Gold-gold junction electrodes: The disconnection method
Dale, S. E. C., Vuorema, A., Ashmore, E. M. Y., Kasprzyk-Hordern, B., Sillanpää, M., Denuault, G. and Marken, F., 2012. Gold-gold junction electrodes: The disconnection method. Chemical Record, 12 (1), pp. 143-148.
Related documents:This repository does not currently have the full-text of this item.
You may be able to access a copy if URLs are provided below. (Contact Author)
The formation of gold-gold junction electrodes for application in electroanalysis is described here based on electro-deposition from a non-cyanide gold plating bath. Converging growth of two hemispherical gold deposits on two adjacent platinum microelectrodes (both 100 μm diameter in glass, ca. 45 μm gap) followed by careful etching in aqueous chloride solution was employed. During growth both gold hemispheres "connect" and during etching "disconnection" is evident in a drop in current. Gold-gold junctions with sub-micron gaps are formed and applied for the electroanalytical detection of sub-micromolar concentrations of hydroquinone in 0.1 M phosphate buffer pH 7 (E rev = 0.04 V vs. SCE) and sub-micromolar concentration of dopamine in 0.1 M phosphate buffer pH 7 (E rev = 0.14 V vs. SCE). The potential future uses in analysis and limitations of gold-gold junction electrodes are discussed. Copyright
|Creators||Dale, S. E. C., Vuorema, A., Ashmore, E. M. Y., Kasprzyk-Hordern, B., Sillanpää, M., Denuault, G. and Marken, F.|
|Uncontrolled Keywords||sensors,voltammetry,gold electrodes,junction sensor,electroanalysis|
|Departments||Faculty of Science > Chemistry|
Actions (login required)