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Synthesis and Cathodoluminescence Study of Well-Aligned Planar-Tip and Tapered-Tip ZnO Nanorods

Journal Advances in Science and Technology (Volume 51)
Volume Disclosing Materials at the Nanoscale
Edited by P. VINCENZINI and G. MARLETTA
Pages 38-41
DOI 10.4028/www.scientific.net/AST.51.38
Online since October, 2006
Authors J.H. He, C.W. Wang, K.F. Liao, Lih Juann Chen
Keywords Cathodoluminescence, Nanorods, Zinc Oxide ZnO
Abstract Vertically aligned ZnO nanorods have been synthesized on a-plane sapphire via a metal catalyzed vapor phase transport and condensation process in a two-zone vacuum furnace. Planar-tip ZnO nanorods were synthesized using commercial ZnO and graphite powder as the source of Zn vapor controlled by a simple vapor-liquid-solid (VLS) process. On the other hand, tapered-tip ZnO nanorods were synthesized from pure ZnO powder governed by both VLS and vapor-solid processes. From room temperature cathodoluminescence measurements, planar-tip ZnO nanorods are applicable for room temperature UV nanolasers.
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