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Sensitivity of 6CHBT Liquid Crystal Doped with Ferroelectric or Magnetic Particles to Electric and Magnetic Fields

100%

Majorošová J., Tomašovičová N., Timko M., Koneracká M., Studenyak I., Kovalchuk O., Kovalchuk S., Jadżyn J., Kopčanský P.

vol. 126

issue 1

260-261

Introduction of ferroelectric or magnetic nanoparticles into nematic liquid crystal is a promising method for the improvement of the electro-optic or magneto-optic properties of different nematic liquid crystals by non-chemical way. This work is devoted to the study of composite systems of liquid crystal with spherical ferroelectric or magnetic particles with the aim to study their sensitivity to electric and magnetic fields. The nematic 4-(trans-4'-n-hexylcyclohexyl)-isothiocyanatobenzene (6CHBT) liquid crystal was doped with SbSI ferroelectric particles or with Fe_{3}O_{4} magnetic particles. The structural transitions in ferronematic samples were indicated by capacitance measurements in a capacitor made of ITO-coated glass electrodes in combined electric and magnetic fields. The obtained results showed the increase of the shift in critical voltage with increasing magnetic field in both kinds of samples.

Dielectric Properties of Lyotropic Magnetic Liquid Crystal

81%

Kopčanský P., Tomčo L., Jadzyn J., Swiergiel J., Majorošová J., Kubovčíková M., Timko M., Rajňák M., Šipošová K., Gažová Z., Bednariková Z., Hu C.-K., Hayryan S., Studenyak I., Kovalchuk T., Kovalchuk O.

Acta Physica Polonica A

2015

vol. 127

issue 2

632-634

An important feature of lyotropic liquid crystals is the self-assembly of the amphiphilic molecules as supermolecular structures. We have studied the formation of nematic liquid crystal phase in solutions containing lysozyme amyloid fibrils and magnetic nanoparticles using oscilloscopic method. Interaction of fibrils with magnetic nanoparticles under the external magnetic field resulted in fibril re-arrangement. The analysis of the obtained results suggests that the decrease in conductivity of solutions in presence of magnetic field is due to decrease of the ion mobility caused by re-arrangement of structures in the solution. The obtained results allow determination of the optimum ratio of the components which can lead to preparation of solutions with a more ordered structure in presence of magnetic field.

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2 Acta Physica Polonica A

1 2015

1 2014

2 Kopčanský P.

2 Kovalchuk O.

2 Majorošová J.

2 Studenyak I.

2 Timko M.

1 Bednariková Z.

1 Gažová Z.

1 Hayryan S.

1 Hu C.-K.

1 Jadzyn J.

1 Jadżyn J.

1 Koneracká M.

1 Kovalchuk S.

1 Kovalchuk T.

1 Kubovčíková M.

1 Rajňák M.

1 Swiergiel J.

1 Tomašovičová N.

1 Tomčo L.

1 Šipošová K.

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Sensitivity of 6CHBT Liquid Crystal Doped with Ferroelectric or Magnetic Particles to Electric and Magnetic Fields

Dielectric Properties of Lyotropic Magnetic Liquid Crystal