کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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611809 | 880685 | 2007 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Low-temperature growth of ZnO nanorods by chemical bath deposition Low-temperature growth of ZnO nanorods by chemical bath deposition](/preview/png/611809.png)
Aligned ZnO nanorod arrays were synthesized using a chemical bath deposition method at normal atmospheric pressure without any metal catalyst. A simple two-step process was developed for growing ZnO nanorods on a PET substrate at 90–95 °C. The ZnO seed precursor was prepared by a sol–gel reaction. ZnO nanorod arrays were fabricated on ZnO-seed-coated substrate. The ZnO seeds were indispensable for the aligned growth of ZnO nanorods. The ZnO nanorods had a length of 400–500 nm and a diameter of 25–50 nm. HR-TEM and XRD analysis confirmed that the ZnO nanorod is a single crystal with a wurtzite structure and its growth direction is [0001] (the c-axis). Photoluminescence measurements of ZnO nanorods revealed an intense ultraviolet peak at 378.3 nm (3.27 eV) at room temperature.
FE-SEM images of aligned ZnO nanorods on PET substrate: (a) ZnO nanorods without seeds (plain view, low magnification); (b) ZnO nanorods with seeds (plain view, low magnification); (c) ZnO nanorods on seeds (cross-section). Nucleation of ZnO nanorod on ZnO seeds has a low free energy barrier of activation than on bare substrate. So, the ZnO seeds were indispensable for the aligned growth of ZnO nanorod.Figure optionsDownload as PowerPoint slide
Journal: Journal of Colloid and Interface Science - Volume 313, Issue 2, 15 September 2007, Pages 705–710