Self-organization and dynamic characteristics study of nanostructured liquid crystal compounds

Natalie V. Kamanina 1Yulia A. Zubtsova 2Vladimir A. Shulev 2Mariya M. Mikhailova 1Andrey I. Denisyuk 3Igor Y. Denisyuk 1

1. Research Center "Vavilov State Optical Institute", 12 Birzhevaya Line, Saint-Petersburg 199034, Russian Federation
2. State Electrotechnical University, Saint-Petersburg 197376, Russian Federation
3. State Institute of Fine Mechanics and Optics, Saint-Petersburg 197101, Russian Federation

Abstract

Self-organization in dispersed liquid crystal compounds based on the charge-transfer complexes between an organic donor (monomer, polymer, nanoparticles) and a fullerene has been investigated. 10 μm nematic liquid crystal cells with the fullerene complexes based on 2-cyclooctylamine-5-nitropyridine, polyaniline, and phthalocyanine nanoparticles have been studied. It was found that the exposure in a few days resulted in the self-arrangement of the nematic liquid crustal system with the fullerene complex. The microscopic study allowed the transition to be revealed from the nematic phase to the smectic one. For all structures the switch-on time close to 50-100 μs has been obtained. It follows from our results that the mechanism of the accelerated rotation of the LC dipoles is likely to be caused by the order parameter change during the transition from the nematic to the smectic induced the fullerene-containing complex introduction. The complex formation was supported by the data of absorption and luminescence spectra, mass-spectroscopy, non-linear measurements of light-induced effects, and a quantum-chemical simulation. Potentials of these systems for laser optics, medicine, and display application have been examined.

 

Presentation: poster at E-MRS Fall Meeting 2004, Symposium G, by Natalie V. Kamanina
See On-line Journal of E-MRS Fall Meeting 2004

Submitted: 2004-03-28 10:32
Revised:   2009-06-08 12:55