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Częstochowa, Poland

Tkaczyk S.W.,Jdlugosz University Of Czestochowa | Kityk I.V.,Czestochowa Technical University | Kityk I.V.,King Saud University | Rudyk V.,Lviv State University | Kapustianyk V.,Lviv State University
Physica E: Low-Dimensional Systems and Nanostructures

DC-conductivity of the nanocomposites consisting of ferroic nanocrystals NH2(C2H5)4CoCl2Br 2 (TEA-CCB) incorporated into the polymer PMMA matrices is investigated. The investigations are performed for different number of nanocrystallite chromophores and thickness of the samples. The thickness of the nanocomposite films was varied within 0.44-0.48 μm. The measurements were done at different temperatures and different applied voltages. As a dominant mechanism thermoemission was considered, which is determined by temperature of the samples. The gold electrodes were used as principle electrodes. The observed phenomena were explained within a framework of hopping between the trapping levels and possible contribution of self-trapped excitons. © 2010 Elsevier B.V. All rights reserved. Source

Niziol J.,AGH University of Science and Technology | Weglowski R.,Military University of Technology | Klosowicz S.J.,Military University of Technology | Majchrowski A.,Military University of Technology | And 5 more authors.
Journal of Materials Science: Materials in Electronics

We have demonstrated a possibility to design light modulator based on Kerr effect using borate La 2CaB 10O 19 (LCBO) nanocrystallites incorporated into two different polymer-dispersed liquid crystal composites (PDLC). For this reason we have used different amount of the LCBO nanocrystallites to find the optimal conditions for the Kerr modulators. It was established that for the both PDLC systems the borate nanocrystals may be used for effective operation by elecrooptical susceptibilities varying the content of the nanocrystals. At the same time the frequency shift of the Kerr coefficient seems to be sensitive only for the LCBO nanocrystals content about 5% by weight. The maximal value of the Kerr coefficients were varied within the 4 × 10 -9 to 6 × 10 -10 m V -2. © 2010 Springer Science+Business Media, LLC. Source

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