On the growth mechanism and optical properties of ZnO multi-layer nanosheets
On the growth mechanism and optical properties of ZnO multi-layer nanosheets
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DOI：
10.1007/s00339-004-2933-2
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发表时间：
2004-12-01
影响因子：
2.7
通讯作者：
Christen, J
中科院分区：
文献类型：
--
作者：
Fan, HJ;Scholz, R;Christen, J
我们报告多层ZnO纳米片通过退火Zn多面体颗粒在纯O-2。所述结构包括具有以50 nm厚的多层片材终止的侧面的簇芯。发现纳米片是（0001）取向的单晶纤锌矿ZnO。通过研究早期的生长阶段，它似乎是通过树枝状ZnO纳米结构，在此期间的单晶性质和晶体取向的成熟过程中形成的片。Zn多面体微晶的快速氧化促进了成熟。我们还表明，适当的修改的氧化过程导致形成明确的树枝状纳米线。这些纳米结构材料的光学性质（光致发光和拉曼）进行了讨论。
We report multi-layer ZnO nanosheets obtained by annealing Zn polyhedral particles in pure O-2. The structure comprises a cluster core with side faces terminated with 50-nm-thick multi-layer sheets. The nanosheets were found to be (0001)-oriented single-crystalline wurtzite ZnO. By studying the early growth stages, it appears that the sheets form through a ripening process of dendritic ZnO nanostructures, during which the single-crystalline nature and crystallographic orientation are conserved. The ripening is promoted by the rapid oxidation of the Zn polyhedral microcrystals. We also show that appropriate modification of the oxidation process leads to the formation of well-defined dendritic nanowires. The optical properties (photoluminescence and Raman) of these nanostructured materials are discussed.