National Institute of Advanced Industrial Science and Technology, 1-1-1 Umezono, Tsukuba, Ibaraki 305-8568, Japan.
Langmuir. 2010 Feb 16;26(4):2514-20. doi: 10.1021/la902788b.
The adsorption of (Ca(2)Nb(3)O(10))(-) (CNO) polyanionic nanosheets from their dilute colloidal suspensions onto gas-liquid interfaces with and without a cationic N(CH(3))(2)(C(18)H(37))(2) (DOA) surfactant film has been experimentally investigated. Our concern has been focused particularly on their dynamical aspects, which can be observed owing to the long specific time of the adsorption. The theoretical framework of the Langmuir adsorption model has enabled a quantitative analysis of the observed data, and that analysis has indicated that the presence of a positively charged Langmuir film enhances the ratio of the adsorption and desorption rate constants by approximately 30 times. Furthermore, the experimental results have shown that a "balanced" hybrid Langmuir film, in which both organic and inorganic constituents are densely packed, can be prepared.
(Ca(2)Nb(3)O(10))(-)（CNO）多阴离子纳米片从其稀胶体悬浮液中吸附到带有和不带有阳离子N(CH(3))(2)(C(18)H(37))(2)（DOA）表面活性剂膜的气液界面上的吸附已被实验研究。我们特别关注它们的动力学方面，由于吸附的特定时间长，可以观察到这些方面。Langmuir 吸附模型的理论框架使得对观察到的数据进行定量分析成为可能，并且该分析表明，存在带正电荷的 Langmuir 膜可以将吸附和脱附速率常数的比值提高约 30 倍。此外，实验结果表明，可以制备“平衡”混合 Langmuir 膜，其中有机和无机成分都被密集地包装。
