Critical Addition Point-Based Trace Sensing of Hg2+ Through Surface Plasma Polaritons Properties Analysis of Ag Nanoparticles
IEEE Sensors Journal(2021)
摘要
In this work, we synthesize and functionalize Ag nanoparticles (NPs) with Sodium tripolyphosphate in one pot. Due to P-3 O-10(5-) _AgNPs aggregation in the presenceofmercury, colorimetric detection with naked eye realize, the limit of detection is 1 mu mol.L-1. Based on one critical additional point with 3 mu mol.L-1 of Hg2+ added, trace sensing of mercury can be performed through absorption spectra analysis, the limit of detection reaches 1nmol.L-1. The TEM image and EDS test tell the mechanism, where the aggregating behavior of P-3 O-10(5-) _AgNPs in the presence of Hg2+ is different from that of Cr3+ and Mn2+. Also, this method possesses high selectivity. This work may pave a facile way in mercury detection sensors.
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关键词
Colorimetric detection,mercury ion sensors,silver nanoparticles,surface plasma polaritons,featured peak
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