Molecular beam growth of graphene nanocrystals on dielectric substrates

Autor:	Wurstbauer, Ulrich, Schiros, Theanne, Jaye, Cherno, Plaut, Annette S., He, Rui, Rigosi, Albert, Gutiérrez, Christopher, Fischer, Daniel, Pfeiffer, Loren N., Pasupathy, Abhay N., Pinczuk, Aron, García, Jorge M.
Rok vydání:	2012
Předmět:	Condensed Matter - Materials Science
Druh dokumentu:	Working Paper
DOI:	10.1016/j.carbon.2012.06.008
Popis:	We demonstrate the growth of graphene nanocrystals by molecular beam methods that employ a solid carbon source, and that can be used on a diverse class of large area dielectric substrates. Characterization by Raman and Near Edge X-ray Absorption Fine Structure spectroscopies reveal a sp2 hybridized hexagonal carbon lattice in the nanocrystals. Lower growth rates favor the formation of higher quality, larger size multi-layer graphene crystallites on all investigated substrates. The surface morphology is determined by the roughness of the underlying substrate and graphitic monolayer steps are observed by ambient scanning tunneling microscopy. Comment: Accepted in Carbon; Discussion section added; 20 pages, 6 figures (1 updated)
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1202.2905 Zobrazit plný text záznamu View this record from Arxiv