%0 Journal Article
%T Synthesis and Luminescent Properties of Planar-tip and Tapered-tip ZnO Nanorod Arrays<br>
%A Chun-wen WANG
%A Jr-hau HE
%A Lih-juann CHEN
%A <br>
%J 材料科学技术学报
%D 2008
%I 
%X Vertically aligned ZnO nanorods were synthesized on a-plane sapphire via a metal catalyzed vapor phase transport and condensation process in a two-zone vacuum furnace. Planar-tip and tapered-tip ZnO nanorods were successfully synthesized by utilizing different source materials under the same growth conditions. The growth mechanisms were proposed to be vapor-liquid-solid (VLS) process for planar-tip ZnO nanorods and a combination of VLS and self-catalyzed processes for tapered-tip ZnO nanorods. From cathodoluminescence (CL) measurements, tapered-tip ZnO nanorods have more intense green emission than planar-tip ZnO nanorods, and therefore possess higher oxygen vacancy concentration than planar-tip ZnO nanorods. From CL characteristics, well-aligned planar-tip ZnO nanorods shall serve effectively as laser source, while well-aligned tapered-tip ZnO nanorods are suitable for direction-related optical applications.
%K ZnO
%K WeB-aligned
%K Nanorods
%K Cathodoluminescence<br>
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=5B3AB970F71A803DEACDC0559115BFCF0A068CD97DD29835&cid=84529CA2B2E519AC&jid=324DC3CAB22330DB19158AE0A9B7BFA5&aid=9543E3F3CCBDD443214B3A063F00D412&yid=67289AFF6305E306&vid=B91E8C6D6FE990DB&iid=E158A972A605785F&sid=06F643376BC2509E&eid=9BF3B0483F192149&journal_id=1005-0302&journal_name=材料科学技术学报&referenced_num=0&reference_num=25