Effects of Amplitude on Carbon Nanotube Nanowelding

Abstract Electrophoretic deposition was used to deposite carbon nanotubes (CNTs) on Ti-coated silicon wafers. The effects of amplitude on the CNT nanowelding were studied. The results show that CNTs are compacted and bonded with Ti at the amplitude of 30%. At higher amplitude (60% and 80%), CNTs are cut short or even destructed due to the higher ultrasonic energy and shear force. Applying nanowelding to CNT field effect transistor, the on-off ratio and transconductance are enhanced significantly at the welding amplitude of 30%. Keywords: Carbon nanotubeultrasonic nanoweldingfield effect transistor Acknowledgments This work is supported by Research Fund of Xuzhou Normal University No. 10XLA04, 09XLR10, and Xuzhou Science and Technology Program No. XZZD1001. The authors would be like to thank Dr. Qiming Mao for providing the technological supports.