|
Title:
|
Ultra-sensitive and wide-dynamic-range sensors based on dense arrays of carbon nanotube tips.
|
|
Author:
|
Sun, Gengzhi.; Huang, Yinxi.; Zheng, Lianxi.; Zhan, Zhaoyao.; Zhang, Yani.; Pang, John H. L.; Wu, Tom.; Chen, Peng.
|
|
Copyright year:
|
2011 |
|
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. |
|
Subject:
|
DRNTU::Engineering::Electrical and electronic engineering::Nanoelectronics. |
|
Type:
|
Journal Article |
|
Series/ Journal Title:
|
Nanoscale |
|
School:
|
School of Mechanical and Aerospace Engineering |
|
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: http://dx.doi.org/10.1039/c1nr10899a]. |
|
Version:
|
Accepted version |
