Figure 5From: Highly luminescent near-infrared-emitting gold nanoclusters with further natural etching: photoluminescence and Hg2+ detectionFL response. Of the etched Au NCs (etching for 2 days) upon addition of Hg2+ ions ((a) 0 nM, (b) 1 nM, (c) 100 nM, (d) 10 μM, and (e) 1 mM); FL spectra (down) and photo of the samples taken under UV lamp (up).Back to article page