Author(s): Tang, HR (Tang, Haoran); Zhu, JH (Zhu, Jiahui); Xiao, XQ (Xiao, Xiaoqing); Wang, ZJ (Wang, Zhijie); Wang, H (Wang, Hao); Li, YX (Li, Yongxin)
Source: SENSORS AND ACTUATORS B-CHEMICAL Volume: 282 Pages: 523-528 DOI: 10.1016/j.snb.2018.11.091 Published: MAR 1 2019
Abstract: In this paper, single Hg nanoelectrodes were prepared by single nucleation/growth of mercury on the surface of single gold nanodisk electrodes, which were fabricated by improved laser-assisted pulling method. The nucleation/growth process was characterized by scanning electron microscopy (SEM), transition electron microscopy (TEM) and electrochemical method. Pb2+ and Cu2+ could be accumulated and melted with single Hg nanoelectrodes (amalgam formed) through preconcentration step, and then two typical anodic waves would be obtained through square-wave anodic stripping voltammetry (SWASV) method. The peak currents were corresponded to the concentration of Pb2+ and Cu2+, and thus the single Hg nanoelectrodes could be used as a kind of novel nanosensor for simultaneous detection of lead and copper with high sensitivity and selectivity.
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