NMR elastometry of fluid membranes in the mesoscopic regime

Gary V. Martinez, Emily M. Dykstra, Silvia Lope-Piedrafita, Constantin Job, Michael F. Brown

Research output: Contribution to journalArticlepeer-review

43 Scopus citations

Abstract

In solid-state [formula presented] NMR of fluid lipid bilayers, quasielastic deformations at MHz frequencies are detected as a square-law dependence of the nuclear spin-lattice [formula presented] relaxation rates and order parameters [formula presented] The signature square-law slope is found to decrease progressively with the mole fraction of cholesterol and with the acyl chain length, due to a stiffening of the membrane. The correspondence to thermal vesicle fluctuations and molecular dynamics simulations implies that a broad distribution of modes is present, ranging from the membrane size down to the molecular dimensions.

Original languageEnglish (US)
Pages (from-to)4
Number of pages1
JournalPhysical Review E - Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics
Volume66
Issue number5
DOIs
StatePublished - Nov 27 2002

ASJC Scopus subject areas

  • Statistical and Nonlinear Physics
  • Statistics and Probability
  • Condensed Matter Physics

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