Diffusion of Polymer Segments in Ultrathin Polymer Films Prepared by the Langmuir-Blodgett Technique.

概要

論文の詳細を見る
Ultrathin polymer films of poly(vinyl alkanal acetal) were made by the Langmuir-Blodgett (LB) technique, which enables one to fabricate the layered structure with a thickness of only 1nm per layer. The polymer monolayer on a water surface was successively deposited on a solid substrate as a two-dimensional form, but after the deposition, thermal relaxation of the layered structure occurred under elevated temperatures. The structural change in the nanometer dimension could be sensitively and quantitatively probed by the use of energy transfer between fluorescent chromophores incorporated into each layer. The diffusion constants observed as a function of temperature are in the order of 10-18-10-15cm2 s-1. The thermal properties of the LB films are well characterized by the glass transitions of bulk polymers.
日本学士院の論文