Effects of local gates on the electrical transport of single-walled carbon nanotubes

We have studied the effect of local gates on the electrical transport properties of single-walled carbon nanotubes (SWNT). The local gate have been incorporated into individual SWNT by depositing Al top gate in between Au/Ti electrodes. Noticeable increase of resistance was observed after the deposition of the Al top gates, implying that the Al top gate acted as a barrier for electrical conduction.