کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5364421 | 1388316 | 2009 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Growth and properties of ZnO nanorod and nanonails by thermal evaporation Growth and properties of ZnO nanorod and nanonails by thermal evaporation](/preview/png/5364421.png)
ZnO nanorods and nanonails have been synthesized on silicon wafers by a three-step catalyst-free thermal evaporation method in oxygen atmosphere. All the samples were hexagonal phase ZnO with highly c-axis preferential orientation. Different morphologies of ZnO nanostructures, i.e. ZnO nanorods and two kinds of nanonails, were observed at various temperature regions. Photoluminescence, transmission electron microscopy, and energy-dispersive X-ray spectroscope were employed to elucidate the reason for the formation of such different rod-like structures. The analysis results demonstrated that the caps of nanonails possess a large number of oxygen vacancies, which may play a key role in determining the formation of nanonails and the high intensity of green emission.
Journal: Applied Surface Science - Volume 255, Issue 7, 15 January 2009, Pages 3972-3976