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    A novel recyclable magnetic nanostructure for highly sensitive, selective and reversible detection of zinc ions in aqueous solutions

    241502.pdf (2.361Mb)
    Access Status
    Open access
    Authors
    Pourfallah, Ghazaleh
    Lou, Xia
    Date
    2016
    Type
    Journal Article
    
    Metadata
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    Citation
    Pourfallah, G. and Lou, X. 2016. A novel recyclable magnetic nanostructure for highly sensitive, selective and reversible detection of zinc ions in aqueous solutions. Sensors and Actuators B. 233: pp. 379-387.
    Source Title
    Sensors and Actuators B
    DOI
    10.1016/j.snb.2016.04.087
    ISSN
    0925-4005
    School
    Department of Chemical Engineering
    URI
    http://hdl.handle.net/20.500.11937/46129
    Collection
    • Curtin Research Publications
    Abstract

    The synthesis and characterisation of a novel dansylated magnetic nanostructure, namely Fe3O4@SiO2-PEG-DnS, is reported here. Investigations of its fluorescent properties showed that the presence of the PEG moiety significantly enhanced the fluorescent intensity of the nanostructure when compared to both the free dansyl fluorophore and a nanostructure that contained no PEG spacer between the core and the attached dansyl group. The addition of zinc (Zn2+) ions to the aqueous suspension of Fe3O4@SiO2-PEG-DnS led to a 12.5-fold decrease in intensity. The quenching was selective to only Zn2+. No interference was observed by other examined metal cations, including cadmium (Cd2+). A very low detection limit of 6.00 nM in relation to zinc ions was demonstrated. In addition, the newly developed magnetic nanostructured chemosensor was found to be highly stable, reusable and recoverable.

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