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Nanoscale Electronics and Mechanics


In the Bolotin group we study electrical and mechanical properties of nanoscale materials. We are particularly interested in graphene, a recently discovered two-dimensional form of carbon. Electrons in graphene are predicted to behave just like zero-mass relativistic particles. To probe this exotic behavior, we developed approaches to fabricate  single sheets of graphene that are suspended and electrically contacted. Very high values of carrier mobility in these devices allows us to access multifaceted physics of interacting electrons in graphene.

We also explore mechanical properties of graphene, both the toughest and the lightest material in existence, using MHz-frequency electromechanical resonators fabricated out of individual graphene sheets. Recently, we developed these resonators into uniquely sensitive force and mass sensors. We are now exploring minute forces at the nanoscale and develop approaches to weigh atom-sized objects.

Finally, we are interested in applications of nanomaterials and collaborate with Graphene Laboratories Inc, a start-up company, towards developing functional graphene membranes.

Recent representative publications:
- Kirill Bolotin, Fereshte Ghahari, Michael D. Shulman, Horst L.Stormer, and Philip Kim, “Observation of the Fractional Quantum Hall Effect in Graphene”, Nature 462, 196 (2009)
- Changyao Chen, Sami Rosenblatt, Kirill I. Bolotin, William Kalb, Philip Kim, Ioannis Kymisis, Horst L. Stormer, Tony F. Heinz, and James Hone, “Performance of Monolayer Graphene Nanomechanical Resonators with Electrical Readout”, Nature Nanotechnology 4, 861 (2009)
- K. I. Bolotin, K. J. Sikes, J. Hone, P. Kim, H. L. Stormer, “Temperature dependent transport in suspended graphene”, Phys. Rev. Lett. 101, 096802 (2008).


Vanderbilt University