A Simple Method to Make Field Emitter Using Ropes of Single-Walled Carbon Nanotubes
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DING Yu,
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HANG Qing-ling,
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ZHANG Hong-zhou,
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FENG Sun-qi,
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BAI Zhi-gang,
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YU Da-peng,
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ZHANG Zhao-xiang,
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XUE Zeng-quan,
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SHI Zu-jin,
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LIAN Yong-fu,
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GU Zhen-nan
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Abstract
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.
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