A low-temperature evaporation route for ZnO nanoneedles and nanosaws

被引:20
作者
Fan, HJ
Scholz, R
Dadgar, A
Krost, A
Zacharias, M
机构
[1] Max Planck Inst Microstruct Phys, D-06120 Halle An Der Saale, Germany
[2] Univ Magdeburg, Inst Expt Phys, D-39016 Magdeburg, Germany
来源
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2005年 / 80卷 / 03期
关键词
D O I
10.1007/s00339-004-3080-5
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
A low-temperature (550 degreesC) catalyst-free route has been applied to fabricate ZnO nanoneedles and nanosaws via evaporation of metallic Zn powder. The nanoneedles are vertically aligned on GaN(0001)/Si(111) substrates. Based on electron-microscopy observations, we postulate that the needles grew from the closely stacked ZnO columnar grains, which were formed with [0001] texture in an early stage. The uniquely shaped ZnO nanosaws were found in a large quantity under a similar low-temperature growth condition. In addition, single-crystalline micrometer saws were also obtained under an increased Zn vapor supersaturation by changing the sample configuration.
引用
收藏
页码:457 / 460
页数:4
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