Determination of Step Free Energies from Island Shape Fluctuations on Metal Surfaces
| Autor: | Laurens K. Verheij, Dietmar C. Schlößer, Georg Rosenfeld, George Comsa |
|---|---|
| Přispěvatelé: | Physics of Interfaces and Nanomaterials |
| Rok vydání: | 1999 |
| Předmět: |
Surface (mathematics)
Materials science Scanning tunneling spectroscopy General Physics and Astronomy Nanotechnology Molecular physics law.invention Crystal Metal Absolute measurement law visual_art ddc:550 visual_art.visual_art_medium Free energies Scanning tunneling microscope Energy (signal processing) |
| Zdroj: | Physical review letters 82, 3843-3846 (1999). doi:10.1103/PhysRevLett.82.3843 Physical review letters, 82(19), 3843-3846. American Physical Society |
| ISSN: | 1079-7114 0031-9007 |
| Popis: | The absolute measurement of free energies associated with crystal steps on a metal surface has been a long-standing problem. We report a reliable estimate of the step free energy on a Cu(111) crystal surface, based on an analysis of island shape fluctuations directly imaged by scanning tunneling microscopy. The result of 0.22 eV per atomic distance for steps running into close-packed directions is in good agreement with theoretical predictions. |
| Databáze: | OpenAIRE |
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