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Open AccessFeature PaperArticle

Re-Oxidation of ZnO Clusters Grown on HOPG

1
Departamento de Física Aplicada and Instituto Nicolás Cabrera, Universidad Autónoma de Madrid, Francisco Tomás y Valiente 7, E-28049 Madrid, Spain
2
Instituto de Cerámica y Vidrio, CSIC, Kelsen, 5, E-28049 Madrid, Spain
3
Instituto de Ciencias de Materiales de Madrid, CSIC, Sor Juana Inés de la Cruz 3, E-28049 Madrid, Spain
*
Author to whom correspondence should be addressed.
Coatings 2020, 10(4), 401; https://doi.org/10.3390/coatings10040401
Received: 19 March 2020 / Revised: 10 April 2020 / Accepted: 14 April 2020 / Published: 18 April 2020
(This article belongs to the Special Issue 1D, 2D and 3D ZnO: Synthesis, Characterization and Applications)
This 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. View Full-Text
Keywords: ZnO; HOPG; XPS; Raman spectroscopy; thermal treatments ZnO; HOPG; XPS; Raman spectroscopy; thermal treatments
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MDPI and ACS Style

Morales, C.; del Campo, A.; Méndez, J.; Prieto, P.; Soriano, L. Re-Oxidation of ZnO Clusters Grown on HOPG. Coatings 2020, 10, 401. https://doi.org/10.3390/coatings10040401

AMA Style

Morales C, del Campo A, Méndez J, Prieto P, Soriano L. Re-Oxidation of ZnO Clusters Grown on HOPG. Coatings. 2020; 10(4):401. https://doi.org/10.3390/coatings10040401

Chicago/Turabian Style

Morales, Carlos; del Campo, Adolfo; Méndez, Javier; Prieto, Pilar; Soriano, Leonardo. 2020. "Re-Oxidation of ZnO Clusters Grown on HOPG" Coatings 10, no. 4: 401. https://doi.org/10.3390/coatings10040401

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