Capacitance of nanostructures

Modeling capacitance of nanostructures in nanoscale circuits presents particular challenge because of contribution from electrodes, which can usually be neglected in modeling conductance, or even capacitance of macrodevices. We present a model of capacitance of a nano-gap configuration and applied to calculate capacitance of a carbon nanotube nano-gap and effective capacitance of a buckyball inside the nano-gap. The capacitance of the carbon nanotube nano-gap increases with length of electrodes, which shows the important contribution from the electrodes in dynamic transport properties of nanoscale circuits.