Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
742069 | Sensors and Actuators B: Chemical | 2014 | 5 Pages |
Abstract
A sensitive and selective colorimetric Ag+ detection method was developed by using N-1-(2-mercaptoethyl)adenine functionalized gold nanoparticles (MEA-AuNPs). The presence of Ag+ immediately induced aggregation of MEA-AuNPs, yielding a color change from red to blue. This Ag+-induced aggregation of MEA-AuNPs was monitored by bare eye and UV–vis spectroscopy with a detection limit of 3.3 nM. MEA-AuNPs showed excellent selectivity toward Ag+ compared with other metal ions through interaction between adenine and Ag+. The best detection of Ag+ was achieved at pH 6–9. Furthermore, MEA-AuNPs were applied to detect Ag+ in lake water with low interference.
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Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Yi-Ming Sung, Shu-Pao Wu,