Title: | Highly selective and sensitive colorimetric detection of Ag(I) using N-1-(2-mercaptoethyl)adenine functionalized gold nanoparticles |
Authors: | Sung, Yi-Ming Wu, Shu-Pao 應用化學系 Department of Applied Chemistry |
Keywords: | Colorimetric sensor;Ag+;Gold nanoparticles;Adenine |
Issue Date: | 1-Jul-2014 |
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. (C) 2014 Elsevier B.V. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.snb.2014.02.044 http://hdl.handle.net/11536/24176 |
ISSN: | 0925-4005 |
DOI: | 10.1016/j.snb.2014.02.044 |
Journal: | SENSORS AND ACTUATORS B-CHEMICAL |
Volume: | 197 |
Issue: | |
Begin Page: | 172 |
End Page: | 176 |
Appears in Collections: | Articles |
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