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Re-Oxidation of ZnO Clusters Grown on HOPG

AuthorsMorales, Carlos; Campo, Ángel Adolfo del ; Méndez, Javier ; Prieto, Pilar ; Soriano, Leonardo
Issue Date18-Apr-2020
PublisherMultidisciplinary Digital Publishing Institute
CitationCoatings 10 (4): 401 (2020)
AbstractThis article studies the chemical interaction between ZnO and highly oriented pyrolytic graphite for as grown and thermally treated samples. In-situ X-ray photoelectron spectroscopy and ex-situ Raman spectroscopy confirm that graphite is affected by these processes, becoming oxidized and defective only in the presence of ZnO clusters that become recrystallized upon thermal re-oxidation processes performed at 400 °C. By comparing these results with other identical experiments performed with ZnO clusters grown on graphene and even with CoO clusters grown on graphite, the present results show how the interaction of the ZnO clusters with graphitic substrates depend on two factors—firstly, the mode of growth and corresponding morphology, and secondly, the reactivity of the graphitic substrates, either graphene or graphite. The results presented here will help us understand the fundamental interactions in ZnO/graphitic heterostructures and to define their operating limits.
Identifiersdoi: 10.3390/coatings10040401
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