氧化锌纳米棒表面覆盖超薄镍层：物理性能的调控。
Zinc Oxide Nanorods Shielded with an Ultrathin Nickel Layer: Tailoring of Physical Properties.
机构信息
Department of Nanobio-Materials and Electronics, Gwangju Institute of Science and Technology, Gwangju 500712, Republic of Korea.
Department of Physics, School of Engineering and Technology, BML Munjal University, Sidhrawali, Gurgaon-122413, Haryana, India.
出版信息
Sci Rep. 2016 Jun 23;6:28561. doi: 10.1038/srep28561.
We report on the development of Ni-shielded ZnO nanorod (NR) structures and the impact of the Ni layer on the ZnO NR properties. We developed nickel-capped zinc oxide nanorod (ZnO/Ni NR) structures by e-beam evaporation of Ni and the subsequent annealing of the ZnO/Ni core/shell nanostructures. The core/shell NRs annealed at 400 °C showed superior crystalline and emission properties. More interestingly, with the increase of annealing temperature, the crystallinity of the Ni shells over the ZnO NRs gradually changed from polycrystalline to single crystalline. The presence of the Ni layer as a polycrystalline shell completely hindered the light emission and transmission of the ZnO NR cores. Further, the band gap of ZnO NRs continuously decreased with the increase of annealing temperature.
我们报告了 Ni 屏蔽 ZnO 纳米棒（NR）结构的开发以及 Ni 层对 ZnO NR 性能的影响。我们通过电子束蒸发 Ni 并随后对 ZnO/Ni 核/壳纳米结构进行退火，开发了镍封端的氧化锌纳米棒（ZnO/Ni NR）结构。在 400°C 下退火的核/壳 NR 表现出优异的结晶和发射性能。更有趣的是，随着退火温度的升高，Ni 壳在 ZnO NR 上的结晶度逐渐从多晶变为单晶。Ni 层作为多晶壳的存在完全阻碍了 ZnO NR 核的发光和传输。此外，随着退火温度的升高，ZnO NR 的带隙不断减小。
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