Mercury-plated thin film ITO microelectrode array for analysis of heavy metals

Autor:	Ch. Knedlik, V. Breternitz, Vlastimil Rehacek, K. Shtereva, Vladimir Tvarozek, Ivan Novotny, Lothar Spiess
Rok vydání:	2005
Předmět:	Materials science Inorganic chemistry Analytical chemistry Multielectrode array Condensed Matter Physics Surfaces Coatings and Films Indium tin oxide Microelectrode Anodic stripping voltammetry Sputtering Thin film Cyclic voltammetry Electroplating Instrumentation
Zdroj:	Vacuum. 80:132-136
ISSN:	0042-207X
DOI:	10.1016/j.vacuum.2005.07.025
Popis:	We have developed a mercury-plated microelectrode array based on Indium Tin Oxide (ITO) films (600 nm) prepared by rf reactive sputtering on a silicon substrate. Microelectrode behaviour of the disc arrays has been characterised by cyclic voltammetry (CV). Electroplating of mercury onto the ITO microelectrode array was carried out in a solution of Hg(NO3)2 and KNO3 by applying a potential of −1500 mV vs. Ag/AgCl/Cl− for varying charge (350–1050 μC). Mercury plating and Pb2+ pre-concentration conditions were optimised for ex situ determination of Pb2+ in aqueous solution by anodic stripping voltammetry (ASV). The sensitivity of ITO-Hg microelectrode array to Pb2+ was 130 nA(mol/l)−1.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::9277e1cee6dfd082bd4dab2f7f6e4399 https://doi.org/10.1016/j.vacuum.2005.07.025 Zobrazit plný text záznamu Full Text from ScienceDirect