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