The Influence of Van der Waals Forces on the Alignment of Nematic Liquid Crystals in Magnetic Fields
作者： P. Richmond , L. R. White
DOI: 10.1080/15421407408083133
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摘要: Abstract We calculate the van der Waals free energy for a nematic liquid crystal confined between two parallel dielectric half spaces. consider configurations: (i) director (direction of anisotropic axis) perpendicular to interface, (ii) interface. Assuming these energies dominate, their differences are compared configurations in presence uniform magnetic field For given specimen thickness Hc is found such that H alignment will occur. The dependence on calculated and experimental evidence discussed. When one spaces replaced by metal space, we predict no critical exist.
sci-hub.se 参考文章(12)
J. Mahanty, B. W. Ninham, Dispersion contributions to surface energy Journal of Chemical Physics. ,vol. 59, pp. 6157- 6162 ,(1973) , 10.1063/1.1679985
P. Richmond, B. W. Ninham, Calculations of van der Waals forces across films of liquid helium using Lifshitz theory Journal of Low Temperature Physics. ,vol. 5, pp. 177- 189 ,(1971) , 10.1007/BF00629571
D.J Mitchell, P Richmond, A general formalism for the calculation of free energies of inhomogeneous dielectric and electrolytic systems Journal of Colloid and Interface Science. ,vol. 46, pp. 118- 127 ,(1974) , 10.1016/0021-9797(74)90031-9
L. D. Landau, J. S. Bell, J. B. Sykes, E. H. Dill, E. M. Lifshitz, Electrodynamics of continuous media ,(1960)
V. A. Parsegian, George H. Weiss, Dielectric Anisotropy and the van der Waals Interaction between Bulk Media Journal of Adhesion. ,vol. 3, pp. 259- 267 ,(1972) , 10.1080/00218467208072197
E. S. Sabisky, C. H. Anderson, Verification of the Lifshitz Theory of the van der Waals Potential Using Liquid-Helium Films Physical Review A. ,vol. 7, pp. 790- 806 ,(1973) , 10.1103/PHYSREVA.7.790
P Richmond, B W Ninham, A note on the extension of the Lifshitz theory of van der Waals forces to magnetic media Journal of Physics C: Solid State Physics. ,vol. 4, pp. 1988- 1993 ,(1971) , 10.1088/0022-3719/4/14/014
N.G. Van Kampen, B.R.A. Nijboer, K. Schram, On the macroscopic theory of Van der Waals forces Physics Letters A. ,vol. 26, pp. 307- 308 ,(1968) , 10.1016/0375-9601(68)90665-8
J. N. ISRAELACHVILI, D. TABOR, The measurement of van der Waals dispersion forces in the range 1.5 to 130 nm Nature. ,vol. 331, pp. 19- 38 ,(1972) , 10.1038/PHYSCI236106A0
W. Maier, A. Saupe, Untersuchungen mit linear polarisiertem Ultraviolett an der festen, kristallin-flüssigen und normal-flüssigen Phase despp’-Azoxyanisols. I. Experimenteller Teil1 Zeitschrift für Physikalische Chemie. ,vol. 6, pp. 327- 344 ,(1956) , 10.1524/ZPCH.1956.6.5_6.327