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  • Photoelectrochemical sensing of glucose based on quantum dot and enzyme nanocomposites

    Author(s)
    Zheng, Min
    Cui, Yan
    Li, Xinyu
    Liu, Shaoqin
    Tang, Zhiyong
    Griffith University Author(s)
    Tang, Zhiyong
    Year published
    2011
    Metadata
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    Abstract
    A simple procedure for constructing the photoelectrochemical biosensor based on TiO2/CdSe@CdS QD nanocomposite modified electrode was developed. The TiO2/CdSe@CdS QD nanocomposite modified electrode was obtained by alternately depositing water-soluble CdSe@CdS QD and a mixture of [cobalt(o-phen)3]2+/3+ and poly(ethyleneimine) (PEI) over mesoscopic TiO2 films. The obtained TiO2/CdSe@CdS QD nanocomposite modified electrode exhibits much higher and stable photocurrent intensity than that of the photoelectrochemical biosensors reported so far. After the TiO2/CdSe@CdS QD nanocomposite modified electrode was coated with glucose ...
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    A simple procedure for constructing the photoelectrochemical biosensor based on TiO2/CdSe@CdS QD nanocomposite modified electrode was developed. The TiO2/CdSe@CdS QD nanocomposite modified electrode was obtained by alternately depositing water-soluble CdSe@CdS QD and a mixture of [cobalt(o-phen)3]2+/3+ and poly(ethyleneimine) (PEI) over mesoscopic TiO2 films. The obtained TiO2/CdSe@CdS QD nanocomposite modified electrode exhibits much higher and stable photocurrent intensity than that of the photoelectrochemical biosensors reported so far. After the TiO2/CdSe@CdS QD nanocomposite modified electrode was coated with glucose oxidase, the photocurrent intensity was enhanced towards the addition of glucose. Thus, a photoelectrochemical biosensor for the detection of glucose was developed by monitoring the changes in the photocurrent intensity. Moreover, the proposed biosensor possessed good reproducibility and storage stability. Combining TiO2/CdSe@CdS nanocomposite and other biomolecules could be extended readily for sensing other biorecognition events.
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    Journal Title
    Journal of Electroanalytical Chemistry
    Volume
    656
    Issue
    1-2
    DOI
    https://doi.org/10.1016/j.jelechem.2010.11.036
    Subject
    Analytical chemistry
    Analytical chemistry not elsewhere classified
    Macromolecular and materials chemistry
    Theoretical and computational chemistry
    Publication URI
    http://hdl.handle.net/10072/172945
    Collection
    • Journal articles

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