Variations in the Nature of Metal Adsorption on Ultrathin Al(2)O(3) Films

Journal Article · Mon Nov 23 23:00:00 EST 1998 · Physical Review Letters

OSTI ID:2003

Bogicevic, A ^[1]; Jennison, D R

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1. Sandia National Laboratories

First-principles density-functional calculations are used to study metal adsorption (Li, K, Y, Nb, Ru, Pd, Pt, Cu, Ag, Au, and Al at 1/3-4 monolayer coverages) atop 5 ~ A1203 films on Al(Ill). The oxide-metal bond is ionic at Iow coverages but, with interesting exceptions, caused by polari@i ,~-cE!vED at high coverages where the overlayer is metallic. Binding trends are explained in terms of s'imp e concepts. Increasing overlayer thickness can cause the adsorbate-oxide interface structure to than . %lEc o ~ 1998 and while some metals wet, most do not.

• Research Organization: Sandia National Laboratories, Albuquerque, NM, and Livermore, CA
• Sponsoring Organization: USDOE
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 2003
• Report Number(s): SAND98-2634J; ON: DE00002003
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
66 PHYSICS
Adsorption
Aluminium Oxides
Thin Films