Preparation of a Highly Ordered Au (111) Phase on a Polycrystalline Gold Substrate by Vacuum Deposition and Its Characterization by XRD, GISXRD, STM/AFM, and Electrochemical Measurements
Preparation of a Highly Ordered Au (111) Phase on a Polycrystalline Gold Substrate by Vacuum Deposition and Its Characterization by XRD, GISXRD, STM/AFM, and Electrochemical Measurements
复制标题
通过真空沉积在多晶金基底上制备高度有序的 Au (111) 相并通过 XRD、GISXRD、STM/AFM 和电化学测量对其进行表征
DOI：
10.1021/j100038a051
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发表时间：
1995
期刊：
影响因子：
--
通讯作者：
T. Kondo
中科院分区：
文献类型：
--
作者：
K. Uosaki;Ye Shen;T. Kondo
通过在多晶金盘基板上进行真空沉积并随后进行退火淬火处理，获得了原子级光滑、高度有序的 Au（111）相。 X射线衍射数据表明，在如上制备的样品中，对应于(111)取向的峰强度占主导地位，而其他小峰对应于除(111)以外的取向。在使用同步加速器轨道辐射的掠入射表面X射线衍射测量中，在如上制备的样品中仅观察到对应于(111)表面相的强而尖锐的峰。这些结果表明样品表面仅存在(111)取向。分别通过 STM 和 AFM 测量观察到交叉角为 60 的单原子阶梯线（正如对于具有 3 重对称性的表面所预期的那样）以及（111）取向的原子排列。电化学测量证实了上述制备的样品具有高质量的表面取向，并且对应于金氧化物形成和铜的潜在沉积/解吸的峰值电势与在Au（111）单晶电极处获得的值非常一致。
An atomically smooth, highly ordered Au (111) phase was obtained by vacuum deposition on a polycrystalline gold disk substrate followed byanneal-quenching treatment. The X-ray diffraction data showed that the intensity of a peak corresponding to the (111) orientation dominates, in the samples prepared as above, with other small peaks corresponding to orientations other than (111). Only a strong and sharp peak corresponding to the (111) surface phase was observed in the samples prepared as above in grazing incident surface X-ray diffraction measurements using synchrotron orbital radiation. These results indicate that only the (111) orientation existed at the surface of the sample. The monoatomic step lines with a crossing angle of 60, as expected for a surface with 3-fold symmetry, and the atomic arrangement of (111) orientation were observed by STM and AFM measurements, respectively. Electrochemical measurements confirmed the high quality of the surface orientation in the sample prepared as above, and the peak potentials corresponding togold oxide formation and under potential deposition/desorption of copper are in good agreement with the values obtained at a Au (111) single-crystal electrode.