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Zachary Winter: The role of copper orientation on oxide formation and force adhesion of CVD graphene

posted 8 Aug 2019, 03:23 by info admin   [ updated 12 Aug 2019, 07:09 ]
Zachary C. M. Winter1, Oliver Burton2, Marieke Jung1, Jan Karthein1, Benjamin Zenz1, Ann-Kathrin Müller1, Stefan Hofmann2, Bernd Beschoten1, Christoph Stampfer1 
1 JARA-FIT and 2nd Institute of Physics, RWTH Aachen University, 52074 Aachen, Germany 
2 Department of Engineering, University of Cambridge, 9 JJ Thomson Avenue, Cambridge CB3 0FA, United Kingdom 

CVD on copper has allowed for controlled growth of graphene up to wafer size. It remains, however, a technical challenge to transfer 2D materials of larger scale to desired substrates. The dry-transfer technique remains promising to preserve the quality of graphene by limiting contact with volatile etching agents and works when the coupling strength to the copper substrate is reduced by the formation of an interface oxide layer, allowing another material with higher van-der-Waals attractive force to pick-up the CVD graphene. Up to now, research has only been done on three main copper orientations (100), (110), and (111). We introduce the addition of high resolution force adhesion measurements on polycrystalline copper along with Raman spectroscopy to investigate the role of copper orientation on the oxide formation with the goal of improving dry-transferred graphene on a larger scale.  

Zachary Winter is currently a PhD student at the RWTH Aachen University. The primary focus is on high quality scalability using CVD graphene and dry-transfer techniques to reduce contamination. Zachary received his master’s in physics and nanoelectronics from the RWTH Aachen University in 2017 with Prof. Christoph Stampfer and his bachelors in physics from Montana State University in 2014 where he worked on growth and magnetic transport measurements of bulk materials. Also during his time at the RWTH University, Zachary filed a patent for a device and method for determining air velocity. In the future, he is interested in starting his own business or collaborating in a small team to bring current physics research topics to solve industry goals.