Abstract
We reported here the results of the fabrication of clay unit layers/organic molecules multilayers films using a conventional Langmuir-Blodgett technique. Smectite were ultrasonically separated by each unit layer into distilled water. Successively, octadecylamine or nonadecylamine was spread from benzene solution on the water subphases contained clay unit layers at various pH. The monolayers were deposited on an appropriate plate such as glass, silicon etc. at pressures of 25-35dyne. The preferred conditions for making the best multilayers films were systematically examined. The reasonable surface areas were obtained from the π-A curves. According to the XRD patterns, the resulting basal spacing of LB films was estimated to be about 61.3A, which corresponded to the bilayeres of alkylamines. IR spectra demonstrated the existence of hydrogen bonding between the alkylamine and silicate layers. On heating above 60°C, the conformation of alkylamines was stepwisely changed. The possible molecular arrangements within the LB film were discussed.
