1202.2905 (Ulrich Wurstbauer et al.)

Molecular beam growth of graphene nanocrystals on dielectric substrates    [PDF]

Ulrich Wurstbauer, Theanne Schiros, Cherno Jaye, Annette S. Plaut, Rui He, Albert Rigosi, Christopher Gutiérrez, Daniel Fischer, Loren N. Pfeiffer, Abhay N. Pasupathy, Aron Pinczuk, Jorge M. García

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.

View original: http://arxiv.org/abs/1202.2905