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Title: Ultra-sensitive and wide-dynamic-range sensors based on dense arrays of carbon nanotube tips
Authors: Sun, Gengzhi
Huang, Yinxi
Zheng, Lianxi
Zhan, Zhaoyao
Zhang, Yani
Pang, John Hock Lye
Wu, Tom
Chen, Peng
Keywords: DRNTU::Engineering::Electrical and electronic engineering::Nanoelectronics
Issue Date: 2011
Source: 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.
Series/Report no.: Nanoscale
Abstract: 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.
DOI: 10.1039/c1nr10899a
Rights: © 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:].
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:MAE Journal Articles

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