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Journal of Nanomaterials
Volume 2016 (2016), Article ID 8989250, 9 pages
http://dx.doi.org/10.1155/2016/8989250
Research Article

Functional Smart Dispersed Liquid Crystals for Nano- and Biophotonic Applications: Nanoparticles-Assisted Optical Bioimaging

1Lab for Photophysics of Media with Nanoobjects, Vavilov State Optical Institute, Kadetskaya Liniya VO, Dom 5, Korpus 2, St. Petersburg 199053, Russia
2St. Petersburg Electrotechnical University (“LETI”), Professora Popova Street, Dom 5, St. Petersburg 197376, Russia
3St. Petersburg University of Fine Mechanics and Optics, Sablinskaya Street 14, St. Petersburg 197101, Russia
4Pavlov First St. Petersburg State Medical University, Lev Tolstoy Street 6/8, St. Petersburg 197022, Russia
5IQSC-USP, Avenida Trabalhador São Carlense 400, 13566-590 São Carlos, SP, Brazil

Received 5 February 2016; Revised 15 April 2016; Accepted 20 April 2016

Academic Editor: Dan Wang

Copyright © 2016 N. V. Kamanina et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Functional nematic liquid crystal structures doped with nano- and bioobjects have been investigated. The self-assembling features and the photorefractive parameters of the structured liquid crystals have been comparatively studied via microscopy and laser techniques. Fullerene, quantum dots, carbon nanotubes, DNA, and erythrocytes have been considered as the effective nano- and biosensitizers of the LC mesophase. The holographic recording technique based on four-wave mixing of the laser beams has been used to investigate the laser-induced change of the refractive index in the nano- and bioobjects-doped liquid crystal cells. The special accent has been given to novel nanostructured relief with vertically aligned carbon nanotubes at the interface: solid substrate-liquid crystal mesophase. It has been shown that this nanostructured relief influences the orienting ability of the liquid crystal molecules with good advantage. As a result, it provokes the orientation of the DNA. The modified functional liquid crystal materials have been proposed as the perspective systems for both the photonics and biology as well as the medical applications.