Rotational tunneling studies of methane films adsorbed on MgO: Crossover from two-to-three dimensions?
✍ Scribed by J.Z. Larese; B. Asmussen; M.A. Adams; C. Carlile; D. Martin; M. Ferrand
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- English
- Weight
- 156 KB
- Volume
- 226
- Category
- Article
- ISSN
- 0921-4526
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✦ Synopsis
High-resolution inelastic neutron scattering techniques have been used to investigate the rotational tunneling properties of methane films adsorbed on the (100) face of MgO surfaces. The monolayer solid forms a square-x/2 x V/2 R45 commensurate lattice. Methane vapor pressure isotherms and elastic diffraction studies indicate tha~ four or five discrete layering transitions occur. Results will be presented which illustrate the tunneling properties of mOnolayer and bilayer CH 4. The possibility of observing a crossover from two-dimensional to three-dimensional behavior will also be discussed.