Journal
NANOSCALE
Volume 10, Issue 26, Pages 12779-12787Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8nr03210f
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Funding
- ERC-synergy program [ERC-2013-SYG-610256 Nanocosmos]
- Spanish MINECO [MAT2014-59772-C2-2-P]
- EU Graphene Flagship [1 696656, 2 785219]
- 'Ramon y Cajal' Program of MINECO [RYC-2014-16626]
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Direct graphene growth on silicon with a native oxide using plasma enhanced chemical vapour deposition at low temperatures [550 degrees C-650 degrees C] is demonstrated for the first time. It is shown that the fine-tuning of a two-step synthesis with gas mixtures C2H2/H-2 yields monolayer and few layer graphene films with a controllable domain size from 50 nm to more than 300 nm and the sheet resistance ranging from 8 k Omega sq(-1) to less than 1.8 k Omega sq(-1). Differences are understood in terms of the interaction of the plasma species -chiefly atomic H - with the deposited graphene and the native oxide layer. The proposed low temperature direct synthesis on an insulating substrate does not require any transfer processes and improves the compatibility with the current industrial processes.
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