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    Colorimetric peroxidase mimetic assay for uranyl detection in sea water

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    Type
    Article
    Authors
    Zhang, Dingyuan
    Chen, Zhuo cc
    Omar, Haneen cc
    Deng, Lin cc
    Khashab, Niveen M. cc
    KAUST Department
    Advanced Membranes and Porous Materials Research Center
    Chemical Science Program
    Physical Science and Engineering (PSE) Division
    Smart Hybrid Materials (SHMs) lab
    Date
    2015-02-19
    Online Publication Date
    2015-02-19
    Print Publication Date
    2015-03-04
    Permanent link to this record
    http://hdl.handle.net/10754/564097
    
    Metadata
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    Abstract
    Uranyl (UO2 2+) is a form of uranium in aqueous solution that represents the greatest risk to human health because of its bioavailability. Different sensing techniques have been used with very sensitive detection limits especially the recently reported uranyl-specific DNAzymes systems. However, to the best of our knowledge, few efficient detection methods have been reported for uranyl sensing in seawater. Herein, gold nanoclusters (AuNCs) are employed in an efficient spectroscopic method to detect uranyl ion (UO2 2+) with a detection limit of 1.86 ÎM. In the absence of UO2 2+, the BSA-stabilized AuNCs (BSA-AuNCs) showed an intrinsic peroxidase-like activity. In the presence of UO2 2+, this activity can be efficiently restrained. The preliminary quenching mechanism and selectivity of UO2 2+ was also investigated and compared with other ions. This design strategy could be useful in understanding the binding affinity of protein-stabilized AuNCs to UO2 2+ and consequently prompt the recycling of UO2 2+ from seawater.
    Sponsors
    The authors gratefully acknowledge King Abdullah University of Science and Technology (KAUST) for the support of this work.
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS Applied Materials & Interfaces
    DOI
    10.1021/am507361x
    PubMed ID
    25658750
    ae974a485f413a2113503eed53cd6c53
    10.1021/am507361x
    Scopus Count
    Collections
    Articles; Advanced Membranes and Porous Materials Research Center; Physical Science and Engineering (PSE) Division; Controlled Release and Delivery Laboratory; Chemical Science Program

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