Characterizing carbon-nanotube devices for an integrated sensor system
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2007.
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| Format: | Thesis |
| Language: | eng |
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Massachusetts Institute of Technology
2008
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| Online Access: | http://hdl.handle.net/1721.1/40322 |
| _version_ | 1826208213186379776 |
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| author | Lee, Kyeong-Jae |
| author2 | Jing Kong. |
| author_facet | Jing Kong. Lee, Kyeong-Jae |
| author_sort | Lee, Kyeong-Jae |
| collection | MIT |
| description | Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2007. |
| first_indexed | 2024-09-23T14:01:58Z |
| format | Thesis |
| id | mit-1721.1/40322 |
| institution | Massachusetts Institute of Technology |
| language | eng |
| last_indexed | 2024-09-23T14:01:58Z |
| publishDate | 2008 |
| publisher | Massachusetts Institute of Technology |
| record_format | dspace |
| spelling | mit-1721.1/403222019-04-11T14:23:24Z Characterizing carbon-nanotube devices for an integrated sensor system Characterizing CNT devices for an integrated sensor system Lee, Kyeong-Jae Jing Kong. Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science. Massachusetts Institute of Technology. Dept. of Electrical Engineering and Computer Science. Electrical Engineering and Computer Science. Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2007. This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections. Includes bibliographical references (p. 51-56). While carbon nanotubes (CNT) offer promise for future nano-electronic applications, reliably controlling CNT growth has been a big challenge. As-grown devices can have a number of different nanotubes, which can be either metallic or semiconducting and also vary in diameter. These factors affect the electrical properties, which are important in particular for chemical sensing applications. In this thesis, arrays of CNT field-effect transistors (FET) are fabricated and the resistance variation of as-grown devices is characterized. Each CNT array is exposed under varying concentrations of NO2 as the conductance is monitored. The effects of gas adsorption on the metal contact and the CNT channel are treated separately in this work. A charge transfer and site-binding model is applied to understand the CNT-NO2 interaction, and a Schottky-barrier modulation effect is used to describe the metal-NO2 interaction. This model is applied to both the transient and steady-state response of the normalized conductance change for various devices. Devices of a different design are also fabricated, either by selectively exposing certain regions of a device to NO2 or using a different metal contact. The response of such devices show the importance of gas molecules interacting with both the metal and CNT. Finally, a prototype CMOS-CNT sensor system is demonstrated. This hybrid system demonstrates the need for variation-toleration circuit interfaces and highlights some outstanding issues regarding integration for full scale CNT circuit applications. by Kyeong-Jae Lee. S.M. 2008-02-27T20:38:29Z 2008-02-27T20:38:29Z 2007 2007 Thesis http://hdl.handle.net/1721.1/40322 191913833 eng M.I.T. theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. See provided URL for inquiries about permission. http://dspace.mit.edu/handle/1721.1/7582 56 p. application/pdf Massachusetts Institute of Technology |
| spellingShingle | Electrical Engineering and Computer Science. Lee, Kyeong-Jae Characterizing carbon-nanotube devices for an integrated sensor system |
| title | Characterizing carbon-nanotube devices for an integrated sensor system |
| title_full | Characterizing carbon-nanotube devices for an integrated sensor system |
| title_fullStr | Characterizing carbon-nanotube devices for an integrated sensor system |
| title_full_unstemmed | Characterizing carbon-nanotube devices for an integrated sensor system |
| title_short | Characterizing carbon-nanotube devices for an integrated sensor system |
| title_sort | characterizing carbon nanotube devices for an integrated sensor system |
| topic | Electrical Engineering and Computer Science. |
| url | http://hdl.handle.net/1721.1/40322 |
| work_keys_str_mv | AT leekyeongjae characterizingcarbonnanotubedevicesforanintegratedsensorsystem AT leekyeongjae characterizingcntdevicesforanintegratedsensorsystem |