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- W2049409970 abstract "The interaction of metals with oxide surfaces plays an important role in the manner of growth of the metal/oxide interface and eventually for the electronic properties and chemical reactivity of the resultant surface. We have investigated such effects for vanadium on alumina. By using a thin alumina film grown on a NiAl(110) as a model substrate, we were able to apply scanning tunneling microscopy (STM) as well as electron spectroscopic techniques without charging problems. According to our STM results, vanadium deposition at 300 K results in the formation of small thin particles/islands partly incorporated into the film at low coverages. With increasing coverage three-dimensional growth is found. The thermal stability and the growth behaviour of these nuclei at elevated deposition temperatures (≥600 K) are in agreement with a strong metal substrate interaction. In the coverage regime below 0.1 ML, X-ray photoelectron and X-ray absorption spectroscopy data provide evidence that the deposits are oxidized to Vx+, 1<x<2. Furthermore, we have studied the interaction at 720 K and in an ambient atmosphere of oxygen in order to check how vanadium reacts with the alumina film under more severe conditions. In fact, a thickening of the alumina film has been observed, which we ascribe to a catalytic effect of vanadia on the alumina film growth." @default.
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- W2049409970 date "1999-07-01" @default.
- W2049409970 modified "2023-09-26" @default.
- W2049409970 title "Growth, electronic properties and reactivity of vanadium deposited onto a thin alumina film" @default.
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- W2049409970 doi "https://doi.org/10.1016/s0039-6028(99)00400-8" @default.
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