I studied Single electron circuits when I was undergraduate. I made two simulators, one with new graphical tool for visualization of state probability and the other is high-speed simulator for SET and MOSFET integrated circuits.
I am in grad school and studying about quantum effects in nano-scale MOSFETs. Most of my study is done in a clean room for the fabrication of tiny MOSFETs and in measurement room for the measurement of the characteristics of them. Also I do some fancy simulations.