CUED Publications database

Hafnia nanoparticles - a model system for graphene growth on a dielectric

Kidambi, PR and Bayer, BC and Weatherup, RS and Ochs, R and Ducati, C and Szabó, DV and Hofmann, S (2011) Hafnia nanoparticles - a model system for graphene growth on a dielectric. Physica Status Solidi - Rapid Research Letters, 5. pp. 341-343. ISSN 1862-6254

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Abstract

We study graphene growth on hafnia (HfO 2) nanoparticles by chemical vapour deposition using optical microscopy, high resolution transmission electron microscopy and Raman spectroscopy. We find that monoclinic HfO 2 nanoparticles neither reduce to a metal nor form a carbide while nucleating nanometer domain-sized few layer graphene. Hence we regard this as an interesting non-metallic catalyst model system with the potential to explore graphene growth directly on a (high-k) dielectric. HfO 2 nanoparticles coated with few layer graphene by atmospheric pressure CVD with methane and hydrogen at 950 °C. (© 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim) Graphene growth on hafnia (HfO 2) nanoparticles by chemical vapour deposition (CVD) is studied. It is found that monoclinic HfO 2 nanoparticles neither reduce to a metal nor form a carbide while nucleating nanometer domain-sized few layer graphene. Hence the authors of this Letter regard this as an interesting non-metallic catalyst model system with the potential to explore graphene growth directly on a (high-k) dielectric. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Item Type: Article
Uncontrolled Keywords: Chemical vapour deposition Graphene Hafnium oxide Nanoparticles Oxide catalysts
Subjects: UNSPECIFIED
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 07 Mar 2014 11:23
Last Modified: 22 Dec 2014 01:21
DOI: 10.1002/pssr.201100155