Due to its excellent physical and chemical properties,carbon nanotubes (CNTs) have been widely studied and applied in various fields. One of the most important applications for CNTs is to construct the electronic and photoelectric devices.A CNT field-effect transistor with asymmetric contacts is studied in this paper.In the device,individual single-walled CNT is used as the channel,which forms the asymmetrical Schottky contacts with the low work-function metal (aluminum) and the high work-function metal (palladium),respectively.This device is promising to be used in next-generation integrated circuit.