摘要: The interaction of oxygen with nickel deposited on polycrystalline aluminum surfaces has been investigated using Auger electron spectroscopy, X-ray photoelectron and angle-resolved spectroscopy. growth the occurs in two stages: formation NiAlx (x ≈ 0.45) islands 10 monolayers (ML) thick up to a coverage θNiAlx 0.7, followed by metallic 8 ML that grow over intermetallic previously formed. For containing alone, chemical information obtained analytical techniques shows exposure causes intermediate oxidation states Al+ Al2+, addition Al3+, which are attributed Al−O−Ni cross-linking bonds at interface. analysis Ni 2p peak shape no oxide is formed, small changes observed this band being atoms an aluminum-depleted layer ...
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