Title: | Triazole functionalized gold nanoparticles for colorimetric Cr+ sensing |
Authors: | Chen, Yu-Ching Lee, I-Lin Sung, Yi-Ming Wu, Shu-Pao 應用化學系 Department of Applied Chemistry |
Keywords: | Colorimetric sensor;Cr3+;Gold nanoparticles;Triazole |
Issue Date: | 1-Nov-2013 |
Abstract: | Triazole functionalized gold nanoparticles (NTP@AuNPs) were synthesized through a click reaction and have been developed for sensitive and selective colorimetric Cr3+ detection. Gold nanoparticles were prepared by reducing HAuCl4 with sodium citrate and then using 4-(prop-2-ynyloxy)pyridine (PP) as the capping agent. The acetylene part of PP and the azide part of 1-(azidomethyl)-4-nitrobenzene were combined to form a triazole structure through a click reaction. Aggregation of NTP@AuNPs was induced immediately in the presence of Cr3+ ions, yielding a color change from red to purple. This Cr3+-induced aggregation of NTP@AuNPs was first monitored using the naked eye and then UV-vis spectroscopy with a detection limit of 1.4 mu M. In addition, NTP@AuNPs were also used to detect Cr3+ in lake water samples, with low interference. (C) 2013 Elsevier B.V. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.snb.2013.06.088 http://hdl.handle.net/11536/23297 |
ISSN: | 0925-4005 |
DOI: | 10.1016/j.snb.2013.06.088 |
Journal: | SENSORS AND ACTUATORS B-CHEMICAL |
Volume: | 188 |
Issue: | |
Begin Page: | 354 |
End Page: | 359 |
Appears in Collections: | Articles |
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