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Effective Hamiltonian for a liquid–gas interface fluctuating around a corrugated cylindrical substrate in the presence of van der Waals interactions

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  • Dutka, F.
  • Napiórkowski, M.

Abstract

We investigate liquid layers adsorbed at spherical and corrugated cylindrical substrates. The effective Hamiltonians for the liquid–gas interfaces fluctuating in the presence of such curved substrates are derived via the mean-field density functional theory. Their structure is compared with the Helfrich Hamiltonian which is parametrized by the bending and Gaussian rigidity coefficients. For long-ranged interparticle interactions of van der Waals type these coefficients turn out to be non-universal functions of interfacial curvatures; their form varies from one interface to another. We discuss the implications of the structure of these functions on the effective Hamiltonian.

Suggested Citation

  • Dutka, F. & Napiórkowski, M., 2009. "Effective Hamiltonian for a liquid–gas interface fluctuating around a corrugated cylindrical substrate in the presence of van der Waals interactions," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 388(15), pages 3063-3071.
    • Handle: RePEc:eee:phsmap:v:388:y:2009:i:15:p:3063-3071
    DOI: 10.1016/j.physa.2009.04.009
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