European Synchrotron Radiation Facility, Experiments Division, 38043 Grenoble, France.
Nano Lett. 2011 Dec 14;11(12):5322-6. doi: 10.1021/nl202799e. Epub 2011 Oct 26.
We report on the local structure of single Co-implanted ZnO nanowires studied using a hard X-ray nanoprobe. X-ray fluorescence maps show uniform Zn and Co distributions along the wire within the length scale of the beam size. The X-ray fluorescence data allow the estimation of the Co content within the nanowire. Polarization dependent X-ray absorption near edge structure shows no structural disorder induced neither in the radial nor axial directions of the implanted nanowires after subsequent annealing. Co2+ ions occupy Zn sites into the wurtzite ZnO lattice. Extended X-ray absorption fine structure data reveal high structural order in the host lattice without distortion in their interatomic distances, confirming the recovery of the radiation damaged ZnO structure through thermal annealing.
我们报告了使用硬 X 射线微探针研究的单个 Co 注入 ZnO 纳米线的局域结构。X 射线荧光图谱显示，在光束尺寸的长度范围内，沿纳米线的 Zn 和 Co 分布均匀。X 射线荧光数据允许估计纳米线内的 Co 含量。偏振相关的近边 X 射线吸收结构表明，在随后的退火后，植入纳米线的径向和轴向都没有结构无序。Co2+离子占据 wurtzite ZnO 晶格中的 Zn 位。扩展的 X 射线吸收精细结构数据显示，在没有原子间距离变形的情况下，宿主晶格具有高结构有序性，这证实了通过热退火恢复了辐射损伤的 ZnO 结构。
