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Nanopropeller arrays of zinc oxide

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2 Author(s)
Gao, Pu Xian ; School of Materials Science and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245 ; Wang, Zhong L.

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Polar surface dominated ZnO nanopropeller arrays were synthesized by a two-step high temperature solid-vapor deposition process. The axis of the nanopropellers is a straight nanowire along the c axis and enclosed by {21¯1¯0} surfaces, which grew first; the sixfold symmetric nanoblades are later formed along the crystallographic equivalent a axes (<21¯1¯0>) perpendicular to the nanowire; and the array is formed by epitaxial growth of nanoblades on the nanowire. The top surface of the nanoblade is the Zn terminated +c plane, showing surface steps and possible secondary growth of nanowires due to higher self-catalytic activity, while the back surface is the oxygen-terminated -c plane, which is smooth and inert. © 2004 American Institute of Physics.

Published in:

Applied Physics Letters  (Volume:84 ,  Issue: 15 )