Surface-imaging of frozen blue phases in a discotic liquid crystal with atomic force microscopy

Autor:	Mario Thieme, Daniel Krüerke, Alfred Saupe, Gerd Heppke, Anton Hauser
Rok vydání:	1997
Předmět:	Condensed Matter::Soft Condensed Matter Surface (mathematics) Crystallography Reflection (mathematics) Dopant Chemistry Liquid crystal Discotic liquid crystal Materials Chemistry General Chemistry Texture (crystalline) Supercooling Spectral line
Zdroj:	Journal of Materials Chemistry. 7:2223-2229
ISSN:	1364-5501 0959-9428
DOI:	10.1039/a703272b
Popis:	Discotic cholesteric phases with extremely small pitches were obtained with cellobiose derivatives as chiral dopants. These binary mixtures tend to form up to three distinct blue phases. An interesting property of these mixtures is that the blue phases can be supercooled to a glass-like state. Microscopic studies, reflection spectra, and Kossel diagrams all indicate that the three discotic blue phases BPDI, BPDII and BPDIII are analogous to the well-known calamitic modifications. In addition to the optical studies, we investigated the free surfaces of the frozen blue phases using atomic force microscopy.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f9d47bc437a9f34a71049cc647a7bd90 https://doi.org/10.1039/a703272b Zobrazit plný text záznamu