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Details for article 12 of 13 found articles
| Title: |
The packing of azobenzene dye moieties and mesogens in polysiloxane copolymers and its impact on the opto-dielectric effect |
| Author: |
Fischer, B. Thieme, C. Fischer, T. M. Kremer, F. Oge, T. Zentel, R. |
| Appeared in: |
Liquid crystals |
| Paging: | Volume 22 (1997) nr. 1 pages 65-74 |
| Year: |
1997-01-01 |
| Contents: |
Broadband dielectric spectroscopy (102-105Hz) is used to study the opto-dielectric effect in statistical polysiloxane copolymers with side groups containing chiral mesogenic units and others containing azobenzene moieties. Below 64 C, the unexposed copolymer is ferroelectric. UV-exposure induces a photoisomerization of the azobenzene to the cis -configuration, and the phase transition, ferroelectric/non-ferroelectric (SC*/SA), is shifted to lower temperatures. In the temperature interval between the phase transition temperatures ferroelectric/nonferroelectric of the exposed and unexposed samples, an opto-dielectric effect is observed. The efficiency of this opto-dielectric switching depends on the packing of the chromophore within the smectic layers. |
| Publisher: |
Taylor & Francis |
| Source file: |
Elektronische Wetenschappelijke Tijdschriften |
Details for article 12 of 13 found articles
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