Ph.D., Indian Institute of Science, Bangalore, India, 2004
Area(s) of Expertise
Prof. Kar’s interests lie in fundamental and applied research of graphene and related materials. Graphene is an exotic, single-atom-thick, perfectly two-dimensional, pure sp2-bonded allotrope of carbon with exceptionally high carrier mobility, mechanical strength, and thermal conductivity. Due to its unique gapless band-structure and low-energy linear dispersion E(k) = υFħ|k|, charge carriers in graphene are massless relativistic Dirac Fermions that demonstrate spectacular quantum properties such an anomalous quantum Hall effect, the Klein paradox, and a breakdown of the adiabatic Born-Oppenheimer approximation. Graphene also shows extraordinary optical and molecular interaction phenomena, resulting in a rich spectrum of novel 2D physics. At the same time, with its conductance being susceptible to modulation under a gate voltage, by photons, or by doping, and with a number of large-scale fabrication techniques becoming available, graphene is the world’s thinnest (single-atom-thick) transistor, photodetector, and molecular sensor.
The research group of Prof. Kar will look at exciting new directions related to the electronic and optical properties of graphene-based nanostructures. Topics of interest include:
- Electronic Transport
- Nanoelectric devices
- Engineered optics
- Electrochemical energy storage
- molecular sensing
In addition to graphene, Professor Kar is also interested in other nanomaterials such as metal nanoparticles, nanowires, nanotubes, fullerenes etc., and issues related to metal-insulator transitions, nanoscale magnetism and superconductivity. In particular, an ongoing project is related to the development of next generation nanoscale interconnects for gigascale integration using parallel architectures of single- and multi-wall carbon nanotubes (NSF funded).
Prof. Kar has a strong commitment to collaborative and multidisciplinary research in nanoscience and nanotechnology, and is always open to new and interesting frontiers of research in a multitude of disciplines.
204 Dana Research Center