Highly sensitive NO2 sensor array based on undecorated single-walled carbon nanotube monolayer junctions

Highly sensitive NO2 sensor array based on undecorated single-walled carbon nanotube monolayer junctions

Using the surface-programmed assembly technique, we have fabricated a uniform array of NO2 sensors based on undecorated single-walled carbon nanotube (SWNT) monolayer junctions. The sensitivity of the SWNT monolayer network-based sensors to NO2 gas was investigated at room temperature. We have found...

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Veröffentlicht in:Applied physics letters 2008-09, Vol.93 (11)
Hauptverfasser: Maeng, Sunglyul, Moon, Seungeon, Kim, Sanghyeob, Lee, Hong-Yeol, Park, So-Jeong, Kwak, Jun-Hyuk, Park, Kang-Ho, Park, Jonghyurk, Choi, Youngjin, Udrea, Florin, Milne, William I., Lee, Byung Yang, Lee, Minbaek, Hong, Seunghun
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container_issue 11
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container_title Applied physics letters
container_volume 93
creator Maeng, Sunglyul
Moon, Seungeon
Kim, Sanghyeob
Lee, Hong-Yeol
Park, So-Jeong
Kwak, Jun-Hyuk
Park, Kang-Ho
Park, Jonghyurk
Choi, Youngjin
Udrea, Florin
Milne, William I.
Lee, Byung Yang
Lee, Minbaek
Hong, Seunghun
description Using the surface-programmed assembly technique, we have fabricated a uniform array of NO2 sensors based on undecorated single-walled carbon nanotube (SWNT) monolayer junctions. The sensitivity of the SWNT monolayer network-based sensors to NO2 gas was investigated at room temperature. We have found that the response of the gas sensors is inversely proportional to the initial conductance of the SWNT network. This behavior is different from conventional gas sensors based on uniform films, and it may be critical for the calibration of sensors in practical applications. An analytical model based on standard percolation theory is proposed to explain this behavior.
doi_str_mv 10.1063/1.2982428
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title Highly sensitive NO2 sensor array based on undecorated single-walled carbon nanotube monolayer junctions
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