The growth process of multilayer methane on graphite was studied by a.c. heat-capacity technique in the temperature range 4-40 K. The heat-capacity anomalies related to orientational-ordering transitions show gradual change with increasing coverage towards bulk-like behaviour. This result is consistent with the conclusion that methane grows layer by layer on graphite surface for temperatures > 20 K. Another heat-capacity anomaly, unrelated to orientational-ordering transitions, was observed near 11 K for methane film with coverages higher than two layers. We suggest this anomaly is probably related to a structural transition in the multilayer film, possibly due to a wetting transition.
|Original language||English (US)|
|Number of pages||10|
|Journal||Journal of the Chemical Society, Faraday Transactions 2: Molecular and Chemical Physics|
|State||Published - Dec 1 1986|
All Science Journal Classification (ASJC) codes
- Atomic and Molecular Physics, and Optics
- Physical and Theoretical Chemistry