Semiconductor Physics, Quantum Electronics & Optoelectronics. 2010. V. 13, N 4. P. 343-347.
https://doi.org/10.15407/spqeo13.04.343

Morphology and dielectric properties of polymer dispersed liquid crystal with magnetic nanoparticles
P. Kopčanský1, M. Timko1, Z. Mitrova1, V. Zavisova1, M. Koneracká1, N. Tomašovičová1, L. Tomčo1, O.P. Gornitska2, O.V. Kovalchuk2,3, V.M. Bykov3, T.M. Kovalchuk4, I.P. Studenyak5

1Institute of Experimental Physics, Slovak Academy of Sciences, 47, Watsonova str., 04001 Košice, Slovak Republic
2National Aviation University, Institute of Innovative Technologies 1, Cosmonaut Komarov str., 03058 Kyiv, Ukraine
3Institute of Physics, National Academy of Science of Ukraine, 46, prospect Nauky, 03028 Kyiv, Ukraine
4V. Lashkaryov Institute of Semiconductor Physics, NAS of Ukraine, 45, prospect Nauky, 03028 Kyiv, Ukraine
5Uzhgorod National University, 46, Pidhirna str., 88000 Uzhgorod, Ukraine

Abstract. It has been shown that introduction of magnetic nanoparticles (MN) of various shapes with the concentration wt.% into polymer dispersed liquid crystal (PDLC) causes two effects: the size of liquid crystal droplets decreases, and the amount of the latter with through holes increases. MN increase the effective value of permittivity by more than one order within the frequency range , as well as the electron and ion components of conductivity. MN reduce the exponent in the frequency dependence of the electron component of conductivity. The changes caused by the presence of the nanoparticles quantitatively depend on their shape.

Keywords: magnetic nanoparticle, polymer matrix, liquid crystal, permittivity, electron and ion components of conductivity.

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