Now showing items 1-6 of 6

    • Absorption-spectral features of single-walled carbon nanotubes 

      Zhao, Yang; Wang, Xiujun; Ma, Chi Chiu; Chen, Guan Hua (2004)
      We present a visual, intuitive connection between optical absorption line shapes and the underlying carbon nanotube structures. Within the tight-binding model, the absorption spectra can be linked directly ...
    • Energy dissipation mechanisms in carbon nanotube oscillators 

      Zhao, Yang; Ma, Chi Chiu; Chen, Guan Hua; Jiang, Qing (2003)
      Energy transfer from the translational degrees of freedom to phonon modes is studied for isolated systems of two coaxial carbon nanotubes, which may serve as a nearly frictionless nano-oscillator. It is found that for ...
    • Energy exchanges in carbon nanotube oscillators 

      Zhao, Yang; Ma, Chi Chiu; Wong, Lai Ho; Chen, Guan Hua; Xu, Zhiping; Zheng, Quan Shui; Jiang, Qing; Chwang, Allen T. (2006)
      Energy exchanges between orderly intertube axial motion and vibrational modes are studied for isolated systems of two coaxial carbon nanotubes at temperatures ranging from 300 to 500 K. It is found that the excess ...
    • Quasi-reversible energy flows in carbon-nanotube oscillators 

      Zhao, Yang; Ma, Chi Chiu; Wong, Lai-Ho; Chen, Guan Hua; Xu, Zhiping; Zheng, Quan Shui; Jiang, Qing; Chwang, Allen T. (2006)
      Quasi-reversible energy flows between orderly intertube axial motion and vibrational modes are studied for isolated systems of two coaxial carbon nanotubes at temperatures ranging from 300 K to 500 K. It is found that the ...
    • Trans-phonon effects in ultra-fast nanodevices 

      Xu, Zhiping; Zheng, Quan Shui; Jiang, Qing; Ma, Chi Chiu; Zhao, Yang; Chen, Guan Hua; Gao, H.; Ren, G. X. (2008)
      We report a novel phenomenon in carbon nanotube based ultra-fast mechanical devices, the trans-phonon effect, which resembles the transonic effects in aerodynamics. It is caused by dissipative resonance of nanotube phonons ...
    • A tribological study of double-walled and triple-walled carbon nanotube oscillators 

      Ma, Chi Chiu; Zhao, Yang; Yam, Chi Yung; Chen, Guan Hua; Jiang, Qing (2005)
      We reported in a previous study that energy transfer from the orderly intertube translational oscillation to intratube vibrational modes for an isolated system of two coaxial carbon nanotubes at low temperatures ...