title: Proton spin-spin relaxation study of hydration of a model nanopore.
abstract: The hydration pattern of controlled pore glass, with pore diameter of 237 A, was investigated using nuclear magnetic resonance. Water proton spin-spin relaxation decay curves were monitored and modeled as two-component exponential decays as a function of hydration. The results are consistent with a geometric model involving a surface water layer and a bulk-like liquid fraction in the form of a plug. The amount of surface water increases as the sample hydrates, until hydration reached approximately a monolayer, at which point a water plug starts to form in the pore, and grow in length at the expense of the surface layer. The results are also analyzed in terms of, and compared to, a recently developed puddle pore-filling model [S.G. Allen, et al. J. Chem. Phys. 106 (1997) 7802-7809].
authors.affiliation: Department of Physics, University of Waterloo, Waterloo, Ont., Canada N2L 3G1.
authors.forename: W E
authors.initials: WE
authors.lastname: Troyer
authors.forename: R
authors.initials: R
authors.lastname: Holly
authors.forename: H
authors.initials: H
authors.lastname: Peemoeller
authors.forename: M M
authors.initials: MM
authors.lastname: Pintar