Cao Jien, Wang Qian, Wang Dunwei, Dai Hongjie
Department of Chemistry and Laboratory for Advanced Materials, Stanford University, Stanford, CA 94305, USA.
Small. 2005 Jan;1(1):138-41. doi: 10.1002/smll.200400015.
Suspended single-walled carbon nanotube devices comprised of high-quality electrical contacts and two electrostatic gates per device have been prepared. Compared to nanotubes pinned on substrates, the suspended devices exhibit little hysteresis related to environmental factors and act as cleaner Fabry-Perot interferometers or single-electron transistors. The high-field saturation currents in the suspended nanotubes related to optical phonon or zone-boundary phonon scattering are significantly lower due to the lack of efficient heat sinking. The multiple-gate design may also facilitate future investigations into the electromechanical properties of nanotube quantum systems.
已制备出由高质量电接触和每个器件两个静电栅组成的悬浮单壁碳纳米管器件。与固定在衬底上的纳米管相比，悬浮器件表现出与环境因素相关的小滞后，并充当更纯净的法布里 - 珀罗干涉仪或单电子晶体管。由于缺乏有效的热沉，与光学声子或区域边界声子散射相关的悬浮纳米管中的高场饱和电流显著更低。多栅设计也可能有助于未来对纳米管量子系统机电特性的研究。
