Unusual Phenomena in Quasi-1D Carbon Nanotubes
일시 : 2001-10-24 16:00 ~
연사 : Prof. David Tomanek(Michigan State Univ)
담당 :
장소 : 56동106호
Unusual Phenomena in Quasi-1D Carbon Nanotubes
David Tomanek
Department of Physics
Michigan State University
Owing to their extreme aspect ratio and atomic-scale perfection, nanometer-wide yet up to millimeter-long carbon nanotubes display a wide spectrum of unusual phenomena. The weak interaction between bundled or multi-walled nanotubes leads to an anisotropic interaction between these cylindrical systems an a unique orientational melting behavior [1]. In absence of incoherent scattering, nanotubes exhibit ballistic transport with a fractional quantum conductance behavior [2]. An unusually large phonon mean free path lies at the origin of an unusually large thermal conductivity of nanotubes [3]. Possible applications of nanotubes include an "atomic pump", driven by single-photon or coherent two-photon excitations, [4,5], and a "bucky-shuttle" memory based on nanocapsules [6] or fullerene peapods.
[1] Young-Kyun Kwon and David Tomanek, Orientational melting in carbon nanotube ropes, Phys. Rev. Lett. 84, 1483 (2000).
[2] Stefano Sanvito, Young-Kyun Kwon, David Tomanek, and Colin J. Lambert, Fractional quantum conductance in carbon nanotubes, Phys. Rev. Lett. 84, 1974 (2000).
[3] Savas Berber, Young-Kyun Kwon and David Tomanek
David Tomanek
Department of Physics
Michigan State University
Owing to their extreme aspect ratio and atomic-scale perfection, nanometer-wide yet up to millimeter-long carbon nanotubes display a wide spectrum of unusual phenomena. The weak interaction between bundled or multi-walled nanotubes leads to an anisotropic interaction between these cylindrical systems an a unique orientational melting behavior [1]. In absence of incoherent scattering, nanotubes exhibit ballistic transport with a fractional quantum conductance behavior [2]. An unusually large phonon mean free path lies at the origin of an unusually large thermal conductivity of nanotubes [3]. Possible applications of nanotubes include an "atomic pump", driven by single-photon or coherent two-photon excitations, [4,5], and a "bucky-shuttle" memory based on nanocapsules [6] or fullerene peapods.
[1] Young-Kyun Kwon and David Tomanek, Orientational melting in carbon nanotube ropes, Phys. Rev. Lett. 84, 1483 (2000).
[2] Stefano Sanvito, Young-Kyun Kwon, David Tomanek, and Colin J. Lambert, Fractional quantum conductance in carbon nanotubes, Phys. Rev. Lett. 84, 1974 (2000).
[3] Savas Berber, Young-Kyun Kwon and David Tomanek