Materials Science Seminar Presents: Dr. Vikram Deshpande
Dr. Vikram Deshpande
Tuesday, May 22, 2012 2:00 P.M. 106 Spalding
Refreshments will be served at 3:45 p.m. in 113 Spalding
Atomically-Thin Electronic Materials and Devices
Atomically-thin graphene, BN and metal dichalcogenides have remarkable properties different from their bulk counterparts. These properties, such as high carrier mobilities, tunable bandgaps, superconductivity, magnetism, optical transparency, extreme mechanical flexibility and quantum confinement, open avenues for completely new types of electronic devices. However, their atomically-thin nature also entails strong perturbation by the substrate and immediate environment; as a result, intrinsic properties of such materials are often masked by extraneous effects.
I will discuss my work synthesizing and fabricating high-quality freely-suspended nano-devices of such materials using a combination of mechanical exfoliation, chemical vapor deposition and transfer printing, to access their intrinsic properties. Measurements include a combination of transport, thermodynamic and spectroscopic techniques, many of which I have developed for the first time for these materials.
Such measurements also highlight the surprising consequences of electronic correlations. I will conclude by discussing the application of these synthesis and measurement techniques to engineer properties of a wide variety of atomically-thin materials and develop new types of devices.