Detection of a CO and NH3 gas mixture using carboxylic acid-functionalized single-walled carbon nanotubes

Ki Young Dong; Jinnil Choi; Yang Doo Lee; Byung Hyun Kang; Youn Yeol Yu; Hyang Hee Choi; Byeong Kwon Ju

doi:10.1186/1556-276X-8-12

Detection of a CO and NH₃ gas mixture using carboxylic acid-functionalized single-walled carbon nanotubes

Ki Young Dong, Jinnil Choi, Yang Doo Lee, Byung Hyun Kang, Youn Yeol Yu, Hyang Hee Choi, Byeong Kwon Ju

School of Electrical Engineering

Research output: Contribution to journal › Article › peer-review

59 Citations (Scopus)

Abstract

Carbon nanotubes (CNT) are extremely sensitive to environmental gases. However, detection of mixture gas is still a challenge. Here, we report that 10 ppm of carbon monoxide (CO) and ammonia (NH₃) can be electrically detected using a carboxylic acid-functionalized single-walled carbon nanotubes (C-SWCNT). CO and NH3 gases were mixed carefully with the same concentrations of 10 ppm. Our sensor showed faster response to the CO gas than the NH₃ gas. The sensing properties and effect of carboxylic acid group were demonstrated, and C-SWCNT sensors with good repeatability and fast responses over a range of concentrations may be used as a simple and effective detection method of CO and NH₃ mixture gas.

Original language	English
Article number	12
Pages (from-to)	1-6
Number of pages	6
Journal	Nanoscale Research Letters
Volume	8
Issue number	1
DOIs	https://doi.org/10.1186/1556-276X-8-12
Publication status	Published - 2013

Keywords

Carboxylic acid functionalized
Gas sensors
Mixture gas
Single-walled carbon nanotubes

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

Access to Document

10.1186/1556-276X-8-12

Cite this

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title = "Detection of a CO and NH3 gas mixture using carboxylic acid-functionalized single-walled carbon nanotubes",

abstract = "Carbon nanotubes (CNT) are extremely sensitive to environmental gases. However, detection of mixture gas is still a challenge. Here, we report that 10 ppm of carbon monoxide (CO) and ammonia (NH3) can be electrically detected using a carboxylic acid-functionalized single-walled carbon nanotubes (C-SWCNT). CO and NH3 gases were mixed carefully with the same concentrations of 10 ppm. Our sensor showed faster response to the CO gas than the NH3 gas. The sensing properties and effect of carboxylic acid group were demonstrated, and C-SWCNT sensors with good repeatability and fast responses over a range of concentrations may be used as a simple and effective detection method of CO and NH3 mixture gas.",

keywords = "Carboxylic acid functionalized, Gas sensors, Mixture gas, Single-walled carbon nanotubes",

author = "Dong, {Ki Young} and Jinnil Choi and Lee, {Yang Doo} and Kang, {Byung Hyun} and Yu, {Youn Yeol} and Choi, {Hyang Hee} and Ju, {Byeong Kwon}",

note = "Funding Information: This work was supported by World Class University (WCU, R32-2009-000-10082-0) Project of the Ministry of Education, Science and Technology (Korea Science and Engineering Foundation) and partially supported by the Industrial Core Technology Development Program funded by the Ministry of Knowledge Economy (grant no. 10037394). This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (no. 2012R1A1A3013893). The authors thank the staff of Korea Basic Science Institute (KBSI) for the technical assistance.",

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AU - Dong, Ki Young

AU - Choi, Jinnil

AU - Lee, Yang Doo

AU - Kang, Byung Hyun

AU - Yu, Youn Yeol

AU - Choi, Hyang Hee

AU - Ju, Byeong Kwon

N1 - Funding Information: This work was supported by World Class University (WCU, R32-2009-000-10082-0) Project of the Ministry of Education, Science and Technology (Korea Science and Engineering Foundation) and partially supported by the Industrial Core Technology Development Program funded by the Ministry of Knowledge Economy (grant no. 10037394). This research was supported by the Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (no. 2012R1A1A3013893). The authors thank the staff of Korea Basic Science Institute (KBSI) for the technical assistance.

PY - 2013

Y1 - 2013

N2 - Carbon nanotubes (CNT) are extremely sensitive to environmental gases. However, detection of mixture gas is still a challenge. Here, we report that 10 ppm of carbon monoxide (CO) and ammonia (NH3) can be electrically detected using a carboxylic acid-functionalized single-walled carbon nanotubes (C-SWCNT). CO and NH3 gases were mixed carefully with the same concentrations of 10 ppm. Our sensor showed faster response to the CO gas than the NH3 gas. The sensing properties and effect of carboxylic acid group were demonstrated, and C-SWCNT sensors with good repeatability and fast responses over a range of concentrations may be used as a simple and effective detection method of CO and NH3 mixture gas.

AB - Carbon nanotubes (CNT) are extremely sensitive to environmental gases. However, detection of mixture gas is still a challenge. Here, we report that 10 ppm of carbon monoxide (CO) and ammonia (NH3) can be electrically detected using a carboxylic acid-functionalized single-walled carbon nanotubes (C-SWCNT). CO and NH3 gases were mixed carefully with the same concentrations of 10 ppm. Our sensor showed faster response to the CO gas than the NH3 gas. The sensing properties and effect of carboxylic acid group were demonstrated, and C-SWCNT sensors with good repeatability and fast responses over a range of concentrations may be used as a simple and effective detection method of CO and NH3 mixture gas.

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