Determining whether metals nucleate homogeneously on graphite: A case study with copper
Journal Article
·
· Physical Review. B, Condensed Matter and Materials Physics
- Ames Laboratory
- Iowa State University
We observe that Cu clusters grow on surface terraces of graphite as a result of physical vapor deposition in ultrahigh vacuum. We show that the observation is incompatible with a variety of models incorporating homogeneous nucleation and calculations of atomic-scale energetics. An alternative explanation, ion-mediated heterogeneous nucleation, is proposed and validated, both with theory and experiment. This serves as a case study in identifying when and whether the simple, common observation of metal clusters on carbon-rich surfaces can be interpreted in terms of homogeneous nucleation. We describe a general approach for making system-specific and laboratory-specific predictions.
- Research Organization:
- Ames Lab., Ames, IA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC02-07CH11358
- OSTI ID:
- 1163921
- Report Number(s):
- IS-J 8428; PRBMDO; ArticleNumber: 195406
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 90, Issue 19; ISSN 1098-0121
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
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