Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7682294 | Talanta | 2013 | 6 Pages |
Abstract
A label-free non-aggregation colorimetric sensor has been designed for the detection of Cu2+, based on Cu2+ catalyzing etching of gold nanorods (AuNRs) along longitudinal axis induced by dissolve oxygen in the presence of S2O32â, which caused the aspect ratio (length/width) of AuNRs to decrease and the color of the solution to distinctly change. The linear range and the detection limit (LD, calculated by 10 Sb/k, n=11) of this sensor were 0.080-4.8 µM Cu2+ and 0.22 µM Cu2+, respectively. This sensor has been utilized to detect Cu2+ in tap water and human serum samples with the results agreeing well with those of inductively coupled plasma-mass spectroscopy (ICP-MS), showing its remarkable practicality. In order to prove the possibility of catalyzing AuNRs non-aggregation colorimetric sensor for the detection of Cu2+, the morphological structures of AuNRs were characterized by high resolution transmission electron microscopy (HRTEM) and the sensing mechanism of colorimetric sensor for the detection of Cu2+ was also discussed.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Jia-Ming Liu, Li Jiao, Li-Ping Lin, Ma-Lin Cui, Xin-Xing Wang, Li-Hong Zhang, Zhi-Yong Zheng, Shu-Lian Jiang,