A simple, low-cost and label-free Hg2+ ion sensor has been developed by using novel luminescent Ag+ nanoclusters (NCs) with an excellent optical property (quantum yield = 15%), an ultra-high ratio of active Ag+ species in the NC surface (∼100%), and an ultra-short diffusion path length of Hg2+ ions to access the NC surface (∼0.5 nm).
X. Yuan, T. J. Yeow, Q. Zhang, J. Y. Lee and J. Xie, Nanoscale, 2012, 4, 1968 DOI: 10.1039/C2NR11999D
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