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首页玻璃基底上水溶液法制备定向ZnO纳米棒阵列
玻璃基底上水溶液法制备定向ZnO纳米棒阵列
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更新于2024-09-04
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本文报道了一项关于在玻璃衬底上通过水溶液法制备高精度对齐的氧化锌(ZnO)纳米棒阵列的研究,由杨梅、尹光福、黄忠兵等人进行。研究团队利用硝酸锌(Zn(NO3)2•6H2O)和六次甲基四胺(C6H12N4, HMT)作为主要原料,探索了生长过程中关键参数如种子层、溶液浓度以及反应时间的影响。 首先,文章强调了种子层在实现ZnO纳米棒有序生长中的关键作用。通过实验发现,如果没有预先形成ZnO种子层,纳米棒的排列将难以保持对齐。这表明种子层的存在对于控制晶体生长方向至关重要。 其次,研究者发现通过调整水溶液的浓度,可以调控ZnO纳米棒的长度,使其在2至3微米范围内变化。这意味着这项技术具有潜在的应用价值,可以根据具体需求定制不同长度的纳米棒结构。 X射线衍射(XRD)的结果进一步证实,制得的ZnO纳米棒主要呈现 wurzite 结构,且优先沿c轴方向生长,这有助于理解其晶体学特性,并为优化生长条件提供了科学依据。 扫描电子显微镜(SEM)的微观观察结果显示,ZnO纳米棒垂直于基底生长,显示出良好的结晶质量和高度的定向性,这对于许多应用领域,如光电转换、传感器和透明导电材料,都是非常重要的结构特征。 关键词包括ZnO纳米棒阵列、结构、形态以及水溶液法制备,这些都是研究的核心内容。这篇首发论文揭示了一种新颖且可控的方法,用于在玻璃衬底上制备高质量的ZnO纳米棒,这将推动相关领域的科学研究和实际应用发展。
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Well-aligned ZnO rod arrays grown on glass substrate
from aqueous solution
Mei Yang, Guangfu Yin, Zhongbing Huang
*
, Xiaoming Liao, Yunqing Kang, Yadong Yao,
College of Materials Science and Engineering, Sichuan University, Chengdu 610064, China
Email:
zbhuang@iccas.ac.cn
Abstract
Well-aligned ZnO rod arrays have been successfully synthesized on glass substrate
from the aqueous solution of Zn(NO
3
)
2
·6H
2
O and C
6
H
12
N
4
(HMT). Some critical
issues such as seed layers, concentration and reaction time are investigated. The
results show that ZnO seeds layers were pre-requisite for the aligned growth of ZnO
rod arrays. The length of rods is tunable in a range from 2~3 µm by varying the
solution concentration and reaction time. X-ray diffraction results demonstrate that
ZnO rods are wurtzite crystal structures preferentially orienting in the direction of the
c-axis. Microstructure observation by Scanning Electron Microscope confirms that
ZnO rods grew up perpendicular to the substrate.
Keywords: ZnO rod arrays; Structure; Morphology; Aqueous solution
1 Introduction
ZnO, a typical II–VI group compound semiconductor, is an excellent electronic and photonic material
due to the wide direct band gap (3.37 eV) and large exciton binding energy (60 meV) [1]. At the present,
ZnO nanomaterials have been widely studied for high-technology applications such as photonic crystals,
light-emitting diodes, transparent conductive coating [2], electrode for dye-sensitized solar cells [3], gas
sensors [4], and electro-and photo-luminescent material [5]. A variety of ZnO nanostructures such as
nanowires, rods, nanotubes, nanobelts, and nanoflowers have been reported so far. Recently, ZnO rod
arrays attract worldwide interests due to their electrical and optical properties [1].
Various techniques such as metal–organic chemical vapor deposition [6], vapor–liquid–solid epitaxial
mechanism [7], pulsed laser deposition [8], spray pyrolysis [9], epitaxial electrodeposition [10], and
radiofrequency magnetron sputtering [11] have been developed for the preparing of well-oriented ZnO rod
arrays. However, the methods be mentioned above demand reaction conditions such as high temperatures
and low or high pressures. These conditions go against large-scale production of this material. Therefore,
hitherto, fabrication of well-aligned ZnO rod arrays over a large substrate area is still very challenging [12].
On the other hand, solution-based method reported by Lionel Vayssieres [13, 14] proves to be a
cost-effective, less hazardous and environmentally friendly methodology for fabrication of large-scale
aligned ZnO rods at remarkably low temperature. ZnO rods with various microstructure parameters can be
obtained simply by changing the precursor chemicals, the concentration, and the growth temperature and
time [15].
-1-
http://www.paper.edu.cn rrrr
中国科技论文在线
The support of Sichuan University through a Young Science Research Fund (JS20070406506415) and Key Technologies Research
and Development Program of Sichuan Province (2006Z08-001-1) is acknowledged with gratitude. This work was also supported by
the Specialized Research Fund for the Doctoral Program of Higher Education from Ministry of Education of China (20070610131).
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