Photoinduced changes of surface topography in amorphous, liquid-crystalline, and crystalline films of bent-core azobenzene-containing substance

0462972 - FZÚ 2017 RIV US eng J - Článek v odborném periodiku
Bobrovsky, A. - Mochalov, K. - Oleinikov, V. - Solovyeva, D. - Shibaev, V. - Bogdanova, Y. - Hamplová, Věra - Kašpar, Miroslav - Bubnov, Alexej
Photoinduced changes of surface topography in amorphous, liquid-crystalline, and crystalline films of bent-core azobenzene-containing substance.
Journal of Physical Chemistry B. Roč. 120, č. 22 (2016), 5073-5082. ISSN 1520-6106. E-ISSN 1520-5207
Grant CEP: GA ČR GA16-12150S; GA MŠMT(CZ) LH15305
Institucionální podpora: RVO:68378271
Klíčová slova: liquid crystals * azo group * bent-shaped material * nematic * photo-optical behaviour
Kód oboru RIV: JJ - Ostatní materiály
Impakt faktor: 3.177, rok: 2016

Recently, photofluidization and mass-transfer effects have gained substantial interest because of their unique abilities of photocontrolled manipulation with material structure and physicochemical properties. In this work, the surface topographies of amorphous, nematic, and crystalline films of an azobenzene-containing bent-core compound were studied using a special experimental setup combining polarizing optical microscopy and atomic force microscopy. The effects of UV and visible-light irradiation on the surface roughness of the films were investigated. Focused polarized visible-light irradiation (457.9 nm) results in mass-transfer phenomena and induces the formation of so-called "craters" in amorphous and crystalline films of the substance. The observed photofluidization and mass-transfer processes allow glass-forming bent-core azobenzene-containing substances to be considered for the creation of promising materials with photocontrollable surface topographies.

Trvalý link: http://hdl.handle.net/11104/0262464