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江苏大学 光子制造科学与技术江苏省重点实验室,江苏 镇江,212013
收稿日期:2008-12-08,
修回日期:1900-01-02,
网络出版日期:2009-10-30,
纸质出版日期:2009-10-30
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周 明, 冯程程, 吴春霞, 等. 定向ZnO纳米钉阵列的制备及生长机理[J]. 发光学报, 2009,30(5):717-721.
ZHOU Ming, FENG Cheng-cheng, WU Chun-xia, et al. Preparation and Growth Mechanism of Well-aligned ZnO Nanonails Synthesized by Chemical Vapor Deposition[J]. Chinese journal of luminescence, 2009, 30(5): 717-721.
在550 ℃下
采用化学气相沉积(CVD)法在镀Au(10 nm)的Si(100)衬底上
制备了ZnO一维纳米钉阵列结构。X射线衍射(XRD)谱图中只显示了(002)衍射峰
其半峰全宽为0.166°
表明制备的纳米钉阵列具有高度c轴择优生长取向的特点和较高的结晶质量
高分辨透射电子显微镜(HRTEM)和选区电子衍射图(SAED)谱的结果表明所得到的单根纳米钉为沿(002)生长的单晶结构;同时
对一维纳米钉阵列的生长机理进行了分析。结果表明:由于Si与ZnO之间大的晶格失配度
首先在Si表面沉积一层富Zn的ZnO
x
薄膜缓冲层
然后通过VLS机理中的底端生长模式生长成为纳米钉阵列结构。
Well-aligned ZnO nanonails were synthesized on Au coated Si(100) substrates via chemical vapor deposition(CVD) method at 550 ℃. The presence of only (002) diffraction peak and its corresponding FWHM of 0.166° in the XRD patterns indicated that the ZnO nanonails exhibited (002) preferred orientation and good crystal quality. HRTEM and SAED results showed that the ZnO nanonails are single-crystal. Growth mechanism of the ZnO nanonails was also presented. The results showed that due to the large lattice mismatch between ZnO and Si
ZnO
x
buffer layer is firstly deposited on Si substrate
and then ZnO nanonails are grown perpendicularly on the substrate by VLS mechanism.
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