Phase Rebuilding of α-Cinnamic Acid in Tail Irradiations

Autor:	Gerd Kaupp, Michael Haak
Rok vydání:	1998
Předmět:	business.industry Atomic force microscopy Cleavage (crystal) Crystal structure Condensed Matter Physics Cinnamic acid chemistry.chemical_compound Wavelength Crystallography Optics chemistry Molecular Transport Near-field scanning optical microscope Irradiation business
Zdroj:	Molecular Crystals and Liquid Crystals Science and Technology. Section A. Molecular Crystals and Liquid Crystals. 313:193-198
ISSN:	1058-725X
DOI:	10.1080/10587259808044274
Popis:	Irradiation of α-cinnamic acid crystals at their absorption tail at 365 and 405 nm and with filtered daylight gives surface features due to long-range molecular movements and phase rebuilding similar to the features in the shorter wavelength irradiations. AFM measurements indicate that the molecular migrations are guided by the crystal structure. Features such as walls, fences and trenches all follow the direction of the cleavage planes at 39° to the c−axis. Volcano-like features also require upward molecular transport. The visibly detectable disintegration of the crystals at low conversions in all cases is studied in some detail. A topotactic reaction is not observed.
Databáze:	OpenAIRE
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