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

页码：39 / 44

页数：6

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