Nagaoka Hiroki, Imae Toyoko
Faculty of Science, Nagoya University, Nagoya 464-8602, Japan.
J Colloid Interface Sci. 2003 Aug 15;264(2):335-42. doi: 10.1016/S0021-9797(03)00314-X.
Analytical equations of two-step adsorption kinetics on surface have been derived. Moreover, computer simulations have been carried out to interpret various experimental adsorption kinetics previously reported. In the first case, molecules are further adsorbed from a solution onto a layer consisting of previously adsorbed molecules. This model was applied to the adsorption kinetics of hexadecyltrimethylammonium chloride (C16TAC) on a self-assembled monolayer (SAM) of 3-mercaptopropionic acid (T. Imae, H. Torii, J. Phys. Chem. B 104 (2000) 9218). The second case is that some of the initially adsorbed molecules are released from the adlayer with further time course. The adsorption of C16TAC on 1-dodecanethiol SAM (T. Imae, T. Takeshita, K. Yahagi, Stud. Surf. Sci. Catal. 132 (2001) 477) agrees with this mechanism. The strict mathematical developments presented in this work are demanded to specify the physical meaning of observed non-Langmuir adsorption kinetics, consisting of the two exponential terms.
已推导得出表面两步吸附动力学的解析方程。此外，还进行了计算机模拟以解释先前报道的各种实验吸附动力学。在第一种情况下，分子从溶液中进一步吸附到由先前吸附的分子组成的层上。该模型应用于十六烷基三甲基氯化铵（C16TAC）在3-巯基丙酸自组装单分子层（SAM）上的吸附动力学（T. Imae，H. Torii，《物理化学杂志B》104（2000）9218）。第二种情况是，一些最初吸附的分子会随着时间的推移从吸附层中释放出来。C16TAC在1-十二烷硫醇SAM上的吸附（T. Imae，T. Takeshita，K. Yahagi，《表面科学与催化研究》132（2001）477）符合这种机制。这项工作中给出的严格数学推导对于明确由两个指数项组成的观测到的非朗缪尔吸附动力学的物理意义是必要的。
