Transition metal oxides: Extra thermodynamic stability as thin films - art. no. 066106

被引：80

作者：

Campbell, CT ^{[1
]}

机构：

[1] Univ Washington, Dept Chem, Seattle, WA 98195 USA

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 96卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.96.066106

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The oxides of many transition metals wet their own metal surface. The adhesion energy at this interface (E-adh,E-ox/m) provides extra stabilization, which lowers the O-2 pressure required for oxide stability as a thin film below that required for bulk-oxide stability by the factor exp[(2 gamma(g/ox)-E-adh,E-ox/m)/(tN(ox)RT)], where gamma(g/ox) is the surface energy of the oxide, t is the oxide film thickness, and N-ox is the oxygen concentration in the bulk oxide (moles O-2 per volume). For oxide films only similar to 1 nm thick, this correction can be many orders of magnitude. This may extend to other compounds.

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