標題: Colorimetric detection of Cd(II) ions based on di-(1H-pyrrol-2-yl)methanethione functionalized gold nanoparticles
作者: Sung, Yi-Ming
Wu, Shu-Pao
應用化學系
Department of Applied Chemistry
關鍵字: Colorimetric sensor;Cd(II);Gold nanoparticles;Di-(1H-pyrrol-2-yl)methanethione
公開日期: 1-十月-2014
摘要: A sensitive and selective colorimetric Cd2+ detection method was developed using di-(1H-pyrrol-2-yl)methanethione functionalized gold nanoparticles (DP-AuNPs). Aggregation of DP-AuNPs was induced immediately in the presence of Cd2+, yielding a color change from red to blue. This Cd2+-induced aggregation of DP-AuNPs was monitored using the naked eye and UV-vis spectroscopy. The SPR absorbance( 635 nm) of the reaction between DP-AuNPs and Cd2+ shows a good linearity in the Cd2+ concentration range of 0.5-16 mu M and a low detection limit 16.6 nM (S/N = 3). The DP-AuNPs showed excellent selectivity toward Cd2+ compared to other metal ions Ag+, Al3+, Ca2+, Cd2+, Co2+, Cr3+, Cu2+, Fe2+, Fe3+, Hg2+, Mg2+, Mn2+, Ni2+, Pb2+, and Zn2+. Optimal detection of Cd2+ was achieved over a pH range from 4 to 9.5. Furthermore, DP-AuNPs were applied to detect Cd2+ in lake water, showing low interference. (C) 2014 Elsevier B.V. All rights reserved.
URI: http://dx.doi.org/10.1016/j.snb.2014.04.069
http://hdl.handle.net/11536/147723
ISSN: 0925-4005
DOI: 10.1016/j.snb.2014.04.069
期刊: SENSORS AND ACTUATORS B-CHEMICAL
Volume: 201
起始頁: 86
結束頁: 91
顯示於類別:期刊論文