Two-dimensional dendritic ZnO nanowires from oxidation of Zn microcrystals

Hong Jin Fan; Scholz, Roland; Kolb, Florian M.; Zacharias, Margit
November 2004
Applied Physics Letters;11/1/2004, Vol. 85 Issue 18, p4142
Academic Journal
Spontaneous formation of ZnO dendritic nanowires has been achieved on the faceted surfaces of polyhedral Zn microcrystals by oxidizing the latter at 600 °C. Electron microscopy investigations reveal that all the dendritic branches are elongated in <11–20> directions within the ±(0001) primary planes, forming two-dimensional web-like structure. Homoepitaxial interconnections are observed at the branch-to-arm and branch-to-branch regions, and the whole dendrites are wurtzite single crystals. The growth process of the dendritic nanowires is discussed, which is proposed to be a combination of “self-catalytic liquid–solid” and vapor–solid process.


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