Structural transitions in nematic liquid crystals doped with magnetite functionalized single walled carbon nanotubes

被引：5
|
作者：
Mitroova, Zuzana [1 ]
Koneracka, Martina [1 ]
Tomasovicova, Natalia [1 ]
Timko, Milan [1 ]
Jadzyn, Jan [2 ]
Vavra, Ivo [3 ]
Eber, Nandor [4 ]
Fodor-Csorba, Katalin [4 ]
Toth-Katona, Tibor [4 ]
Vajda, Aniko [4 ]
Kopcansky, Peter [1 ]
机构：
[1] Slovak Acad Sci, Inst Expt Phys, Watsonova 47, Kosice 04001, Slovakia
[2] Polish Acad Sci, Inst Mol Phys, PL-60179 Poznan, Poland
[3] Slovak Acad Sci, Inst Elect Engn, Bratislava 84104, Slovakia
[4] Hungarian Acad Sci, Res Inst Solid State Phys & Opt, H-1525 Budapest, Hungary
来源：
12TH INTERNATIONAL CONFERENCE ON MAGNETIC FLUIDS ICMF12 | 2010年 / 9卷
关键词：
Liquid crystal; Fine magnetic particle; Ferronematics; Fredericksz transition; Anchoring;
D O I：
10.1016/j.phpro.2010.11.011
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The 4-(trans-4'n-hexylcyclohexyl)-isothiocyanatobenzene (6CHBT) nematic liquid crystal was doped with single walled carbon nanotubes (SWNTs) and with magnetite labeled single walled carbon nanotubes (SWNTs/Fe3O4). Prepared samples were characterized by infrared spectroscopy, transmission electron microscopy, optical microscopy and by magnetic measurements. Electric and magnetic Freedericksz transitions were measured for the pure liquid crystal, and for the liquid crystal doped with SWNTs, as well as with SWNTs/Fe3O4 ( volume concentration phi = 10(-4)). The density of anchoring energy at the nematic magnetic particle boundary was determined. The value of the anchoring energy density for SWNTs/Fe3O4 is lower than for SWNTs. The critical voltage of the Freedericksz transition depends significantly on the bias magnetic field. (C) 2010 Published by Elsevier Ltd
引用
收藏
页码：41 / 44
页数：4
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