Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session L14: Electronic Interactions in Twisted Bilayers
11:15 AM–2:15 PM,
Wednesday, March 6, 2019
BCEC
Room: 153C
Sponsoring
Unit:
DCMP
Chair: Cory Dean
Abstract: L14.00010 : Atmospheric Pressure Chemical Vapor Deposition of Twisted Bilayer Graphene on Copper Foil Substrates*
1:03 PM–1:15 PM
Presenter:
Lucas Hanson
(Rutgers University, New Brunswick)
Authors:
Lucas Hanson
(Rutgers University, New Brunswick)
Nikhil M Tilak
(Rutgers University, New Brunswick)
Michael Altvater
(Rutgers University, New Brunswick)
Brian J Ellsworth
(Rutgers University, New Brunswick)
Eva Andrei
(Rutgers University, New Brunswick)
copper foil substrates represents a promising paradigm for the fabrication of Bernal stacked and
twisted bilayer graphene samples. Large scale growth techniques will be essential in developing
the potential applications of bilayer graphene, such as ultra high frequency field effect transistors
or novel photonic devices. Using a quartz tube and tube furnace, copper foil substrates, argon
and hydrogen forming gas, and a methane carbon feedstock, we studied a variety of different
APCVD recipes to determine the optimal growth parameters for depositing graphene bilayers.
Additionally, various copper substrate pretreatment techniques were tested, including surface
etching, electrochemical polishing, wet oxidation, and argon annealing. Preliminary results
suggest that increased bilayer grain sizes can be achieved by flowing higher methane
concentrations for longer time periods during the growth stage, and optical microscopy of single
and bilayer grain alignment suggest that small twist angles can be achieved using our APCVD method.
*Work supported by DOE-FG02-99ER45742, NSF DMR 1708158, NSF EFRI 1433307.
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