標題: | Low-temperature solution approach toward highly aligned ZnO nanotip arrays |
作者: | Hung, CH Whang, WT 材料科學與工程學系 Department of Materials Science and Engineering |
關鍵字: | low dimensional structures;growth from solutions;ZnO |
公開日期: | 15-Jul-2004 |
摘要: | Highly aligned and free-standing ZnO nanotip arrays grown on the ZnO films by soft chemical method are proposed. X-ray diffraction analysis shows that the ZnO nanotips are hexagonal wurtzite structure, and the c-axes of nanotips are perfectly along the substrate surface normal. HRTEM demonstrates the ZnO nanotip to be a single crystal. Room temperature photoluminescence of the ZnO nanotips has a strong UV emission band at 378 nm. The field emission of ZnO nanotip arrays shows a turn-on field of about 10.8 V/mum at a current density of 0.1 muA/cm and emission current density up to about 1 mA/cm(2) at a bias field of 19.5 V/mum. The mild technique for fabricating ZnO nanotip arrays is believed to open novel possibilities for nanoscale optoelectronic device applications. (C) 2004 Elsevier B.V. All rights reserved. |
URI: | http://dx.doi.org/10.1016/j.jcrysgro.2004.05.009 http://hdl.handle.net/11536/26564 |
ISSN: | 0022-0248 |
DOI: | 10.1016/j.jcrysgro.2004.05.009 |
期刊: | JOURNAL OF CRYSTAL GROWTH |
Volume: | 268 |
Issue: | 1-2 |
起始頁: | 242 |
結束頁: | 248 |
Appears in Collections: | Articles |
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