Тип публикации: статья из журнала
Год издания: 2009
Идентификатор DOI: 10.1080/15421400903050814
Ключевые слова: electrically commanded surfaces, ion surfactant, nematic, polymer dispersed liquid crystals, surface anchoring, Applied voltages, Crossed polarizers, Director fields, Director reorientation, Droplet structure, High concentration, Homeotropic, Initial state, Ionic modification, Liquid-crystal droplets, Nematic droplets, Nematic polymer, Surface-active cations, Surface-anchoring, Trimethyl, Ammonium compounds, Cationic surfactants, Crystals, Drop formation, Dyes, Ionization of liquids, Ions, Liquid crystal displays, Liquid crystals, Liquids, Nematic liquid crystals
Аннотация: Inverse mode of a novel electrooptical effect caused by the ionic modification of boundary conditions has been studied for liquid crystal droplets. We have considered the droplets of nematic 5CB doped with cationic surfactant cetyl-trimethyl-ammonium-bromide and dispersed in polyvinyl alcohol. In the initial state the surface anchoПоказать полностьюring was normal on the whole interface due to the high concentration of homeotropic surfactant. Applied voltage results in the purification of a section of the interface from the surface-active cations thereby restoring here a tangential anchoring and stimulating the significant transformation of droplet structure. At that three different types of director field distribution can be realized within the same droplet. The proper textures of the droplet both in the crossed polarizers and without analyzer are considered.
Журнал: MOLECULAR CRYSTALS AND LIQUID CRYSTALS
Выпуск журнала: Vol. 512
Номера страниц: 1998-2003
ISSN журнала: 15421406
Место издания: ABINGDON
Издатель: TAYLOR & FRANCIS LTD