Putting things on top of other things: Fabrication and applications of van der Waals heterostructures
Monday, 17 Mar. 2014, 17:30 - 18:30
Presenter: James Hone; Columbia University Dept. of Mechanical Engineering
Host: Wiener Physikalisches Kolloquium
Where: Lise-Meitner-Hörsaal, Boltzmanngasse 5, 1090 Wien
Abstract: Two-dimensional materials such as graphene can achieve spectacular performance but are highly sensitive to disorder from the environment. We have developed techniques to controllably ‘stack’ graphene on insulating hexagonal boron nitride, which dramatically reduces disorder and increases performance. In addition, these heterostructures can display novel behavior due to the presence of ‘superlattice’ potentials arising from the graphene-BN stacking. In recent work, we have extended these techniques to create fully encapsulated devices whose performance approaches the ideal behavior of sgraphene. These techniques can be used to create heterostructures of other 2D materials such as MoS2 and WSe2. I will describe our studies of basic science and applications of these devices.
About James Hone
James Hone is currently Professor of Mechanical Engineering at Columbia University. He received his PhD in experimental condensed matter physics from UC Berkeley in 1998, and did postdoctoral work at the University of Pennsylvania and Caltech, where he was a Millikan Fellow. He joined the Columbia faculty in 2003.
His current research interests include synthesis, characterization, manipulation, and applications graphene, and other 2D materials; nanomechanical devices; and nano-biology.