지르코니아와 상호작용하는 금 표면 위의 메르캡토파이러빅산층 표면 물성

It is investigated that the surface properties of mercaptopyruvic-acid layer formed on gold surfaces may make an effecton the distribution of either gold particle adsorbed to the zirconia surface or vice versa. For the investigation, the atomic forcemicroscope was used to measure the surface forces between the surfaces as a function of the salt concentration and pH value. Theforces were quantitatively analyzed with the derjaguin-landau-verwey-overbeek (DLVO) theory to estimate the electrostaticproperties, potential and charge density, of the surfaces for each condition of salt concentration and pH value. The estimatedvaluedependence on the salt concentration was explained with the law of mass action, and the pH dependence was interpretedwith the ionizable groups on the surface. The salt concentration dependence of the surface properties, found from the measurementat pH 4 and 8, was predictable from the law. It was found that the mercaptopyruvic-acid layer had higher values forthe surface charge densities and potentials than the zirconia surfaces at pH 4 and 8, which may be attributed to the ionizedfunctional-groups of the mercaptopyruvic-acid layer.