Abstracts2014‎ > ‎

Stephan Hofmann: Towards an understanding of catalytic, scalable graphene growth

posted 2 Apr 2014, 02:02 by Mette Lund Meisner
Stephan Hofmann, Department of Engineering, University of Cambridge, United Kingdom

The commercial potential of graphene hinges on the development of growth and integration techniques that are scalable and allow an adequate level of structural control. Chemical vapor deposition (CVD) now dominates the carbon nanotube market and rapid progress is being made to develop it also for graphene manufacture. A key challenge thereby is to increase the level of structural growth selectivity and control. With a focus on diverse graphene applications in the electronics and display industry, we are developing process rationales that are informed by a fundamental understanding of the catalytic growth process. This talk will review our current understanding of graphene CVD based on model catalyst systems, including results [1-5] from a range of in-situ characterization methods such as environmental scanning and transmission electron microscopy, high-pressure X-ray photoelectron spectroscopy, X-ray diffraction and scanning tunneling microscopy. The talk thereby will also outline current challenges in developing graphene as industrial device material. 
1. Kidambi et al. Nano Lett. 13, 4769 (2013), 2. Weatherup et al. Nano Lett. 11, 4154 (2011), 3.Weatherup et al. Nano Lett 13, 4624 (2013), 4. Patera et al. ACS Nano 7, 7901 (2013), 5. Weatherup et al. ACS Nano 6, 9996 (2012).

Dr. Stephan Hofmann is a Reader in Nanotechnology at the Engineering Department of the University of Cambridge, where he heads a research group that explores novel materials, metrology and device architectures. A current research focus is the understanding of growth and integrated processing strategies for nanomaterials including carbon nanotubes, graphene and semiconductor nanowires. He graduated in Physics at the Technische Universität München and obtained his Ph.D. at the University of Cambridge. Prior to his current position, he held a Dorothy Hodgkin Fellowship by the Royal Society (UK) and a Research Fellowship at Peterhouse, Cambridge, where he is currently a Fellow. He is the recipient of an ERC Starting Independent Researcher Grant, is co-director of an innovative Doctoral Training Centre in Nanotechnology and is currently principal and co- investigator on a number of large projects with a world-wide network of collaborators and industry partnerships. He also received the Fonda-Fasella Award of the Elettra Synchrotron and is the 2014 awardee for the Journal of Physical Chemistry C Lectureship.