Anisotropic organic media as model bioequivalent systems. I. Liquid crystals containing dispersed multiwall nanotubes under aspects of anisotropic intermolecular interactions
Abstract
Dispersions of carbon nanotubes (NT) in liquid crystals have been considered as a model system for studies of anisotropic intermolecular interactions in condensed organic media. Electric conductivity data were obtained for nematic liquid crystals (LC) with small (0.01-0.15 wt %) concentrations of multiwall NT dispersed therein. The electric conductivity increased noticeably with NT concentration in the LC matrix, suggesting a percolation-like behaviour at NT content in the LC matrix below ~0.01 wt %. A marked difference in the measured electric conductivity values for the LC matrices of different polarity (e.g., cyanobiphenyl and azoxy) was observed. Assuming that supramolecular arrangement of NT dispersed in the LC matrix can be treated in a manner similar to the conventional non-mesogenic dopants, the observed behaviour is explained using our recent theoretical description of intermolecular interactions in anisotropic organic media formed by particles of essentially different size and anisometry.
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References
Lovat V, Pantarotto D, Lagostena L, Cacciari B, Grandolfo M, Righi M, et al. Nano Letters. 2005;5:1107-10.
Lisetski LN, Malikov VYa, Sidletski OTs, Stadnik PE. Mol.Cryst. Liq.Cryst. 1998;324:243-9.
Lisetski LN, Vashchenko OV, Tolmachev AV. Vodolazhskiy KB. Eur.Biophys.J. 2002;31:554-8.
Patrick DL, Wilkinson FS, Fergurgur TL. Proc.SPIE 2005;5936:59360A (8p.)
Russell JM, Oh S, LaRue I, Samulski ET. Thin Solid Films. 2006;509:53-7.
Song W, Kintoch IA, Windle AH. Science. 2003;302:1363.
Lynch MD, Patrick DL. Nano Letters. 2002;2:1197-201.
Song W, Windle AH. Macromolecules. 2005;38:6181-8.
Duran H, Gazdecki B, Yamashita A, Kyu T. Liq.Cryst. 2005;32:815-21.
Dierking I, Scalia G, Morales P, LeClere D. Advanced Materials. 2004;16:865-9.
Lisetski LN, Lebovka NI, Sidletsky OTs, Panikarskaya VD, Kasian NA, Kositsyn SS, et al. Functional Materials. 2007;14(2).
Melezhyk AV, Sementsov YuI, Yanchenko VV. Russian J.Appl.Chem. 2005;78:924-30.
Bezrodna T, Chashechnikova I, Dolgow L, Puchkovska G, Shaydyuk Ye, Lebovka N, et al. Liq.Cryst. 2005;32:1005-12.
Chashechnikova I, Dolgov L, Gavrilko T, Puchkovska G, Shaydyuk Ye, Lebovka N, et al. J.Mol.Struct. 2005;744-747:563-71.
Zhang Q, Rastogi S, Chen D, Lippits D, Lemstra PJ. Carbon. 2006;44:778-85.
Shtifanyuk PP, Dyomin AV, Fedoryako AP, Lisetski LN, Yakovenko SE. Functional Materials. 2004;11:661-70.
Shtifanyuk PP, Dyomin AV, Fedoryako AP, Lisetski LN, Yakovenko SE. Biophysical Bulletin. 2005;1(15):49-52.
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