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Chinese Physics, 2005, Vol. 14(3): 586-591    DOI: 10.1088/1009-1963/14/3/029
CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES Prev   Next  

The synthesis of one-dimensional controllable ZnO microrods

Zhang Lin-Li (张琳丽)ab, Guo Chang-Xin (郭常新)ab, Chen Jian-Gang (陈建刚)b, Hu Jun-Tao (胡俊涛)b 
a Structure Research Laboratory, University of Science and Technology of China, Hefei 230026, China; b Department of Physics, University of Science and Technology of China, Hefei 230026, China
Abstract  Various morphology ZnO submicrorods and microrods have been fabricated onto glass substrates through chemical solution growth by the source of zinc acetate (Zn(CH3COO)2$\cdot$2H2O) and hexamethylene tetraamine ((CH2)6N4). We discuss the influence of PH and the concentration of the solution on the shapes of the as-synthesized ZnO samples. And analyse the growth mechanism. The regular hexagonal ZnO rods align has been made by control of a certain concentration and proper PH. The hexagonal ZnO columns mainly grew in the [002] direction. X-ray diffraction (XRD), scanning electron microscopy (SEM) and photoluminescence (PL) are used to characterize the structure, the morphology and optical property of the samples. The photoluminescence spectrum of hexagonal ZnO columns shows that there are a broad strong red band (650nm) and a broad band in short wavelength which are two overlapped emission bands with the peaks at about 380nm and 430nm.The UV emission (~387nm) comes from recombination of free excitons. The blue emission with peak at 430nm is assigned for the recombination from an electron at interstitial Zn to a hole in VB. The red emission at 650nm is ascribed to the recombination from an electron at Vo2+ to a hole in VB.
Keywords:  ZnO      microrods      photoluminescence      crystallite growth      chemical solution method  
Received:  15 July 2004      Revised:  10 November 2004      Accepted manuscript online: 
PACS:  81.10.Dn (Growth from solutions)  
  78.55.Et (II-VI semiconductors)  
  78.40.Fy (Semiconductors)  
  61.05.cp (X-ray diffraction)  
  61.66.Fn (Inorganic compounds)  
Fund: Project supported by the Anhui Nature Science Foundation (Grant No 01044904) and the National Natural Science Foundation of China (Grant No 19874057).

Cite this article: 

Zhang Lin-Li (张琳丽), Guo Chang-Xin (郭常新), Chen Jian-Gang (陈建刚), Hu Jun-Tao (胡俊涛) The synthesis of one-dimensional controllable ZnO microrods 2005 Chinese Physics 14 586

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