Abstract
A calorimetric study of low-coverage (0.13-0.36 layer) Ne films adsorbed on graphite foam explores the broadening of melting peaks in the vicinity of the two-dimensional triple point. Preliminary analysis confirms earlier indications that premelting is due to edge melting of long strips of film that decorate linear defects and steps on the substrate. A new model that incorporates these substrate effects and a new method of analysis that considers coverage-dependent trends have been developed to fit the data. The fitting indicates that additional substrate effects complicate the analysis; these are discussed, and it is concluded that adsorbate size effects are relatively unimportant, but that heterogeneity in the substrate binding energy may augment the edge melting process.
Original language | English |
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Journal | Journal of Physics Condensed Matter |
Volume | 4 |
Issue number | 36 |
Pages (from-to) | 7317-7332 |
ISSN | 0953-8984 |
DOIs | |
Publication status | Published - 1992 |