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Surface morphology and growth mechanism of catalyst‐free ZnO and Mgx Zn1–x O nanorods |
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| Authors: | Miyoung Kim Young Joon Hong Jinkyoung Yoo Gyu‐Chul Yi Gyeong‐Su Park Ki‐jeong Kong Hyunju Chang |
| Affiliation: | 1. Department of Materials Science and Engineering, Seoul National University, Seoul 151‐744, Korea;2. National CRI Center for Semiconductor Nanorods and Department of Materials Science and Engineering, POSTECH, Pohang, Gyeongbuk 790‐784, Korea;3. Samsung Advanced Institute of Technology, P.O. Box 111, Suwon 440‐600, Korea;4. Korea Research Institute of Chemical Technology, P.O. Box 107, Yuseong, Daejeon 305‐600, Korea |
| Abstract: | High‐resolution transmission electron microscopy was employed to investigate morphologies and catalyst‐free growth mechanism of ZnO/Mgx Zn1–x O ‘multi‐quantum well’ and ‘core‐shell’ nanorod heterostructures as well as ZnO nanorods. The one‐dimensional growth mechanism and the hexagonal faceting of ZnO nanorod were explained by the surface energy anisotropy. The morphology change by alloying with Mg was successfully explained by investigating the energy gain by adatom adsorption and the reduction in the surface energy anisotropy. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim) |
| Keywords: | 61.46.Km 68.37.Og 68.65.Fg 71.15.Nc 81.07.St |