Abstract
Based on the density of states obtained by theoretical calculation, electron transport mechanism of carbon nanotube is studied for field emission applications. This letter focuses on how Stone-Wales defect and vacancy-related defect affect carbon nanotube’s emission property. The influence is presented in the form of electron traces. The result shows that Stone-Wales defects reduce carbon nanotube’s emission current, while vacancy-related defects give rise to it. This phenomenon can be expressed by adding a defective effect coefficient kd into the classical Fowler-Nordheim formula. Detailed relationship between kd and defect type and number is also presented.
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