Electroconvection of liquid crystals: Tool for fabricating modulated polymer surfaces

Autor:	Heinz-S. Kitzerow, Stephan A. Benning, Andreas Hoischen
Rok vydání:	2009
Předmět:	chemistry.chemical_classification Materials science business.industry General Physics and Astronomy Pattern formation Dielectric Polymer Crystallography Photopolymer Lattice constant chemistry Liquid crystal Dissipative system Optoelectronics Thin film business
Zdroj:	Journal of Applied Physics. 105:013540
ISSN:	1089-7550 0021-8979
DOI:	10.1063/1.3055398
Popis:	Electrically induced dissipative structures in liquid crystals can be stored by the photocuring of reactive mesogens. Thus, spontaneous pattern formation can be used to fabricate phase gratings or polymer films with a periodic surface modulation from an initially uniform sample. Different patterns, both in the conductive and in the dielectric regimes, have been stored. Photopolymerization and subsequent investigation by atomic force microscopy provide a useful tool in analyzing dissipative structures, even if the lattice constants are smaller than 1 μm. This method indicates surface modulations with amplitudes of up to 12 nm and periodicities between 800 nm and several tens of micrometers. The influences of composition and curing conditions on the topography have been studied.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::5b1275f70bbcfc60f5a3371fd7810377 https://doi.org/10.1063/1.3055398 Zobrazit plný text záznamu