Instability of myelin tubes under dehydration: Deswelling of layered cylindrical structures

C. M. Chen, C. F. Schmidt, P. D. Olmsted, F. C. MacKintosh

研究成果: 雜誌貢獻期刊論文同行評審

摘要

We report experimental observations of an undulational instability of myelin figures. Motivated by this, we examine theoretically the deformation and possible instability of concentric, cylindrical, multilamellar membrane structures. Under conditions of osmotic stress (swelling or dehydration), we find a stable, deformed state in which the layer deformation is given by [formula presented] where [formula presented] is the area compression modulus, B is the interlayer compression modulus, and h is the repeat distance of layers. Also, above a finite threshold of dehydration (or osmotic stress), we find that the system becomes unstable to undulations, first with a characteristic wavelength of order [formula presented] where [formula presented] is the standard smectic penetration depth and [formula presented] is the thickness of dehydrated region.

原文英語
頁(從 - 到)4
頁數1
期刊Physical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
64
發行號5
DOIs
出版狀態已發佈 - 2001

ASJC Scopus subject areas

  • 統計與非線性物理學
  • 統計與概率
  • 凝聚態物理學

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