NMR elastometry of fluid membranes in the mesoscopic regime
Martínez, Gary V. (University of Arizona. Department of Chemistry)
Dykstra, Emily M. (University of Arizona. Department of Chemistry)
Lope-Piedrafita, Silvia (University of Arizona. Department of Physics)
Job, Constantin (University of Arizona. Department of Chemistry)
Brown, Michael F. (University of Arizona. Department of Chemistry)

Fecha:	2002
Resumen:	In solid-state 2H NMR of fluid lipid bilayers, quasielastic deformations at MHz frequencies are detected as a square-law dependence of the nuclear spin-lattice (R1Z) relaxation rates and order parameters (SCD). 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.
Derechos:	Tots els drets reservats.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió publicada
Publicado en:	Physical review. E : Statistical, nonlinear, and soft matter physics, Vol. 66, Number 5 (November 2002) , p. 050902/1-050902-4, ISSN 1539-3755

DOI: 10.1103/PhysRevE.66.050902

4 p, 434.6 KB

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