of the potential applied to the electrode. At positive potentials, where condensed film is formed, the monolayer contains defects that are filled with water. At very negative potentials, the film is desorbed from the electrode surface. NR has demonstrated that, at these potentials, the amphiphilic molecules remain in close proximity to the gold surface as a thicker and water rich film. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:187 / 199
页数:13
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