Zhu, Z and Garcia-Gancedo, L and Flewitt, AJ and Moussy, F and Li, Y and Milne, WI (2012) Design of carbon nanotube fiber microelectrode for glucose biosensing. Journal of Chemical Technology and Biotechnology, 87. pp. 256-262. ISSN 0268-2575Full text not available from this repository.
BACKGROUND: Carbon nanotube (CNT) fiber directly spun from an aerogel has a unique, well-aligned nanostructure (nano-pore and nano-brush), and thus provides high electro-catalytic activity and strong interaction with glucose oxidase enzyme. It shows great potential as a microelectrode for electrochemical biosensors. RESULTS: Cyclic voltammogram results indicate that post-synthesis treatments have great influence on the electrocatalytic activity of CNT fibers. Raman spectroscopy and electrical conductivity tests suggest that fibers annealed at 250 °C remove most of the impurities without damaging the graphite-like structure. This leads to a nano-porous morphology on the surface and the highest conductivity value (1.1 × 10 5 S m -1). Two CNT fiber microelectrode designs were applied to enhance their electron transfer behaviour, and it was found that a design using a 30 nm gold coating is able to linearly cover human physiological glucose level between 2 and 30 mmol L -1. The design also leads to a low detection limit of 25 μmol L -1. CONCLUSIONS: The high performance of CNT fibers not only offers exceptional mechanical and electrical properties, but also provides a large surface area and electron transfer pathway. They consequently make excellent bioactive microelectrodes for glucose biosensing, especially for potential use in implantable devices. © 2011 Society of Chemical Industry.
|Uncontrolled Keywords:||Carbon nanotube fiber Electrochemical detection Glucose biosensor Sensitivity|
|Depositing User:||Cron job|
|Date Deposited:||04 Feb 2015 22:06|
|Last Modified:||31 May 2015 11:23|