Enhanced density control of ai:Zno nanowires via one-by-one coupling of nanowires and pyramids

Chien Lin Kuo, Yu Han Liang, Jun Hang Huang, Ruey Chi Wang, Jow Lay Huang, Hong Ren Chang, Chuan Pu Liu

研究成果: Article同行評審

1 引文 斯高帕斯(Scopus)

摘要

Al doped ZnO nanowire arrays with controlled growth densities were fabricated on silicon without using catalysts via sputtering followed by thermal chemical vapor deposition (CVD). Scanning electron microscopy and high-resolution transmission electron microscopy results show that the AhZnO single-crystalline nanowires synthesized by CVD prefer growing epitaxially on the tips of the ZnO pyramids pre-synthesized by sputtering with the c-axis perpendicular to the substrate. Consequently, the densities of the as-grown AhZnO nanowires were controllable by changing the particle densities of the pre-grown ZnO seed layers. The Al concentration of the AhZnO nanowires were measured to be around 2.63 at.% by electron energy loss spectrum. Field-emission measurements show the turn-on fields of the AI:ZnO nanowire arrays with controllable area densities are tunable. Room-temperature cathodoluminescence spectra of the AI:ZnO nanowires show relatively strong and sharp ultraviolet emissions centered at 383 nm and broad green emissions at around 497 nm. This work provides a simple method to control the field emission and luminescence densities of Al doped ZnO nanowire arrays, which also shows good potential for developing nano-pixel optical devices.

原文English
頁(從 - 到)893-897
頁數5
期刊Journal of Nanoscience and Nanotechnology
10
發行號2
DOIs
出版狀態Published - 2010 二月

All Science Journal Classification (ASJC) codes

  • 生物工程
  • 化學 (全部)
  • 生物醫學工程
  • 材料科學(全部)
  • 凝聚態物理學

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