Preparation and electrochemical response of 1-3 nm Pt disk electrodes.
作者： Yongxin Li , David Bergman , Bo Zhang
DOI: 10.1021/AC900777N
关键词: Electron transfer 、 Ferrocene 、 Capillary action 、 Transmission electron microscopy 、 Bilayer 、 Analytical chemistry 、 Chemistry 、 Reaction rate constant 、 Voltammetry 、 Electrode
摘要: The preparation and characterization of Pt nanoelectrodes in the range 1 to 3 nm radii are reported. A microwire is sealed into a bilayer quartz capillary pulled an ultrasharp nanowire silica tip using laser-assisted pulling process. then piece glass tubing, which manually polished expose Pt. Transmission electron microscopy steady-state voltammetry utilized characterize nanoelectrodes. results show that minimum size nanoelectrode determined by parameters used heterogeneous transfer rate constant for oxidation ferrocene, ferrocenemethanol, potassium hexachloroiridate (III) from method Mirkin Bard found be k° = 7.6 ± 3.4 cm/s α 0.85 0.06 7.4 6.9 0.78 0.16 6.0 4.2 c...
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