ZnO辐射微米球和微米带梳的特征及生长机理
Growth Mechanism and Characterization of ZnO Radial Microspheres and Comb-Like Microbelts

作者: 吴 亭 , 许永杰 , 李新宇 , 张津瑞 , 陈运生 , 陈镫善 , 吉愈旭 :桂林理工大学理学院,广西 桂林;

关键词: ZnO辐射微米球ZnO微米带梳光致发光纳米线纳米带ZnO Radial Microspheres ZnO Comb-Like Microbelts Photoluminescence Nanowires Nanobelts

摘要:
采用化学气相沉积法成功制备出具有特殊形貌的ZnO辐射微米球以及微米带梳,并对其生长机理进行了研究。合成的ZnO样品是六方纤锌矿结构,其中,ZnO辐射微米球通过两步生长,先成核,后生长纳米线,通过实验发现辐射球状结构的形成关键步骤是在通入氧气之前形成Zn液滴。而微米带梳的生长是通过VS机制先形成微米带,一侧的纳米带阵列通过自催化生长平行于(0001)极性面形成。通过光致荧光谱测试,本文发现室温光致发光峰位于~390 nm和~495 nm处,分别对应紫外和绿光发射峰。

Abstract: ZnO radial microspheres and comb-like microbelts were synthesized by Chemical Vapor Deposition (CVD). The synthesized ZnO products are hexagonal wurtzite structured. The formation of ZnO radial microspheres follows a two-step process: one is nucleation and another is growth. It is found that the formation of the sphere-shaped liquid Zn droplets before adding oxygen is a key factor to control the morphology of the ZnO radial microspheres. The formation of the comb-like microbelts follows the process: the microbelt is formed by a vapor-solid (VS) growth mechanism firstly, and then the nanobelts on one side are grown by a self-catalysis growth paralleling to the (0001) polar surface. Photoluminescence (PL) spectrum shows two typical emission peaks at ~390 nm and at ~495 nm which were assigned to UV emission and green emission, respectively.

文章引用: 吴 亭 , 许永杰 , 李新宇 , 张津瑞 , 陈运生 , 陈镫善 , 吉愈旭 (2017) ZnO辐射微米球和微米带梳的特征及生长机理。 材料科学, 7, 371-376. doi: 10.12677/MS.2017.73050

参考文献

[1] Geng, B.Y., Xie, T., et al. (2003) Large-Scale Synthesis of ZnO Nanowires Using a Low-Temperature Chemical Route and Their Photoluminescence Properties. Applied Physics A, 77, 363-366.
https://doi.org/10.1007/s00339-003-2167-8

[2] Lee, W., Jeong, M.-C., et al. (2004) Catalyst-Free Growth of ZnO Nanowires by Metal-Organic Chemical Vapour Deposition (MOCVD) and Thermal Evaporation. Acta Materialia, 52, 3949-3957.

[3] Zheng, M.J., Zhang, L.D., et al. (2002) Fabrication and Optical Properties of Large-Scale Uniform Zinc Oxide Nanowire Arrays by One-Step Electrochemical Deposition Technique. Chemical Physics Letters, 363, 123-128.

[4] Chiou, W.-T., Wu, W.-Y. and Ting, J.-M. (2003) Growth of Single Crystal ZnO Nanowires Using Sputter Deposition. Diamond and Related Materials, 12, 1841-1844.

[5] Chen, Y.F., Bagnall, D. and Yao, T.F. (2000) ZnO as a Novel Photonic Material for the UV Region. Materials Science and Engineering: B, 75, 190-198.

[6] Shen, G., Bando, Y. and Lee, C.-J. (2005) Synthesis and Evolution of Novel Hollow ZnO Urchins by a Simple Thermal Evaporation Process. The Journal of Physical Chemistry B, 109, 10578-10583.
https://doi.org/10.1021/jp051078a

[7] Wang, Z.L., Kong, X.Y. and Zuo, J.M. (2003) Induced Growth of Asymmetric Nanocantilever Arrays on Polar Surfaces. Physical Review Letters, 91, Article ID: 185502.
https://doi.org/10.1103/PhysRevLett.91.185502

[8] Gao, P. and Wang, Z.L. (2003) Mesoporous Polyhedral Cages and Shells Formed by Textured Self-Assembly of ZnO Nanocrystals. Journal of the American Chemical Society, 125, 11299-11305.

[9] Chen, Y.Q., Jiang, J., He, Z.Y., Su, Y., Cai, D. and Chen, L. (2005) Growth Mechanism and Characterization of ZnO Microbelts and Self-Assembled Microcombs. Materials Letters, 59, 3280-3283.

[10] Vanheusden, K., Warren, W.L., Seager, C.H., Tallant, D.K., Voigt, J.A. and Gnade, B.E. (1996) Mechanisms behind Green Photoluminescence in ZnO Phosphor Powders. Journal of Applied Physics, 79, 7983.

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