Large-Scale Growth of Highly Oriented ZnO Nanorod Arrays in the Zn-NH3·H2O Hydrothermal System
Large-Scale Growth of Highly Oriented ZnO Nanorod Arrays in the Zn-NH3·H2O Hydrothermal System
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DOI：
10.1021/cg060890f
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发表时间：
2008-02
影响因子：
3.8
通讯作者：
Heqing Yang;Yuzhe Song;Li Li-Li;Junhu Ma;Dichun Chen;Shu Mai;Hangyue Zhao
中科院分区：
文献类型：
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作者：
Heqing Yang;Yuzhe Song;Li Li-Li;Junhu Ma;Dichun Chen;Shu Mai;Hangyue Zhao
通过锌箔与氨水在100 °C下的简单水热反应，在锌箔上直接生长大规模高度取向的ZnO纳米棒阵列。用X射线衍射、扫描电镜和透射电镜对产物进行了表征。结果表明，ZnO纳米棒为纤锌矿结构，沿[0001]方向生长，直径在250-100 nm之间，长度可控制在4.0 μm以内。氨在ZnO纳米棒阵列的形成中起着关键作用，并提出了一种可能的机制来解释ZnO纳米棒阵列的生长。ZnO纳米棒阵列的紫外发射峰位于396 nm，蓝绿色发射峰位于488 nm。紫外和蓝色绿色发射被认为分别来自激子跃迁和氧空位与间隙氧之间的跃迁。此外，紫外线和蓝绿色的发射率也比紫外线低。
Large-scale highly oriented ZnO nanorod arrays were directly grown on zinc foil through a simple hydrothermal reaction of Zn foil with aqueous ammonia at 100 °C. The products were characterized with X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. It was found that the ZnO nanorods were single crystalline with the wurtzite structure and grown in the [0001] direction, and have a controllable diameter in the range of 250–100 nm with lengths of up to 4.0 µm by varying the growth time. The ammonia plays a key role in the formation of ZnO nanorod arrays, and a possible mechanism is also proposed to account for the growth of the ZnO nanorod arrays. The ZnO nanorod arrays exhibited a UV emission with peak at 396 nm and a blue green emission with a peak at 488 nm. The UV and blue green emissions are considered to originate from the exciton transition and the transition between the oxygen vacancy and interstitial oxygen, respectively. In addition, the UV and blue green emissio...