NMR Relaxation of Adsorbed Gases: Methane on Graphite
- 1 September 1972
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 57 (5) , 2199-2208
- https://doi.org/10.1063/1.1678553
Abstract
Spin‐lattice (T1) and spin‐spin (T2) relaxation times have been measured for methane (CH4) adsorbed on a graphitized carbon black, using pulse techniques at 30 MHz. Temperatures ranged from 4–100°K, fractional coverages from 0.02 to 0.9 of a statistical monolayer. The data indicate an adsorbed gas phase at high temperatures and low coverages and an adsorbed ``solid'' phase at low temperatures and low coverages. The data are discussed in terms of the molecular dynamics in the two phases and the barrier to rotation with respect to the surface.Keywords
This publication has 23 references indexed in Scilit:
- Two-dimensional critical behavior of rare gases adsorbed on graphitized carbon blackJournal of Colloid and Interface Science, 1968
- Nuclear magnetic resonance relaxation of molecules adsorbed on surfacesAdvances in Molecular Relaxation Processes, 1968
- The Physical adsorption of gases on solidsAdvances in Colloid and Interface Science, 1967
- High Stability ``Boxcar'' Integrator for Fast NMR Transients in SolidsReview of Scientific Instruments, 1966
- Hindered rotation in physical adsorptionTransactions of the Faraday Society, 1965
- rf Gate with 109 Carrier SuppressionReview of Scientific Instruments, 1961
- Modified Spin-Echo Method for Measuring Nuclear Relaxation TimesReview of Scientific Instruments, 1958
- Effects of Diffusion on Free Precession in Nuclear Magnetic Resonance ExperimentsPhysical Review B, 1954
- Spin EchoesPhysical Review B, 1950
- Relaxation Effects in Nuclear Magnetic Resonance AbsorptionPhysical Review B, 1948