Correlation Between Bulk Orderings and Anchoring Structures of Liquid Crystals Studied by Scanning Tunneling Microscopy

Autor:	Kenji Tochigi, Anthony F. Garito, Akira Yamada, Yasushi Iwakabe, Masahiko Hara, Akio Mukoh, K. Kondo, Hiroyuki Sasabe
Rok vydání:	1991
Předmět:	Stereochemistry Bilayer General Engineering General Physics and Astronomy Anchoring law.invention chemistry.chemical_compound Crystallography Homologous series chemistry law Liquid crystal Phase (matter) Monolayer Scanning tunneling microscope Molybdenum disulfide
Zdroj:	Japanese Journal of Applied Physics. 30:2542
ISSN:	1347-4065 0021-4922
Popis:	The anchoring structures of a homologous series of liquid crystals, n-alkylcyanobiphenyls (mCBs: m=7-12), on molybdenum disulfide (MoS2) are directly observed by scanning tunneling microscopy (STM) in order to analyze the alignment mechanism of liquid crystals. Based on highly reproducible STM images, the anchoring structures of mCBs are clearly divided into two categories, a monolayer (single-row) type (7CB, 8CB, 9CB and 11CB) and a bilayer (double-row) type (10CB and 12CB). Here we propose the monolayer is the anchoring structure of a nematic phase, while the bilayer is the anchoring structure of a smectic phase. The correlation between bulk phase orderings and anchoring structures of liquid crystals is discussed from the viewpoint of surface-phase formation for the mCBs and different solid substrates.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::11b1c484809c28a7cab76e8d1874bd75 https://doi.org/10.1143/jjap.30.2542 Zobrazit plný text záznamu