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http://dx.doi.org/10.9713/kcer.2014.52.4.538

Surface Properties of Glutathione Layer Formed on Gold Surfaces Interacting with ZrO2  

Park, Jin-Won (Department of Chemical and Biomolecular Engineering, College of Energy and Biotechnology, Seoul National University of Science and Technology)
Publication Information
Korean Chemical Engineering Research / v.52, no.4, 2014 , pp. 538-543 More about this Journal
Abstract
It is investigated that that the physical properties of Glutathione layer formed on gold surfaces may make an effect on the distribution of either gold particle adsorbed to the $ZrO_2$ surface or vice versa with the adjustment of the electrostatic interactions. For the investigation, the atomic force microscope (AFM) was used to measure the surface forces between the surfaces as a function of the salt concentration and pH value. The forces were quantitatively analyzed with the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory to estimate the surface potential and charge density of the surfaces for each condition of salt concentration and pH value. The estimated-value dependence on the salt concentration was described with the law of mass action, and the pH dependence was explained with the ionizable groups on the surface. The salt concentration dependence of the surface properties, found from the measurement at pH 4 and 8, was consistent with the prediction from the law. It was found that the Glutathione layer had higher values for the surface charge densities and potentials than the zirconium dioxide surfaces at pH 4 and 8, which may be attributed to the ionized-functional-groups of the Glutathione layer.
Keywords
Glutathione; Gold Surface; $ZrO_2$ Surface; AFM; DLVO Theory;
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Times Cited By KSCI : 4  (Citation Analysis)
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