Constant-Power Operation of Functionalized Carbon Nanotube Sensors for Alcohol Vapor Detection

Mengxing Ouyang; Mandy L.Y. Sin; Brittle K.H. Tsoi; Gary C.T. Chow; Gary M.K. Wong; Wen J. Li; Hilip H.W. Leone; Ka Wai Wong

doi:10.1109/NEMS.2008.4484436

Constant-Power Operation of Functionalized Carbon Nanotube Sensors for Alcohol Vapor Detection

Mengxing Ouyang, Mandy L.Y. Sin, Brittle K.H. Tsoi, Gary C.T. Chow, Gary M.K. Wong, Wen J. Li^*, Hilip H.W. Leone, Ka Wai Wong

^*Corresponding author for this work

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

6 Citations (Scopus)

Abstract

A constant-power control circuit has been built successfully for the digital operation of CNT-based alcohol vapor sensors. The sensors, which are based on bundles of chemically functionalized multi-walled carbon nanotubes (f-CNTs), have been proven to be sensitive towards alcohol molecules. The resistance of the sensors increases upon exposure to alcohol vapors. The constant-power configuration is developed to avoid the self-heating effect, which is a significant factor in affecting the sensor performance. On the other hand, we also utilized the selfheating effect to clean up the alcohol molecules on the f-CNTs between measurements. The comparison experiments between constant-power and constant-current configurations were conducted. The results demonstrated larger response under constant-power mode, especially when operating power was low or alcohol concentration was relatively high. The responsivity and the sensitivity of alcohol vapor sensors under different mode and operating powers are also discussed. © 2008 IEEE.

Original language	English
Title of host publication	3rd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS
Pages	747-752
DOIs	https://doi.org/10.1109/NEMS.2008.4484436
Publication status	Published - 2008
Externally published	Yes
Event	3rd IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS 2008) - Sanya, China Duration: 6 Jan 2008 → 9 Jan 2008

Conference

Conference	3rd IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS 2008)
Place	China
City	Sanya
Period	6/01/08 → 9/01/08

Research Keywords

Alcohol vapor detection
And CNT sensors
Chemical sensors
CNT functionalization
Constant-power configuration

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Ouyang, M., Sin, M. L. Y., Tsoi, B. K. H., Chow, G. C. T., Wong, G. M. K., Li, W. J., Leone, H. H. W., & Wong, K. W. (2008). Constant-Power Operation of Functionalized Carbon Nanotube Sensors for Alcohol Vapor Detection. In 3rd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS (pp. 747-752). Article 4484436 https://doi.org/10.1109/NEMS.2008.4484436

@inproceedings{5b54e9a0476b48f096c87115045260c2,

title = "Constant-Power Operation of Functionalized Carbon Nanotube Sensors for Alcohol Vapor Detection",

abstract = "A constant-power control circuit has been built successfully for the digital operation of CNT-based alcohol vapor sensors. The sensors, which are based on bundles of chemically functionalized multi-walled carbon nanotubes (f-CNTs), have been proven to be sensitive towards alcohol molecules. The resistance of the sensors increases upon exposure to alcohol vapors. The constant-power configuration is developed to avoid the self-heating effect, which is a significant factor in affecting the sensor performance. On the other hand, we also utilized the selfheating effect to clean up the alcohol molecules on the f-CNTs between measurements. The comparison experiments between constant-power and constant-current configurations were conducted. The results demonstrated larger response under constant-power mode, especially when operating power was low or alcohol concentration was relatively high. The responsivity and the sensitivity of alcohol vapor sensors under different mode and operating powers are also discussed. {\textcopyright} 2008 IEEE.",

keywords = "Alcohol vapor detection, And CNT sensors, Chemical sensors, CNT functionalization, Constant-power configuration",

author = "Mengxing Ouyang and Sin, {Mandy L.Y.} and Tsoi, {Brittle K.H.} and Chow, {Gary C.T.} and Wong, {Gary M.K.} and Li, {Wen J.} and Leone, {Hilip H.W.} and Wong, {Ka Wai}",

year = "2008",

doi = "10.1109/NEMS.2008.4484436",

language = "English",

isbn = "9781424419081",

pages = "747--752",

booktitle = "3rd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS",

note = "3rd IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS 2008) ; Conference date: 06-01-2008 Through 09-01-2008",

}

Ouyang, M, Sin, MLY, Tsoi, BKH, Chow, GCT, Wong, GMK, Li, WJ, Leone, HHW & Wong, KW 2008, Constant-Power Operation of Functionalized Carbon Nanotube Sensors for Alcohol Vapor Detection. in 3rd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS., 4484436, pp. 747-752, 3rd IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS 2008), Sanya, China, 6/01/08. https://doi.org/10.1109/NEMS.2008.4484436

Constant-Power Operation of Functionalized Carbon Nanotube Sensors for Alcohol Vapor Detection. / Ouyang, Mengxing; Sin, Mandy L.Y.; Tsoi, Brittle K.H. et al.
3rd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS. 2008. p. 747-752 4484436.

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

TY - GEN

T1 - Constant-Power Operation of Functionalized Carbon Nanotube Sensors for Alcohol Vapor Detection

AU - Ouyang, Mengxing

AU - Sin, Mandy L.Y.

AU - Tsoi, Brittle K.H.

AU - Chow, Gary C.T.

AU - Wong, Gary M.K.

AU - Li, Wen J.

AU - Leone, Hilip H.W.

AU - Wong, Ka Wai

PY - 2008

Y1 - 2008

N2 - A constant-power control circuit has been built successfully for the digital operation of CNT-based alcohol vapor sensors. The sensors, which are based on bundles of chemically functionalized multi-walled carbon nanotubes (f-CNTs), have been proven to be sensitive towards alcohol molecules. The resistance of the sensors increases upon exposure to alcohol vapors. The constant-power configuration is developed to avoid the self-heating effect, which is a significant factor in affecting the sensor performance. On the other hand, we also utilized the selfheating effect to clean up the alcohol molecules on the f-CNTs between measurements. The comparison experiments between constant-power and constant-current configurations were conducted. The results demonstrated larger response under constant-power mode, especially when operating power was low or alcohol concentration was relatively high. The responsivity and the sensitivity of alcohol vapor sensors under different mode and operating powers are also discussed. © 2008 IEEE.

AB - A constant-power control circuit has been built successfully for the digital operation of CNT-based alcohol vapor sensors. The sensors, which are based on bundles of chemically functionalized multi-walled carbon nanotubes (f-CNTs), have been proven to be sensitive towards alcohol molecules. The resistance of the sensors increases upon exposure to alcohol vapors. The constant-power configuration is developed to avoid the self-heating effect, which is a significant factor in affecting the sensor performance. On the other hand, we also utilized the selfheating effect to clean up the alcohol molecules on the f-CNTs between measurements. The comparison experiments between constant-power and constant-current configurations were conducted. The results demonstrated larger response under constant-power mode, especially when operating power was low or alcohol concentration was relatively high. The responsivity and the sensitivity of alcohol vapor sensors under different mode and operating powers are also discussed. © 2008 IEEE.

KW - Alcohol vapor detection

KW - And CNT sensors

KW - Chemical sensors

KW - CNT functionalization

KW - Constant-power configuration

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U2 - 10.1109/NEMS.2008.4484436

DO - 10.1109/NEMS.2008.4484436

M3 - RGC 32 - Refereed conference paper (with host publication)

SN - 9781424419081

SP - 747

EP - 752

BT - 3rd IEEE International Conference on Nano/Micro Engineered and Molecular Systems, NEMS

T2 - 3rd IEEE International Conference on Nano/Micro Engineered and Molecular Systems (NEMS 2008)

Y2 - 6 January 2008 through 9 January 2008

ER -

Constant-Power Operation of Functionalized Carbon Nanotube Sensors for Alcohol Vapor Detection

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