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- W2220154212 abstract "This paper developed a novel colorimetric strategy for the detection of Hg2+ based on the apical activation and passivation of unmodified triangular silver nanoprism (AgNPR). Triangular AgNPR can be rapidly etched into round nanodiscs by thiosulfate anion (S2O32−), leading to a change in colloid color from blue to yellow. However, if Hg2+ is introduced into the system together with S2O32−, changes in the shape and color of the AgNPR can be effectively prevented by the specific precipitation reaction between Hg2+ and S2O32−. The shape evolution of AgNPR was clearly revealed by the TEM measurements, including apical corrosion at the three corner sites and selectively HgS deposited over the etched zones. The spectroscopic changes in localized surface plasmon resonance (LSPR) wavelength of the AgNPR were used as the analytical signal, and a novel colorimetric platform for Hg2+ detection was established in a label-free fashion. It provides reliable and sensitive quantification with a detection limit as low as 0.2 nM and a dynamic range of 5.0 nM to 10.0 μM. Furthermore, this method has been successfully implemented for the determination of Hg2+ in wastewater samples." @default.
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- W2220154212 date "2015-12-01" @default.
- W2220154212 modified "2023-10-18" @default.
- W2220154212 title "Selective deposition of HgS at the corner sites of triangular silver nanoprism and its tunable LSPR for colorimetric Hg2+ detection" @default.
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- W2220154212 doi "https://doi.org/10.1016/j.snb.2015.07.083" @default.
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