题目：

Synthesis and Structure-Dependent Optical Properties of ZnO Nanocomb and ZnO Nanoflag

作者：

Yuting Nie^a, Zhiqiang Wang^b, Jian Wang^c, Feng Bao^a, Jinping Zhang^d, Yanyun Maa *, Tsun-Kong Sham^a,b *, Xuhui Sun^a *

单位：

^aSoochow University-Western University Centre for Synchrotron Radiation, Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Soochow University, Suzhou 215123, China.

^bDepartment of Chemistry, University of Western Ontario, London, ON, N6A 5B7, Canada

^cCanadian Light Source, Saskatoon, Saskatchewan, S7N 0X4, Canada

^dSuzhou Institute of Nano-Tech and Nano-Bionics (SINANO), Chinese academy of sciences, Suzhou 215123, China.

摘要：

The structure-dependent optical properties of ZnO nanostructures have attracted considerable attention due to their fascinating optoelectronic properties and the great structural diversity. Novel ZnO nanocomb and ZnO nanoflag have been successfully synthesized by CVD method using Au nanoparticles (NPs) as the catalyst at the deposition temperature of 900°C and 950°C, respectively. X-ray diffraction and high-resolution transmission electron microscopy results show that the ZnO nanocomb handle and its teeth grow in [01(―)11] and [0001] orientation, respectively, while the ZnO nanoflag sheet and its pole grow along [0001] and [21(―)1(―)0] orientation, respectively. Au NPs as well as deposition temperature played an important role in the growth of the nanocomb handle and nanoflag pole. Synchrotron transmission X-ray microscopy (STXM) reveals the thickness distribution and the crystallinity of ZnO nanocomb and ZnO nanoflag. For the near surface emission, photoluminescence and cathode luminescence spectra of these two ZnO nanostructures show band gap emission from both nanocomb and nanoflag but green emission from only ZnO nanocomb. Synchrotron-based two-dimensional X-ray absorption near edge structure - X-ray excited optical luminescence (2D XANES-XEOL) further reveal that the green (defect) emissions come from both surface and bulk of nanostructures. In the ZnO nanocomb, the O excitation channel contributes more favorably to the band gap emission compared to the defect emission, while the Zn excitation channel contributes less favorably to the band gap emission than the defect emission. Meanwhile, ZnO nanoflag displays an excellent crystallinity with weak defect emission, the Zn and O excitation channel both contribute predominantly to the band gap emission.

影响因子：

4.536

分区情况：

二区

链接：

http://pubs.acs.org/doi/abs/10.1021/acs.jpcc.7b08016