Optical recognition of surface chirality at Au(hkl) single crystalline surfaces by second harmonic generation rotational anisotropy.
Optical recognition of surface chirality at Au(hkl) single crystalline surfaces by second harmonic generation rotational anisotropy.
复制标题
DOI：
10.1021/ja053724p
复制
发表时间：
2005-08
影响因子：
15
通讯作者：
Ichizo Yagi;Masaki Chiba;K. Uosaki
中科院分区：
文献类型：
--
作者：
Ichizo Yagi;Masaki Chiba;K. Uosaki
利用光学二次谐波（SHG）测量技术，研究了天然手性金单晶表面的二维手性。在Au（643）S和Au（643）R表面上的SH-RA图是镜像对称的。在具有相同台阶和扭结结构但不同（111）台阶宽度的手性Au（hkl）表面上的系统SH-RA测量表明表面台阶密度与缺陷引起的SH-RA拟合参数之间存在线性相关性。这些结果表明，SH-RA测量提供的信息不仅对表面手性，但也对表面缺陷的密度。
Two-dimensional chirality at naturally chiral gold single crystalline surfaces was detected and characterized using optical second harmonic generation (SHG) measurements. SHG rotational anisotropy (SH-RA) patterns at Au(643)S and Au(643)R surfaces were mirror symmetric to each other. Systematic SH-RA measurements at chiral Au(hkl) surfaces with the same step and kink structures but different (111) terrace widths showed a linear correlation between surface step density and SH-RA fitting parameters arising from defects. These results indicate that SH-RA measurements provide information not only on surface chirality but also on density of surface defects.