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Molecular self-organization in cylindrical nanocavities

S. G. Cloutier*, J. N. Eakin, R. S. Guico, M. E. Sousa, G. P. Crawford, and J. M. Xu

  • Division of Engineering and Department of Physics, Brown University, Providence, Rhode Island 02912, USA

  • *Email address: Sylvain_Cloutier@brown.edu
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Phys. Rev. E 73, 051703 – Published 10 May, 2006

DOI: https://doi.org/10.1103/PhysRevE.73.051703

Abstract

We studied molecular organization in cylindrical nanocavities using liquid crystals. NMR analysis shows high surface-induced ordering way above the bulk critical temperature. The surface-order evolution reveals replacement of the isotropic phase by a paranematic phase and surface-induced disordering in the nematic phase. Due to strong surface potential and nanoconfinement, complete wetting and continuous evolution of the surface-order parameter are observed through the nematic-paranematic transition. As we show, the counter-intuitive absence of complete phase transition at the interface while an abrupt phase transition was measured in the averaged order parameter is in good agreement with established theories.

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Phys. Rev. E 73, 051703– Published 10 May, 2006
  • Received 16 May 2005

© 2006 American Physical Society

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