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Pressure Induced Topological Phase Transitions in Membranes | | P.T.C. So
; Sol M. Gruner
; Shyamsunder Erramilli
; | | Date: |
4 Oct 1992 | | Subject: | cond-mat | | Abstract: | Some highly unusual features of a lipid-water liquid crystal are revealed by high pressure x-ray diffraction, light scattering and dilatometric studies of the lamellar (bilayer $L_{alpha}$) to nonlamellar inverse hexagonal ($H_{II}$) phase transition. (i) The size of the unit cell of the $H_{II}$ phase increases with increasing pressure. (ii) The transition volume, $Delta V_{bh}$, decreases and appears to vanish as the pressure is increased. (iii) The intensity of scattered light increases as $Delta V_{bh}$ decreases. Data are presented which suggest that this increase is due to the formation of an intermediate cubic phase, as predicted by recent theoretical suggestions of the underlying universal phase sequence. | | Source: | arXiv, cond-mat/9210003 | | Services: | Forum | Review | PDF | Favorites | |
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