Quantum dots based platform for application to fish freshness biosensor

Laser ablated tin oxide quantum dots (SnO2 QDs ∼1–5nm) uniformly dispersed in a colloidal solution have been electrophoretically deposited onto indium–tin-oxide (ITO) glass for immobilization of xanthine oxidase (XOx) for fabrication of fish freshness biosensor. The results of electrochemical respon...

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Bibliographic Details
Published in:Sensors and actuators. B, Chemical Chemical, 2013-02, Vol.177, p.627-633
Main Authors: Kamil Reza, K., Singh, Manish Kumar, Yadav, Surendra K., Singh, Jay, Agrawal, Ved Varun, Malhotra, B.D.
Format: Article
Language:English
Subjects:
biosensors
Electrochemical sensing
electrochemistry
Electrophoretic deposition
fish
Fish freshness
freshness
glass
quantum dots
SnO2 QDs
tin
Xanthine oxidase
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Summary:Laser ablated tin oxide quantum dots (SnO2 QDs ∼1–5nm) uniformly dispersed in a colloidal solution have been electrophoretically deposited onto indium–tin-oxide (ITO) glass for immobilization of xanthine oxidase (XOx) for fabrication of fish freshness biosensor. The results of electrochemical response studies conducted on XOx/SnO2 QDs/ITO bio-electrode reveal higher sensitivity (0.5148μA/μMcm2), lower Km value (0.022μM), faster response time (10s), and wide linear range of 1–400μM with regression co-efficient as 0.999, higher charge transfer rate constant 1.63s−1.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2012.11.059