Ultra-sensitive and wide-dynamic-range sensors based on dense arrays of carbon nanotube tips

Electrochemical electrodes based on dense and vertically aligned arrays of multi-walled carbon nanotubes (MWCNTs) were produced. The open tips of individual hollow nanotubes are exposed as active sites while the entangled nanotube stems encapsulated in epoxy collectively provide multip...

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Main Authors: Sun, Gengzhi, Huang, Yinxi, Zheng, Lianxi, Zhan, Zhaoyao, Zhang, Yani, Pang, John Hock Lye, Wu, Tom, Chen, Peng
Other Authors: School of Mechanical and Aerospace Engineering
Format: Article
Language:English
Published: 2012
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Online Access:https://hdl.handle.net/10356/94378
http://hdl.handle.net/10220/7587
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-943782023-03-04T17:18:25Z Ultra-sensitive and wide-dynamic-range sensors based on dense arrays of carbon nanotube tips Sun, Gengzhi Huang, Yinxi Zheng, Lianxi Zhan, Zhaoyao Zhang, Yani Pang, John Hock Lye Wu, Tom Chen, Peng School of Mechanical and Aerospace Engineering DRNTU::Engineering::Electrical and electronic engineering::Nanoelectronics Electrochemical electrodes based on dense and vertically aligned arrays of multi-walled carbon nanotubes (MWCNTs) were produced. The open tips of individual hollow nanotubes are exposed as active sites while the entangled nanotube stems encapsulated in epoxy collectively provide multiplexed and highly conductive pathways for charge transport. This unique structure together with the extraordinary electrical and electrochemical properties of MWCNTs offers a high signal-to-noise ratio (thus high sensitivity) and a large detection range, compared with other carbon-based electrodes. Our electrodes can detect K3FeCN6 and dopamine at concentrations as low as 5 nM and 10 nM, respectively, and are responsive in a large dynamic range that spans almost 5 orders of magnitude. Accepted version 2012-03-01T08:39:41Z 2019-12-06T18:55:12Z 2012-03-01T08:39:41Z 2019-12-06T18:55:12Z 2011 2011 Journal Article Sun, G., Huang, Y., Zheng, L., Zhan, Z., Zhang, Y., Pang, J. H. L., et al. (2011). Ultra-sensitive and wide-dynamic-range sensors based on dense arrays of carbon nanotube tips. Nanoscale, 3, 4854-4858. https://hdl.handle.net/10356/94378 http://hdl.handle.net/10220/7587 10.1039/c1nr10899a 163169 en Nanoscale © 2011 Royal Society of Chemistry. This is the author created version of a work that has been peer reviewed and accepted for publication by Nanoscale, Royal Society of Chemistry. It incorporates referee’s comments but changes resulting from the publishing process, such as copyediting, structural formatting, may not be reflected in this document. The published version is available at: [DOI: http://dx.doi.org/10.1039/c1nr10899a]. 5 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Electrical and electronic engineering::Nanoelectronics
spellingShingle DRNTU::Engineering::Electrical and electronic engineering::Nanoelectronics
Sun, Gengzhi
Huang, Yinxi
Zheng, Lianxi
Zhan, Zhaoyao
Zhang, Yani
Pang, John Hock Lye
Wu, Tom
Chen, Peng
Ultra-sensitive and wide-dynamic-range sensors based on dense arrays of carbon nanotube tips
description Electrochemical electrodes based on dense and vertically aligned arrays of multi-walled carbon nanotubes (MWCNTs) were produced. The open tips of individual hollow nanotubes are exposed as active sites while the entangled nanotube stems encapsulated in epoxy collectively provide multiplexed and highly conductive pathways for charge transport. This unique structure together with the extraordinary electrical and electrochemical properties of MWCNTs offers a high signal-to-noise ratio (thus high sensitivity) and a large detection range, compared with other carbon-based electrodes. Our electrodes can detect K3FeCN6 and dopamine at concentrations as low as 5 nM and 10 nM, respectively, and are responsive in a large dynamic range that spans almost 5 orders of magnitude.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Sun, Gengzhi
Huang, Yinxi
Zheng, Lianxi
Zhan, Zhaoyao
Zhang, Yani
Pang, John Hock Lye
Wu, Tom
Chen, Peng
format Article
author Sun, Gengzhi
Huang, Yinxi
Zheng, Lianxi
Zhan, Zhaoyao
Zhang, Yani
Pang, John Hock Lye
Wu, Tom
Chen, Peng
author_sort Sun, Gengzhi
title Ultra-sensitive and wide-dynamic-range sensors based on dense arrays of carbon nanotube tips
title_short Ultra-sensitive and wide-dynamic-range sensors based on dense arrays of carbon nanotube tips
title_full Ultra-sensitive and wide-dynamic-range sensors based on dense arrays of carbon nanotube tips
title_fullStr Ultra-sensitive and wide-dynamic-range sensors based on dense arrays of carbon nanotube tips
title_full_unstemmed Ultra-sensitive and wide-dynamic-range sensors based on dense arrays of carbon nanotube tips
title_sort ultra-sensitive and wide-dynamic-range sensors based on dense arrays of carbon nanotube tips
publishDate 2012
url https://hdl.handle.net/10356/94378
http://hdl.handle.net/10220/7587
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