Journal
ANALYST
Volume 137, Issue 10, Pages 2406-2414Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2an35051c
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Funding
- National Basic Research Program of China (973 Program) [2010CB933600]
- NSFC [21125521]
- Chinese Academy of Sciences
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The development of a user-friendly sensing platform for the detection of Cu2+ in water is necessary as there are wide concerns due to the substantial impact of Cu2+ on human health, environmental monitoring, and so on. Motivated by this, we report a fluorescent silver nanoclusters (AgNCs)-based sensor for the detection of Cu2+. These water-soluble AgNCs, as a new class of fluorescent probes, were synthesized by using azobenzene modified poly(acrylic acid) (MPAA) as templates. Their fluorescence can be quenched in the presence of Cu2+, which enables the label-free detection of Cu2+ in real water samples. Furthermore, such AgNCs can be integrated onto cellulose filter paper and used as fluorescent indicators for Cu2+. The fluorescence quenching can be observed by the naked eye under UV light. It should be noted that this AgNCs-based paper assay performs successfully in barrelled drinking water and river water samples. Therefore, it opens up new avenues to the development of robust clusters-based sensing platforms.
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