Confocal Raman and AFM Imaging of Paper

摘要

The properties of paper are determined primarily by the cellulose fibre composition. Most papers are then further processed by various chemical treatments including bleaching and lamination. A detailed understanding of the micro- and nanostructures of the paper in its successive stages of production as well as the final paper composition at a sub-micrometre level are essential for further improvement of its properties. With the advancement of nano-analytical instrumentation this detailed knowledge has become readily accessible. Confocal Raman imaging is a valuable tool for such studies, as it not only reveals optical information but also information regarding the 3D distribution of the chemical compounds in the sub-micrometre range [1-3]. In the paper surface finishing process additional surface roughness parameters can be measured by combining the confocal Raman microscope with an atomic force microscope (AFM). Such combined analytical microscopes allow a direct linking between high resolution imaging and chemical identification of various chemical compounds on a surface.