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Title 

Precisely determining ultralow level UO2(2+) in natural water with plasmonic nanowire interstice sensor

Authors 

R GwakH KimS M YooS Y LeeG J LeeM K LeeC K RheeTaejoon KangB Kim

Publisher 

Nature Publishing Group

Issue Date 

2016

Citation 

Scientific Reports, vol. 6, no. 0, pp. 19646-19646

Abstract 

Uranium is an essential raw material in nuclear energy generation; however, its use raises concerns about the possibility of severe damage to human health and the natural environment. In this work, we report an ultrasensitive uranyl ion (UO2 2+) detection method in natural water that uses a plasmonic nanowire interstice (PNI) sensor combined with a DNAzyme-cleaved reaction. UO2 2+ induces the cleavage of DNAzymes into enzyme strands and released strands, which include Raman-active molecules. A PNI sensor can capture the released strands, providing strong surface-enhanced Raman scattering signal. The combination of a PNI sensor and a DNAzyme-cleaved reaction significantly improves the UO2 2+ detection performance, resulting in a detection limit of 1pM and high selectivity. More importantly, the PNI sensor operates perfectly, even in UO2 2+-contaminated natural water samples. This suggests the potential usefulness of a PNI sensor in practical UO2 2+-sensing applications. We anticipate that diverse toxic metal ions can be detected by applying various ion-specific DNA-based ligands to PNI sensors.

ISSN 

2045-2322

Link 

http://dx.doi.org/10.1038/srep19646

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2019-05-02


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