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Issue 12, 2016
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Silver nanoclusters as fluorescent nanosensors for selective and sensitive nitrite detection

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Abstract

As a highly carcinogenic pollutant but also an important food preservative, nitrite has attracted growing attention in the past few years. In this work, a hyperbranched polyethyleneimine protected silver nanocluster (hPEI-Ag NC) based nanosensor is proposed for the detection of nitrite. The sensing principle consists of two steps: nitrite reacts with hydrogen peroxide (H2O2) to generate peroxynitrous acid under acidic conditions, and the as-formed peroxynitrous acid then induces the aggregation and fluorescence quenching of hPEI-Ag NCs. Due to the specific nitrite–H2O2 chemistry, the hPEI-Ag NC based nanosensor shows high selectivity toward nitrite over other anions with a limit of detection of 100 nM. The practical application of the proposed nanosensor has been validated with lake water, tap water and seawater samples.

Graphical abstract: Silver nanoclusters as fluorescent nanosensors for selective and sensitive nitrite detection

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Publication details

The article was received on 22 Jan 2016, accepted on 21 Feb 2016 and first published on 23 Feb 2016


Article type: Paper
DOI: 10.1039/C6AY00214E
Citation: Anal. Methods, 2016,8, 2628-2633
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    Silver nanoclusters as fluorescent nanosensors for selective and sensitive nitrite detection

    C. Chen, Z. Yuan, H. Chang, F. Lu, Z. Li and C. Lu, Anal. Methods, 2016, 8, 2628
    DOI: 10.1039/C6AY00214E

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