The Experts below are selected from a list of 102 Experts worldwide ranked by ideXlab platform
Kohei Uosaki - One of the best experts on this subject based on the ideXlab platform.
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an in situ electrochemical quartz crystal microbalance study of the Dissolution Process of a gold electrode in perchloric acid solution containing chloride ion
Journal of The Electrochemical Society, 1998Co-Authors: Chikara Ishibashi, Katsuaki Shimazu, Kohei UosakiAbstract:The Anodic Dissolution Process of a Au(111) oriented electrode in HClO 4 solution containing various concentrations of chloride ion was investigated using an electrochemical quartz crystal microbalance (EQCM) under potential sweep and potentiostatic conditions. The in situ EQCM results clearly demonstrated that gold dissolves through a 3e - oxidation Process in the Anodic potential region. No evidence for the 1e - Dissolution was obtained in the present study.
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in situ observation of Anodic Dissolution Process of p gaas 001 in hcl solution by surface x ray diffraction
Journal of Electroanalytical Chemistry, 1997Co-Authors: Kohei Uosaki, Michio Koinuma, Toshihiro Kondo, Ichizo Yagi, Hidenori Noguchi, Kazuhisa Tamura, Kunikazu Takeshita, Tadashi MatsushitaAbstract:Abstract The grazing incidence X-ray diffraction technique has been applied to monitor the Anodic Dissolution Process of GaAs(001) in 0.1 M HCl solution. The surface diffraction intensity for the 〈11〉 direction of GaAs(001) was clearly observed and it decreased with time when the positive potential was applied to the electrode.
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in situ observations of atomic resolution image and Anodic Dissolution Process of p gaas in hcl solution by electrochemical atomic force microscope
Surface Science, 1994Co-Authors: Michio Koinuma, Kohei UosakiAbstract:Abstract Surfaces of p-GaAs(100) electrodes in HCl solution were studied by using an electrochemical atomic force microscope with atomic resolution. Truncated pyramids of relatively uniform size (50–100 nm square) were formed if p-GaAs(100) was Anodically polarized. An atomic arrangement of (100)−(1 × 1) structure was observed on the terrace of the truncated pyramid when the electrode was kept in the potential region where no current flowed.
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in situ observation of Anodic Dissolution Process of n gaas in hcl solution by electrochemical atomic force microscope
Journal of Vacuum Science & Technology B, 1994Co-Authors: Michio Koinuma, Kohei UosakiAbstract:Anodic Dissolution of a GaAs(100) face was investigated by in situ electrochemical atomic force microscope (AFM). While no surface structure change was observed at −0.6 V (vs Ag/AgCl) where no current flowed, dome structure on surface was removed, and flat surface was obtained after keeping the potential at 0 V (vs Ag/AgCl) where Anodic current of ∼150 μA cm−2 flowed. An atomically resolved AFM image was obtained in the flat region and shows the surface is dominated by a (111) face after the Anodic Dissolution.
Michio Koinuma - One of the best experts on this subject based on the ideXlab platform.
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in situ observation of Anodic Dissolution Process of p gaas 001 in hcl solution by surface x ray diffraction
Journal of Electroanalytical Chemistry, 1997Co-Authors: Kohei Uosaki, Michio Koinuma, Toshihiro Kondo, Ichizo Yagi, Hidenori Noguchi, Kazuhisa Tamura, Kunikazu Takeshita, Tadashi MatsushitaAbstract:Abstract The grazing incidence X-ray diffraction technique has been applied to monitor the Anodic Dissolution Process of GaAs(001) in 0.1 M HCl solution. The surface diffraction intensity for the 〈11〉 direction of GaAs(001) was clearly observed and it decreased with time when the positive potential was applied to the electrode.
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in situ observations of atomic resolution image and Anodic Dissolution Process of p gaas in hcl solution by electrochemical atomic force microscope
Surface Science, 1994Co-Authors: Michio Koinuma, Kohei UosakiAbstract:Abstract Surfaces of p-GaAs(100) electrodes in HCl solution were studied by using an electrochemical atomic force microscope with atomic resolution. Truncated pyramids of relatively uniform size (50–100 nm square) were formed if p-GaAs(100) was Anodically polarized. An atomic arrangement of (100)−(1 × 1) structure was observed on the terrace of the truncated pyramid when the electrode was kept in the potential region where no current flowed.
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in situ observation of Anodic Dissolution Process of n gaas in hcl solution by electrochemical atomic force microscope
Journal of Vacuum Science & Technology B, 1994Co-Authors: Michio Koinuma, Kohei UosakiAbstract:Anodic Dissolution of a GaAs(100) face was investigated by in situ electrochemical atomic force microscope (AFM). While no surface structure change was observed at −0.6 V (vs Ag/AgCl) where no current flowed, dome structure on surface was removed, and flat surface was obtained after keeping the potential at 0 V (vs Ag/AgCl) where Anodic current of ∼150 μA cm−2 flowed. An atomically resolved AFM image was obtained in the flat region and shows the surface is dominated by a (111) face after the Anodic Dissolution.
Tadashi Matsushita - One of the best experts on this subject based on the ideXlab platform.
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in situ observation of Anodic Dissolution Process of p gaas 001 in hcl solution by surface x ray diffraction
Journal of Electroanalytical Chemistry, 1997Co-Authors: Kohei Uosaki, Michio Koinuma, Toshihiro Kondo, Ichizo Yagi, Hidenori Noguchi, Kazuhisa Tamura, Kunikazu Takeshita, Tadashi MatsushitaAbstract:Abstract The grazing incidence X-ray diffraction technique has been applied to monitor the Anodic Dissolution Process of GaAs(001) in 0.1 M HCl solution. The surface diffraction intensity for the 〈11〉 direction of GaAs(001) was clearly observed and it decreased with time when the positive potential was applied to the electrode.
S.m. Abd El Haleem - One of the best experts on this subject based on the ideXlab platform.
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Anodic Dissolution of Nickel in Acidic Chloride Solutions
Journal of Materials Engineering and Performance, 2003Co-Authors: E.e. Abd El Aal, W. Zakria, A. Diab, S.m. Abd El HaleemAbstract:The Anodic Dissolution of nickel was studied galvanostatically in hydrochloric acid solutions of various concentrations. The reaction orders of chloride ion and hydrogen ion concentrations were found to be 0.5 and 1.0, respectively. An Anodic Tafel slope equal to 120 ± 10 mV · decade−1 was obtained. The Dissolution rate of nickel at constant acid concentration was increased with stirring of the solution and increasing temperature. The activation energy, ΔH, for the Anodic Dissolution Process was found to be 12 kcal · mol−1. The presence of oxygen in solutions assisted the passivation Process. The effect of addition of aniline and some of its derivatives (o-, m-, and p-anisidine) as inhibitors on the Dissolution kinetics of Ni in 1 M HCl was also investigated. These compounds inhibited the Anodic Dissolution of nickel without affecting the Tafel slope, indicating that the adsorption of such inhibitors could not interfere with the mechanism of metal Dissolution.
Fuhui Wang - One of the best experts on this subject based on the ideXlab platform.
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electrochemical noise analysis of the corrosion of az91d magnesium alloy in alkaline chloride solution
Electrochimica Acta, 2007Co-Authors: Tao Zhang, Yawei Shao, Guozhe Meng, Fuhui WangAbstract:The corrosion behavior of AZ91D magnesium alloy in alkaline chloride solution was investigated by electrochemical noise (EN). The wavelet transform, as well as noise resistance (R-n) and power spectral density (PSD), had been employed to analyze the EN data. It was revealed that there exist three different stages of corrosion for AZ91D magnesium alloy in alkaline chloride solution, including an Anodic Dissolution Process companying with the growth, absorption and desorption of hydrogen bubbles, a development of pitting corrosion, an inhibition Process by protective MgH2 film. The results demonstrated that energy distribution plot (EDP) was a powerful tool to provide useful information about the dominant Process for the different corrosion stages. (c) 2007 Published by Elsevier Ltd.