Title: Triazole-acetate functionalized gold nanoparticles for colorimetric Pb(II) sensing
Authors: Lee, I-Lin
Sung, Yi-Ming
Wu, Shu-Pao
Department of Applied Chemistry
Issue Date: 2014
Abstract: New triazole-acetate functionalized gold nanoparticles (TTA-AuNPs) for sensitive and selective colorimetric detection of Pb2+ were developed. Aggregation of TTA-AuNPs was induced immediately in the presence of Pb2+, yielding a color change from wine-red to purple. This Pb2+-induced aggregation of TTA-AuNPs was monitored by the bare eye and UV-vis spectroscopy with a detection limit of 16.7 nM. TTA-AuNPs showed excellent selectivity toward Pb2+ compared to other metal ions through the interaction between the carboxyl group and triazole structure of TTA and Pb2+. The best detection of Pb2+ was achieved in a pH range from 5 to 10. Furthermore, TTA-AuNPs were applied to detect Pb2+ in lake water with low interference.
URI: http://hdl.handle.net/11536/24573
ISSN: 2046-2069
DOI: 10.1039/c4ra02448f
Volume: 4
Issue: 48
Begin Page: 25251
End Page: 25256
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