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反应时间对球状及棒状ZnO纳米晶的影响

Influence of Reaction Time on Spherical and Rod-like ZnO Nanocrystals
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摘要 本实验采用溶液法合成球状及棒状ZnO纳米晶。X射线衍射分析(XRD)显示合成的纳米晶为六方纤锌矿结构ZnO。紫外可见光(UV-vis)光谱和透射电镜(TEM)图表明通过改变反应时间可以控制ZnO纳米棒的长度。随着反应时间从90min延长到360min,纳米棒的长度可以从25nm长大到60nm。同时,纳米晶的室温光致发光谱(PL)具有强烈的近带边发射,在LED和LD等光电器件上有一定的应用前景。 Spherical and rod-like ZnO nanocrystals have been prepared by solution based method in this paper.The X-ray diffraction（XRD） pattern of the nanocrystals matches well with that of bulk wurtzite type of ZnO.Ultraviolet-visible（UV-vis） and transmission electron microscopy（TEM） analysis indicate that the length of ZnO nanorods can be well controlled by the reaction time.The length of ZnO nanorods increases from 25nm to 60nm as reaction time increases from 90min to 360min.In addition,ZnO nanocrystals exhibit strong intensity near bound-excitation emissions in the PL spectra at room temperature,which has potential applications in optoelectronic devices such as LED and LD.
作者 王庆玲 朱帅 屠瑶 金一政 叶志镇
机构地区 浙江大学硅材料国家重点实验室
出处 《材料科学与工程学报》 CAS CSCD 北大核心 2010年第4期494-497,共4页 Journal of Materials Science and Engineering
基金 国家自然科学基金资助项目(50802085)
关键词 ZNO 纳米晶 溶液法 量子限域效应 ZnO nanocrystals solution method quantum confinement effect
分类号 TN304.2 [电子电信—物理电子学]
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材料科学与工程学报
2010年 第4期

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