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Dynamics of Defect Annihilation in Vitrified Liquid Crystalline (VLC) Thin Films Upon Thermal Annealing

  • H. Shi (a1), D. Katsis (a1), S. H. Chen (a1), M. E. De Rosa (a2), W. W. Adams (a2) and T. J. Bunning (a3)...

Abstract

Based on a series of model nematic and chiral-nematic compounds as well as a polymer analog, it was found that the annihilation of defects in a VLC system occurs at a much faster rate than its polymer analog. In chiral-nematic blends, the degree of structural similarity between the nematic host and the chiral dopant plays an important role; a wider biphasic region contributes to a slower annihilation process.

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[1] Shi, H. and Chen, S. H., Liquid Crystals, 17, 413 (1994).
[2] Shi, H. and Chen, S. H., Liquid Crystals, 18, 733 (1995).
[3] Chen, S. H., Mastrangelo, J. C., Shi, H., Bashir-Hashemi, A., Li, J., and Gelber, N., Macromolecules, 28, 7775 (1995).
[4] Shi, H. and Chen, S. H., Liquid Crystals, 19, 849 (1995).
[5] Shi, H. and Chen, S. H., Liquid Crystals, 19, 785 (1995).
[6] Shi, H., Chen, S. H., De Rosa, M. E., Bunning, T. J., and Adams, W. W., Liquid Crystals, 20, 277 (1996).
[7] Shi, H. and Chen, S. H., Macromolecules, 26, 5840 (1993).

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