High current density and low emission field of carbon nanotube array microbundle

2018 ◽  
Vol 112 (1) ◽  
pp. 013101 ◽  
Author(s):  
Quan Zhang ◽  
Xi-juan Wang ◽  
Peng Meng ◽  
Hong-xin Yue ◽  
Rui-ting Zheng ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Current Density ◽  
High Current Density ◽  
High Current ◽  
Nanotube Array ◽  
Carbon Nanotube Array ◽  
Low Emission

Experimental Study of Damage Mechanism of Carbon Nanotube as Nano-Component of Electronic Devices Under High Current Density

2013 ◽  
Author(s):  
Kazuhiko Sasagawa ◽  
Kazuhiro Fujisaki ◽  
Jun Unuma ◽  
Ryota Azuma
Keyword(s):  
Carbon Nanotube ◽  
Current Density ◽  
High Current Density ◽  
Electronic Devices ◽  
Damage Mechanism ◽  
Cathode Side ◽  
Testing System ◽  
High Current ◽  
Lower Oxygen ◽  
Microscopic Studies

Carbon nanotube (CNT) has a great tolerance to high current density which is a cause of electromigration (EM). Therefore, CNT is expected to use as the materials of nanoscale components of electronic devices. The damage mechanisms of CNT are regarded as the effects of oxidation by Joule heating and/or the EM by high-density electron flows. In this study, we investigated the damage mechanism of CNT structures used as nano-component of electronic devices. An EM acceleration testing system was designed using the CNT structures collected at the gap of thin-film electrodes. The EM tests were conducted under the several kinds of current density conditions and the surrounding environments. An indicator of lifetime was determined by voltage measurements during the acceleration tests and their fracture phenomena were evaluated by means of microscopic observations. As the results, the amounts of lifetime of CNT were longer in the lower oxygen concentrations than in the air condition. In the microscopic studies, it was confirmed that the local evaporation of carbon atoms due to oxidation appeared at the cathode side of the CNT structures under low current density, and the center area of CNT under high current density. Both types of damage morphologies induced by oxidation and EM were observed at the damaged CNT. The results showed the dominant damage mechanism alternated between oxidation and EM depending on current density under oxygen rich conditions.

A High-Current-Density Terahertz Electron-Optical System Based on Carbon Nanotube Cold Cathode

2020 ◽  
Vol 67 (12) ◽  
pp. 5760-5765
Author(s):  
Yunlong Gu ◽  
Xuesong Yuan ◽  
Xiaotao Xu ◽  
Matthew Cole ◽  
Qingyun Chen ◽  
...  
Keyword(s):  
Carbon Nanotube ◽  
Optical System ◽  
Current Density ◽  
High Current Density ◽  
Cold Cathode ◽  
High Current ◽  
Electron Optical System
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