Pressure Induced Topological Phase Transitions in Membranes

Abstract

Some highly unusual features of a lipid-water crystal are revealed by high pressure x-ray diffraction, light scattering and dilatometric studies of the lamellar (bilayer L alpha) to nonlamellar inverse hexagonal (H sub II) phase transition: (1) The size of the unit cell of the H (Sub II) phase increases with increasing pressure. (2) The transition volume, delta V (sub bh) decreases. Data are presented which suggest that his increase is due to the information of an intermediate cubic phase, consistent with theoretical suggestions of an underlying universal phase sequence.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1992
Accession Number
ADA265212

Entities

People

  • P. T. So
  • Shyamsunder Erramilli
  • Sol M. Gruner

Organizations

  • Princeton University

Tags

DTIC Thesaurus Topics

  • Block Copolymers
  • Diffraction
  • Geometric Forms
  • High Pressure
  • Latent Heat
  • Light Scattering
  • Lines (Geometry)
  • Liquid Crystals
  • Measurement
  • Phase Diagrams
  • Phase Transformations
  • Rate Of Formation
  • Scattering
  • Transition Temperature
  • Two Dimensional
  • X Rays
  • X-Ray Diffraction

Fields of Study

  • Physics

Readers

  • Materials Science and Engineering.
  • Molecular and Cellular Biochemistry