Carbon Nanoelectronics Dr Marc Bockrath In my talk

Carbon Nanoelectronics Dr. Marc Bockrath In my talk I will discuss a number of our ongoing research on carbon nanotubes and graphene. Our efforts are aimed at studying fundamental physics in nanostructures as well as developing sensing and device applications. In recent work, we have demonstrated that dilute hole systems in carbon nanotubes are manifestations of a one-dimensional Wigner crystal. The holes then form a spin chain that shows distinct regimes of magnetic ordering versus magnetic field and charge density. The isolated spin in the chains may be independently manipulated in future work and thereby form a basis for solid state quantum information processing. We have also taken steps towards using carbon nanotubes as ultrasensitive mass detectors. Individual single-walled nanotubes are vibrated near the resonant frequency and we have detected frequency changes in response to mass loading, with a noise floor of ~100 atomic mass units per root Hz. The prospects for single atomic mass unit sensitivity and chemical or isotope discrimination will be discussed. Furthermore, we have used DNA (deoxyribonucleic acid) templates to self-assemble nanotube crossbar devices. Theses devices show transistor behavior, and suggest the possibility of using DNA-directed self-assembly to construct complex circuits such as memory elements or logic gates. Finally, we have developed a nanoscale voltage-programmable switch based on graphene. These switches can be cycled many tens of thousands of times without degrading and may enable non-volatile memories or logic gates to be incorporated into graphene electronics. .