The Role of Carbon Nanotube Forest Density in Thermionic Emission

被引：0

作者：

Voon, Kevin ^{[1
]}

Dridi, Kais ^{[1
]}

Chowdhury, Mokter ^{[1
]}

Chang, Mike ^{[1
]}

Nojeh, Alireza ^{[1
]}

机构：

[1] Univ British Columbia, Dept Elect & Comp Engn, Vancouver, BC, Canada

来源：

2016 29TH INTERNATIONAL VACUUM NANOELECTRONICS CONFERENCE (IVNC) | 2016年

关键词：

carbon nanotubes; heat trap; chemical vapor deposition; density; thermionic emission current;

D O I：

暂无

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Carbon nanotube (CNT) forests show great promise for efficient heat-to-electricity conversion due to their ability to confine heat to a localized area. In this work, we investigate CNT forest density as a possible factor in further optimizing their efficiency and lifetime. As a result of focused laser irradiation at different regions of the CNT forest surface, we detected a 2.5-times higher thermionic current at its corner compared to its center. In addition we observed a 30% reduction in incandescent spot area after 40 minutes and a higher 1600(circle)C temperature at the corner, compared to a 60% reduction and 1520(circle)C at the center. These findings appear to be correlated with the higher areal density at the corner compared to the center.

引用

页数：2

共 5 条

[1] Shape-engineerable and highly densely packed single-walled carbon nanotubes and their application as super-capacitor electrodes [J].

Futaba, Don N. ;

Hata, Kenji ;

Yamada, Takeo ;

Hiraoka, Tatsuki ;

Hayamizu, Yuhei ;

Kakudate, Yozo ;

Tanaike, Osamu ;

Hatori, Hiroaki ;

Yumura, Motoo ;

Iijima, Sumio .

NATURE MATERIALS, 2006, 5 (12) :987-994

[2] Rapid growth and flow-mediated nucleation of millimeter-scale aligned carbon nanotube structures from a thin-film catalyst [J].

Hart, AJ ;

Slocum, AH .

JOURNAL OF PHYSICAL CHEMISTRY B, 2006, 110 (16) :8250-8257

[3]

Yaghoobi P, 2011, 2011 24TH INTERNATIONAL VACUUM NANOELECTRONICS CONFERENCE (IVNC), P99

[4] "Heat trap": Light-induced localized heating and thermionic electron emission from carbon nanotube arrays [J].

Yaghoobi, Parham ;

Moghaddam, Mehran Vandani ;

Nojeh, Alireza .

SOLID STATE COMMUNICATIONS, 2011, 151 (17) :1105-1108

[5] Influence of ethylene and hydrogen flow rates on the wall number, crystallinity, and length of millimeter-long carbon nanotube array [J].

Zhang, Hao ;

Cao, Gaoping ;

Wang, Zhiyong ;

Yang, Yusheng ;

Shi, Zujin ;

Gu, Zhennan .

JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (33) :12706-12709

← 1 →