Liquid crystal polymers as directing medium: Creation of organized quantum dots composites

POLY 343

Raisa V. Talroze, rtalroze@cgl.ucsf.edu1, Georgii A Shandryuk, shandgo@mail.ru1, Elena Matukhina, lmatukh@mail.ru2, Alexey S. Merekalov, alexis@ips.ac.ru1, Roman B. Vasiliev3, and Alexander M. Gaskov3. (1) A.V. Topchiev Institute of Petrochemical Synthesis, Russian Academy of Sciences, 29 Leninsky prospect, 119991 Moscow, Russia, (2) Department of Physics, Moscow State Pedagogical University, 29 Malaya Pyrigovskaya, 119882 Moscow, Russia, (3) Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory, 119899 Moscow, Russia
This study was conducted to show how control over nanoparticle shape, liquid crystal (LC) polymer architecture, and the related mesophase structure has made possible the creation of new LC polymer / semiconductor nanoparticle composite materials. Surface modification of semiconductor quantum dot nanoparticles by hydrogen-bonded LC polymers resulted in the formation of uniform and coagulation-free bulk systems. The effect of the LC polymer on the alignment of nanoparticles within the composite was established by varying the polymer structure and the size of the quantum dots. The resultant composites represent a new class of nanomaterials in which quantum dots are aligned within the planes provided by the initial smectic layers separated by the periodically located polymer backbones. The anisotropic structure of the nanocomposites could allow one to fine-tune the response of the material to magnetic, electrical, optical and mechanical stimuli
 

Polymers and Liquid Crystals
8:30 AM-12:00 PM, Tuesday, August 21, 2007 Westin Boston Waterfront -- Otis, Oral

Division of Polymer Chemistry

The 234th ACS National Meeting, Boston, MA, August 19-23, 2007