The Influence of Carbon Nanotube's Conductivity and Diameter on Its Thermionic Electron Emission,Physica Status Solidi (A) - Applications and Materials Science

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The Influence of Carbon Nanotube's Conductivity and Diameter on Its Thermionic Electron Emission
Physica Status Solidi (A) - Applications and Materials Science Pub Date : 2020-06-04 , DOI: 10.1002/pssa.202000069
Xinhe Yang ₁ , Xinhe Wang ₂ , Peng Liu ₁ , Jiangtao Wang ₁ , Lina Zhang ₁ , Xiang Jin ₁ , Zebin Liu ₁ , Qunqing Li ₁ , Shoushan Fan ₁ , Kaili Jiang ₁

Affiliation

High‐temperature thermionic electron emission from different types of individual suspended carbon nanotubes (CNTs) in a homemade chip is studied. When collecting emission electrons with an external electrode, it is found that the collecting electric field influence the transport current in the CNTs, and the thermionic electron emission deviated from the traditional thermionic electron emission model and cannot reach “saturation”. This effect is analyzed for single‐walled, double‐walled, multiwalled‐CNT and CNT bundles. It is found that this effect show correlation with the conductivity and diameter of the CNT. With the increase in metallicity, the influence of collecting electrode is gradually weakened. Also, the effect shows a negative correlation with the diameter of CNTs. An equation is proposed to describe the measured thermionic emission curve and determine the “effective” work function of the CNT.

中文翻译：

碳纳米管的电导率和直径对其热电子发射的影响

研究了自制芯片中不同类型的单个悬浮碳纳米管（CNT）的高温热电子发射。发现当用外部电极收集发射电子时，发现收集电场会影响CNT中的传输电流，并且热电子电子发射会偏离传统的热电子发射模型，并且无法达到“饱和”状态。分析了单壁，双壁，多壁CNT和CNT束的这种影响。发现该效应与CNT的电导率和直径相关。随着金属性的增加，集电极的影响逐渐减弱。而且，该效果显示出与CNT的直径负相关。

更新日期：2020-08-08

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