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Issue 30, 2011
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Electrochemical glutamate biosensing with nanocube and nanosphere augmented single-walled carbon nanotube networks: a comparative study

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Abstract

We describe two hybrid nanomaterial biosensor platforms, based on networks of single-walled carbon nanotubes (SWCNTs) enhanced with Pd nanocubes and Pt nanospheres and grown in situ from a porous anodic alumina (PAA) template. These nanocube and nanosphere SWCNT networks are converted into glutamate biosensors by immobilizing the enzyme glutamate oxidase (cross-linked with gluteraldehyde) onto the electrode surface. The Pt nanosphere/SWCNT biosensor outperformed the Pd nanocube/SWCNT biosensor and previously reported similar nanomaterial-based biosensors by amperometrically monitoring glutamate concentrations with a wide linear sensing range (50 nM to 1.6 mM) and a small detection limit (4.6 nM, 3σ). These results combined with the biosensor fabrication scheme (in situgrowth of SWCNTs, electrodeposition of metal nanoparticles, and facile enzyme immobilization protocol) create a biosensor that can potentially be scaled for integration into a wide range of applications including the treatment of neurological disorders.

Graphical abstract: Electrochemical glutamate biosensing with nanocube and nanosphere augmented single-walled carbon nanotube networks: a comparative study

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Publication details

The article was received on 12 Apr 2011, accepted on 06 Jun 2011 and first published on 24 Jun 2011


Article type: Paper
DOI: 10.1039/C1JM11561H
Citation: J. Mater. Chem., 2011,21, 11224-11231
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    Electrochemical glutamate biosensing with nanocube and nanosphere augmented single-walled carbon nanotube networks: a comparative study

    J. C. Claussen, M. S. Artiles, E. S. McLamore, S. Mohanty, J. Shi, J. L. Rickus, T. S. Fisher and D. M. Porterfield, J. Mater. Chem., 2011, 21, 11224
    DOI: 10.1039/C1JM11561H

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