Influence of nanoparticles of Cu₇GeS₅I superionic conductor on dielectric properties of planar-oriented nematic liquid crystal 6CB

• Published in: Semiconductor Physics Quantum Electronics & Optoelectronics
• Date: 2018
• Main Authors: Kovalchuk, O.V., Luchynets, M.M., Studenyak, I.P., Timko, M., Kopcansky, P.В., Kovalchuk, T.M.
• Format: Article
• Language: English
• Published: Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України 2018
• Subjects: Hetero- and low-dimensional structures
• Online Access: https://nasplib.isofts.kiev.ua/handle/123456789/215318
• Journal Title: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Cite this: Influence of nanoparticles of Cu₇GeS₅I superionic conductor on dielectric properties of planar-oriented nematic liquid crystal 6CB / O.V. Kovalchuk, M.M. Luchynets, I.P. Studenyak, M. Timko, P.В. Kopcansky, T.M. Kovalchuk // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2018. — Т. 21, № 4. — С. 407-411. — Бібліогр.: 9 назв. — англ.

The influence of Cu₇GeS₅I nanoparticles on the dielectric properties of planar-oriented liquid crystal 6CB has been investigated within the frequency range 6…10⁶ Hz at the temperature 293 K. The concentration of nanoparticles varied within the range 0 to 0.1 wt.%. It has been shown that the Cu₇GeS₅I nanoparticles considerably less increase the conductivity of the liquid crystal (only by 1.3 times at their maximum concentration) than Cu₇PS₆ ones, the influence of which on the conductivity of the same liquid crystal we investigated earlier (24-fold increase in the conductivity at the same concentration of nanoparticles). It has been assumed that the main mechanism of conductivity changes when introducing Cu₇GeS₅I nanoparticles is the transfer of charge through nanoparticles. This mechanism of charge transfer is characterized by a rather strong dependence of the conductivity of the liquid crystal on the frequency and is experimentally observed, especially at the maximum concentration of nanoparticles.