PHOTOINDUCED PHASE TRANSITION SMECTIC A - CHOLESTERIC IN LIQUID CRYSTAL MATRICES CONTAINING PROVITAMIN D

被引：0
|
作者：
Zavora, L. N. [1 ]
Kasyan, N. A. [1 ]
Lisetski, L. N. [1 ]
Panikarskaya, V. D. [1 ]
Terenetskaya, I. P. [2 ]
Orlova, T. N. [2 ]
Torgova, S. I. [3 ]
机构：
[1] NAS Ukraine, Inst Scintillat Mat STC, Inst Single Crystals, Lenin Ave 60, UA-61001 Kharkov, Ukraine
[2] Natl Acad Sci Ukraine, Inst Phys, UA-03039 Kiev, Ukraine
[3] Russian Acad Sci, Inst Phys, Moscow, Russia
来源：
LIQUID CRYSTALS AND THEIR APPLICATION | 2008年 / 03期
关键词：
UV radiation detectors; bioequivalent UV dosimetry; vitamin D; cholesteric liquid crystals; selective reflection; sensor materials;
D O I：
暂无
中图分类号：
O7 [晶体学];
学科分类号：
0702 ; 070205 ; 0703 ; 080501 ;
摘要：
UV-irradiation of liquid crystal mixtures based on cholesterol esters, which contain provitamin D as a non-mesogenic component and form, alongside with the cholesteric phase, smectic A-phase at lower temperatures, can lead to a photoinduced smectic A - cholesteric transition, with a corresponding appearance of visible color upon absorption of a certain dose of UV radiation. The presence of a biological component (provitamin D) makes this system a promising material for bioequivalent UV-dosimetry. Physico-chemical principles governing the process are discussed, which determine the effects of the mixture composition on the sensitivity of the sensor material.
引用
收藏
页码：39 / 44
页数：6
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