Title :
Metal-Silver Based Electrodes as Sensitive Surfaces for Electrochemical Detection of Thio-Heterocycles
Author :
Wang Lai-Hao ; Yung-Hua Lin
Author_Institution :
Dept. of Med. Chem., Chia Nan Univ. of Pharmacy & Sci., Tainan, Taiwan
Abstract :
The electrodeposition of various metal films [lead (Pb), zinc (Zn), cadmium (Cd), copper (Cu), antimony (Sb), nickel (Ni), and tin (Sn)] onto silver (Ag)/quartz crystal substrate is studied using a electrochemical quartz crystal microbalance. The surface morphologies and crystal nanostructures of the dendrites are characterized by a scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy. The composite of the modified bimetallic alloy electrode is characterized by electrochemical impedance spectroscopy and cyclic voltammatry. SEM images show particle sizes ranging from 73 to 280 nm with an average of 215 nm of metal films on the Ag/quartz electrodes. The modified metal Ag/quartz alloy electrodes are used to determine the thio-heterocycle in various supporting electrolytes. We found the electrocatalytic property of zinc is better than that of the other metals and un-coated Ag/quartz.
Keywords :
X-ray spectroscopy; antimony alloys; bimetals; cadmium alloys; catalysis; copper alloys; dendrites; dendritic structure; electrochemical electrodes; electrochemical impedance spectroscopy; electrochemical sensors; electrodeposits; lead alloys; microsensors; nickel alloys; quartz crystal microbalances; scanning electron microscopy; silver alloys; surface morphology; tin alloys; voltammetry (chemical analysis); zinc alloys; Ag; Ag-SiO2; Cd; Cu; Ni; Pb; SEM; Sb; Sn; Zn; crystal nanostructure; cyclic voltammatry; dendrites characterization; electrocatalytic property; electrochemical detection; electrochemical impedance spectroscopy; electrochemical quartz crystal microbalance; energy dispersive X-ray spectroscopy; metal film; metal silver based electrode; modified bimetallic alloy electrode; particle size; quartz crystal substrate; scanning electron microscope; sensitive surface; size 73 nm to 280 nm; surface morphology; thioheterocycles detection; Metal films on Ag/quartz crystal; electrochemical quartz crystal microbalance; thio-heterocycle;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2013.2264481
