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Structural Forces near Phase Transitions of Liquid Crystals
Author(s) -
Kočevar Klemen,
Muševič Igor
Publication year - 2003
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.200300787
Subject(s) - liquid crystal , materials science , phase (matter) , chemical physics , phase transition , adsorption , nanoscopic scale , pulmonary surfactant , condensed matter physics , crystal (programming language) , atomic force microscopy , surface force , crystallography , nanotechnology , chemistry , thermodynamics , physics , classical mechanics , organic chemistry , optoelectronics , computer science , programming language
The structure of the fragile liquid‐crystalline phases has a strong impact on the forces between bodies immersed in a liquid crystal (LC). We have equipped an atomic force microscope with a precise temperature control and measured various liquid‐crystalline structural forces at temperatures close to the phase transitions. The observed forces agree well with predictions of Landau–de Gennes phenomenological theory of LCs, even at a nanoscale length. In addition to this, we have observed a molecular layer, adsorbed on the surfactant‐covered glass surface, and determined its thickness and elastic properties.
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