Liu Lixin, Zhang Hongliang, Wang Yuan, Su Yurong, Ma Ziwei, Xie Yizhu, Zhao Haiting, Chen Changcheng, Liu Yanxia, Guo Xiaosong, Su Qing, Xie Erqing
Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, 730000 Lanzhou, People's Republic of China.
Nanoscale Res Lett. 2010 Jun 1;5(9):1418-1423. doi: 10.1007/s11671-010-9655-5.
ZnO/HfO(2):Eu nanocables were prepared by radio frequency sputtering with electrospun ZnO nanofibers as cores. The well-crystallized ZnO/HfO(2):Eu nanocables showed a uniform intact core-shell structure, which consisted of a hexagonal ZnO core and a monoclinic HfO(2) shell. The photoluminescence properties of the samples were characterized. A white-light band emission consisted of blue, green, and red emissions was observed in the nanocables. The blue and green emissions can be attributed to the zinc vacancy and oxygen vacancy defects in ZnO/HfO(2):Eu nanocables, and the yellow-red emissions are derived from the inner 4f-shell transitions of corresponding Eu(3+) ions in HfO(2):Eu shells. Enhanced white-light emission was observed in the nanocables. The enhancement of the emission is ascribed to the structural changes after coaxial synthesis.
以电纺ZnO纳米纤维为芯，通过射频溅射制备了ZnO/HfO₂:Eu纳米电缆。结晶良好的ZnO/HfO₂:Eu纳米电缆呈现出均匀完整的核壳结构，由六方ZnO核和单斜HfO₂壳组成。对样品的光致发光性能进行了表征。在纳米电缆中观察到由蓝色、绿色和红色发射组成的白光带发射。蓝色和绿色发射可归因于ZnO/HfO₂:Eu纳米电缆中的锌空位和氧空位缺陷，黄红色发射源自HfO₂:Eu壳中相应Eu(3+)离子的内4f壳层跃迁。在纳米电缆中观察到增强的白光发射。发射增强归因于同轴合成后的结构变化。
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