The structural transitions in a nematic liquid crystals doped with magneticaly labeled carbon nanotubes

Z. Mitróová¹ - N. Tomašoviċová¹ - M. Koneracká¹ - V. Závišová¹ - M. Timko¹ - J. Kováċ¹ - P. Kopċanský¹ - L. Tomċo² - N. Éber³ - K. Fodor-Csorba³ - T. Tóth-Katona³ - A. Vajda³ - J. Jadzyn⁴ - E. Beaugnon⁵ - X. Chaud⁵

¹ Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Košice, Slovakia
² Faculty of Aeronautics, Technical University, Rampova 7, 041 21 Košice, Slovakia
³ Research Institute for Solid State Physics and Optics, Hungarian Academy of Sciences, H-1525 Budapest, Hungary
⁴ Institute of Molecular Physics, Polish Academy of Sciences, Smoluchovskiego 17, 60179 Poznan, Poland
⁵ Grenoble High Magnetic Field Laboratory, Centre National de la Recherche Scientifique, 25 Avenue des Martyrs, Grenoble, France

Abstract
The 4-(trans-4'-n-hexylcyclohexyl)-isothiocyanatobenzene (6CHBT) liquid crystal was doped with carbon nanotubes and magnetically labeled carbon nanotubes. The prepared samples were characterized by infrared (IR) spectroscopy, transmition electron microscopy (TEM), optical microscopy and by magnetic measurements. The electric and magnetic Freedericksz transition were measured for pure liquid crystal for liquid crystal doped with multi-walled carbon nanotubes (MWNTs) and with magnetically labeled MWNTs (volume concentration φ = 2×10⁻³). Figs 10, Refs 6.