Network array of zinc oxide whiskers

作者：Chunxiang Xu, Xiao Wei Sun, B. J. Chen, Zhili Dong, M. B. Yu, X. H. Zhang, S. J. Chua · 发表于：Nanotechnology · 年份：2004 · DOI：10.1088/0957-4484/16/1/015 · 被引用次数：23 · 研究领域：ZnO doping and properties、Advanced Sensor and Energy Harvesting Materials、Nanomaterials and Printing Technologies

A zinc oxide (ZnO) whisker network array with sixfold symmetry was fabricated on ZnO-buffered (0001) sapphire substrate by the vapour-phase transport method using a mixture of zinc oxide and graphite powders as source materials and patterned gold as catalyst. From the ZnO buffer layer, hexagonal ZnO nanorods with identical in-plane structure grew epitaxially along the [0001] orientation to form vertical stems. The branches grew horizontally from six side-surfaces of the vertical stem along and other equivalent directions. Most whiskers were confined along the six preferential orientations and interconnected with each other to form a regular network structure. The growth mechanism is discussed.