Layer-by-layer characterization of cellulose Langmuir–Blodgett monolayer films

We have investigated the preparation of palmitoyl cellulose Langmuir–Blodgett monolayer films on the indium tin oxide ITO.film layer-by-layer via Fourier Transform-Infrared FT-IR.spectroscopy and Scanning probe microscopy SPM.. The dependence of infrared absorption on mono-layer number has been analyzed. The absorption intensity has been shown to increase exponentially with the layer number in the LB film. P-polarized electric field in the FT-IR reflection absorption spectroscopy RAS.revealed that the C–H stretch mode is stronger than the CsO stretch mode on the palmitoyl unit in the LB film, which is in contrast to a randomly condensed cast film. The mono-layer thickness determined from FT-IR structure analysis is in close agreement with the result obtained by SPM. q1999 Elsevier Science B.V. All rights reserved.