Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/85703
Type: Artigo
Title: Patterning quasi-periodic Co 2D-clusters underneath graphene on SiC(0001)
Author: Lima, Luis Henrique de
Landers, Richard
Siervo
Abner de
Abstract: The behavior of Co nanoparticles (NPs) grown on graphene/SiC(0001) after oxygen exposure and heating in ultrahigh vacuum is investigated. The results of photoelectron spectroscopy (XPS) show that, as grown, the metal is on the surface of the graphene/SiC and suffers oxidation forming a single phase CoO when exposed to O2, even at low doses. After heating in ultrahigh vacuum (UHV), there is a deoxidation of cobalt and intercalation between the graphene (G) and the buffer layer (BL), as indicated by scanning tunneling microscopy (STM) and XPS. Cobalt forms almost regular small 2D clusters between G and BL. Moreover, graphene acts as a barrier to oxidation, preserving the metallic and the magnetic character of the material even when exposed to O 2. This paper shows a method for patterning chemically protected Co NPs on graphene/SiC(0001) which could be used in nanomagnetism based devices. © 2014 American Chemical Society.
The behavior of Co nanoparticles (NPs) grown on graphene/SiC(0001) after oxygen exposure and heating in ultrahigh vacuum is investigated. The results of photoelectron spectroscopy (XPS) show that, as grown, the metal is on the surface of the graphene/SiC and suffers oxidation forming a single phase CoO when exposed to O2, even at low doses. After heating in ultrahigh vacuum (UHV), there is a deoxidation of cobalt and intercalation between the graphene (G) and the buffer layer (BL), as indicated by scanning tunneling microscopy (STM) and XPS. Cobalt forms almost regular small 2D clusters between G and BL. Moreover, graphene acts as a barrier to oxidation, preserving the metallic and the magnetic character of the material even when exposed to O2. This paper shows a method for patterning chemically protected Co NPs on graphene/SiC(0001) which could be used in nanomagnetism based devices.
Subject: Cobalto
Grafeno sobre SiC
Espectroscopia de fotoelétrons por raios-X
Country: Estados Unidos
Editor: American Chemical Society
Citation: Chemistry Of Materials. American Chemical Society, v. 26, n. 14, p. 4172 - 4177, 2014.
Rights: fechado
Identifier DOI: 10.1021/cm501976b
Address: https://pubs.acs.org/doi/abs/10.1021%2Fcm501976b
Date Issue: 2014
Appears in Collections:IFGW - Artigos e Outros Documentos

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