Field emission characteristics of single-walled carbon nanotubes were studied by using a simple method in a field emission microscope.The nanotube emission gun works effectively at the room temperature under a thresho...Field emission characteristics of single-walled carbon nanotubes were studied by using a simple method in a field emission microscope.The nanotube emission gun works effectively at the room temperature under a threshold field as low as 3.9mV/μm.A typical I-V relationship of field emission was obtained with a high current density.The observed stable bright spots on the fluorescent screen originate from an ensemble emission from micro-ropes of the single-walled carbon nanotubes.展开更多
基金Supported by the National Natural Science Foundation of China under Grant No.59672013the 3 rd“Zhou Peiyuan Special Foundation for Mathematics and Physics”。
文摘Field emission characteristics of single-walled carbon nanotubes were studied by using a simple method in a field emission microscope.The nanotube emission gun works effectively at the room temperature under a threshold field as low as 3.9mV/μm.A typical I-V relationship of field emission was obtained with a high current density.The observed stable bright spots on the fluorescent screen originate from an ensemble emission from micro-ropes of the single-walled carbon nanotubes.