NDLI: Engineering the Band Gap of Carbon Nanotubes

Content Provider	IEEE Xplore Digital Library
Author	Yilun Luo Jiangbo Zhang Ning Xi Hongzhi Chen King Wai-Chiu Lai Fung, C.K.-M. Tarn, T.J.
Copyright Year	2008
Description	Author affiliation: Dept. of Electr. & Comput. Eng., Michigan State Univ., East Lansing, MI (Yilun Luo; Jiangbo Zhang; Ning Xi; Hongzhi Chen; King Wai-Chiu Lai; Fung, C.K.-M.)
Abstract	For traditional semiconducting materials, band gap is a unique characteristic which limits the material's applications and device's performance. The capability of on-chip adjusting semiconducting material's band gap is extremely important in manufacturing electronic devices. As a one-dimensional nano material with excellent electrical properties, carbon nanotube (CNT) has a band gap determined by the circumferential quantum confinement, which depends on the tube diameter. Hence for a multi-walled carbon nanotube (MWCNT), the band gap can be on-chip adjusted by electrically removing its outer carbon shells. This paper discusses a real-time control method for controlling the MWCNT band gap adjusting process. A state space model was developed based on the quantum model for electron transport inside a nanotube. The rapid change of the system state, which represents the occurrence of electrical breakdown, can be observed using robust fault detection technique for breakdown process control. Experimental results show that the breakdown control system can effectively convert metallic MWCNTs to semiconducting MWCNTs and further adjust the band gap, which is especially important for optical detection to reduce the dark current and enhance the photo current.
Starting Page	183
Ending Page	186
File Size	421090
Page Count	4
File Format	PDF
ISBN	9781424421039
DOI	10.1109/NANO.2008.60
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2008-08-18
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Electric breakdown Photonic band gap Carbon nanotubes Current measurement Process control Electric potential Carbon
Content Type	Text
Resource Type	Article

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