Spin locking and spin-lattice relaxation in a liquid entrapped in nanosized cavities

Edward B. Fel'Dman, Gregory B. Furman, Shaul D. Goren

Research output: Contribution to journalArticlepeer-review

13 Scopus citations

Abstract

We study the dynamics of the nuclear spins in a liquid entrapped in nanosized cavities. This spin system is like a solid system where all the spins are coupled equally with the same interaction constant. It is shown that, under the high temperature approximation, the system is described by the two-temperature quasi-equilibrium density matrix. We find that the mixing rate W and the local dipolar field ωloc depend on the cavity size V, shape F, and cavity orientation. For a large number of spins N the rate W decreases as the inverse square root of the number of spins, and is proportional to the concentration of the molecules, C. The spin-lattice relaxation rates, 1/T and 1/T1d, are proportional to C2/N. An NMR study of the dynamics of a spin system allows extraction of the cavity size and shape, its orientation relative to the magnetic field, and the molecular concentration.

Original languageEnglish
Pages (from-to)9200-9204
Number of pages5
JournalSoft Matter
Volume8
Issue number35
DOIs
StatePublished - 1 Jan 2012

ASJC Scopus subject areas

  • Chemistry (all)
  • Condensed Matter Physics

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