화학공학소재연구정보센터
Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals, Vol.267, 129-138, 1995
Anchoring Phase-Transition and Bulk Phase Sequence of Liquid-Crystals Studied by Scanning-Tunneling-Microscopy
On the basis of the highly reproducible scanning tunneling microscopy (STM) images, the anchoring structures of a homologous series of liquid crystals, n-alkylcyanobiphenyls (mCBs) are clearly divided into two categories; a single-row type and a double-row type. We have proposed that the single-row is the anchoring structure of a nematic phase, while the double-row is the one of a smectic phase. Furthermore, a new phase transition only available at the boundary has been confirmed for the first time in the binary mixtures. The correlation between those anchoring structures and the bulk phase diagrams is discussed from the viewpoint of anchoring phase formation at a molecular level.