镍掺杂氧化锌纳米锥的光学和磁性特性

Optical and magnetic properties of Ni-doped ZnO nanocones.

作者信息

Pan Hui, Ni Zhenhua, Yi Jiabao, Gao Xinyu, Liu Chuanjun, Feng Yuan Ping, Ding Jun, Lin Jianyi, Wee Andrew Thye Shen, Shen Zexiang

机构信息

Department of Physics, National University of Singapore, 2 Science Drive 3, Singapore.

出版信息

J Nanosci Nanotechnol. 2007 Oct;7(10):3620-3. doi: 10.1166/jnn.2007.807.

DOI:10.1166/jnn.2007.807

PMID:18330182

Abstract

Ni-doped ZnO flower-like nanocones with wurzite structures were produced by oxidative evaporation of Zn and Ni powders. The Ni doping did not change the ZnO wurtzite structure. Raman scattering indicated that the normal lattice vibration modes are related to the hexagonal ZnO. Ni clusters and Ni oxides phases did not existed in the sample as characterized by XRD, XPS, and TEM. Upon excitations the nanocones could emit strong green light at 525 nm, which can be directly observed with a digital camera. The magnetic measurement indicated that the Ni-doped ZnO nanocone was high-Curie-temperature magnetic semiconductor.

摘要

通过锌粉和镍粉的氧化蒸发制备出具有纤锌矿结构的镍掺杂氧化锌花状纳米锥。镍掺杂并未改变氧化锌的纤锌矿结构。拉曼散射表明，正常的晶格振动模式与六方氧化锌有关。通过X射线衍射（XRD）、X射线光电子能谱（XPS）和透射电子显微镜（TEM）表征发现，样品中不存在镍团簇和氧化镍相。在激发时，纳米锥可在525纳米处发射出强烈的绿光，用数码相机可直接观察到。磁性测量表明，镍掺杂氧化锌纳米锥是一种高居里温度的磁性半导体。