Observation and control of interfacial defects in ZnO/ZnSe coaxial nanowires

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	Observation and control of interfacial defects in ZnO/ZnSe coaxial nanowires
	Bhutto, W.A. ; Wu, Z.M. ; Cao, Y.Y. ; Wang, W.P. ; Kang, J.Y. ; Kang JY(康俊勇)
刊名	http://dx.doi.org/10.12693/APhysPolA.125.994
	2014
关键词	Chemical vapor deposition High resolution transmission electron microscopy Scanning electron microscopy Structural optimization Zinc oxide Zinc sulfide
英文摘要	ZnO/ZnSe coaxial nanowires with different ZnO core diameters were synthesized by using a two-step chemical vapor deposition. The scanning electron microscopy images demonstrated that the coaxial nanowires with small ZnO core diameter had the smoother surface than that with large ZnO core diameter. A coherent ZnSe layer with wurtzite structure was observed in the nanowire interface between the ZnO core and the ZnSe shell by high resolution transmission electron microscopy. This coherent layer is beneficial to reduce the defect density and improve the crystal quality by suppressing the phase transition. It was found that the coherent thickness was significantly related to the ZnO core diameter. For the nanowire with large ZnO core, a thin critical thickness of 2-3 nm was obtained. As a result, a layer of zinc blende ZnSe appeared outside the nanowire, and a lot of defects existed in the interface between the ZnSe layers with different phase structures. For the nanowire with small ZnO core, however, the critical thickness increased and a coherent coaxial structure was observed with the same lattice spacing in the ZnO core and the ZnSe shell. To obtain defect-free coaxial nanowire, an optimal structure was also proposed by theoretical calculation.
语种	英语
出版者	Polish Academy of Sciences
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/92305]
专题	物理技术－已发表论文
推荐引用方式 GB/T 7714	Bhutto, W.A.,Wu, Z.M.,Cao, Y.Y.,et al. Observation and control of interfacial defects in ZnO/ZnSe coaxial nanowires[J]. http://dx.doi.org/10.12693/APhysPolA.125.994,2014.
APA	Bhutto, W.A.,Wu, Z.M.,Cao, Y.Y.,Wang, W.P.,Kang, J.Y.,&康俊勇.(2014).Observation and control of interfacial defects in ZnO/ZnSe coaxial nanowires.http://dx.doi.org/10.12693/APhysPolA.125.994.
MLA	Bhutto, W.A.,et al."Observation and control of interfacial defects in ZnO/ZnSe coaxial nanowires".http://dx.doi.org/10.12693/APhysPolA.125.994 (2014).