TEM characterization of cellulose Langmuir-Blodgett films

We have investigated the temperature dependence of the micro-structure of palmitoyl cellulose Langmuir-Blodgett film by high resolution transmission electron microscope (TEM). The existence of the well-defined solid-like state at temperatures lower than 303 K, and the deformed solid-like state at temperatures higher than 303 K have been examined by (d pi/dA) value. The average grain size of about 200 nm has been observed at lower subphase temperatures and the size decreased with the increase of temperature up to the transition temperature of 303 K, and the size of deformed solid-film state increased with further increase of subphase temperature. (C) 1999 Elsevier Science B.V. All rights reserved.