期刊
ANALYTICAL CHEMISTRY
卷 87, 期 17, 页码 9070-9077出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.analchem.5b02337
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-
资金
- National Natural Science Foundation of China (NSFC) [21335001, 21075004]
The study of behaviors of ionic current rectification (ICR) in organic solutions with quartz nanopipettes is reported. ICR can be observed even in organic solutions using quartz pipettes with diameters varied from several to dozens of nanometers, and the direction of ICR is quite different from the ICR observed in aqueous phase. The influences of pore size, electrolyte concentration, and surface charge on the ICR have been investigated carefully. Water in organic solutions affects the direction and extent of ICR significantly. Mechanisms about the formation of an electrical double layer (EDL) on silica in organic solutions with different amount of water have been proposed. An improved method, which can be employed to detect trace water in organic solutions, has been implemented based on Au ultramicroelectrodes with cathodic differential pulse stripping voltammetry.
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