ZnWO4 单晶衬底上ZnO 薄膜的晶核发育与形貌分析
首发时间:2006-06-28
摘要:ZnWO4 单晶的a晶面与氧化锌c晶面晶格匹配很好,是制备氧化锌薄膜的优良衬底。 本文采用溶胶-凝胶法在ZnWO4 单晶衬底上制备出透明的ZnO 薄膜。通过光学显微镜对薄膜晶核发育过程和形貌进行了详细的分析。实验结果表明:在结晶刚开始,系统将经历成核-长大的过程,随着生长过程的进行,在主晶轴上(一次轴)上又长出二次轴、三次轴等等,最后逐渐形成树枝状晶核。实验还对sol-gel 来制备单晶薄膜的可行性进行了分析。由于ZnO 晶核是在非平衡条件下生长的,在晶核发育过程中又出现了三种不同的生长形态——成核生长、枝晶生长和分形生长。
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Nucleation growth and morphology of ZnO film on ZnWO4
Abstract:The a cut of ZnWO4 crystal has wonderful match with c cut of ZnO crystal. So it could be used as substrate materials of ZnO films. In this paper, transparent ZnO films were prepared on ZnWO4 crystal by sol-gel technique. The nucleation and surface morphology of ZnO films were observed with optical microscope. The results show that the system would go through nucleation and growth at begin.With the process progressing, there were secondary axes, cubical axes and so on, and dendrite host were formed at last. Because ZnO crystal nucleus were grown under non-equilibrium condition, there were nucleation, dendrite, fractal three different growth morphology.
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No.7373299001151484****
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