Flowerlike ZnO nanostructures via hexamethylenetetramine-assisted thermolysis of zinc-ethylenediamine complex
Flowerlike ZnO nanostructures via hexamethylenetetramine-assisted thermolysis of zinc-ethylenediamine complex
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DOI：
10.1021/jp046267s
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发表时间：
2005-01-27
影响因子：
3.3
通讯作者：
Yu, WD
中科院分区：
文献类型：
--
作者：
Gao, XD;Li, XM;Yu, WD
采用六亚甲基四胺（HMT）辅助锌-乙二胺（en）络合物热处理，在低温（95 ℃）和短时间（60 min）条件下，在Si衬底上制备了花状ZnO纳米结构（FZN）。所得的FZNs具有明确的花状形态，六方纤锌矿结构，和强的紫外光致发光。由许多排列良好的纳米棒构成的花瓣具有典型的锥形特征，尖端尺寸为30-50 nm。恩的影响。锌-en摩尔比。HMT和反应时间进行了研究。结果表明，en对FZN的形成起决定性作用，NH3的部分封端也起决定性作用。（CH2）（2）（NH3）-N-。ZnO晶体侧表面上的分子负责花瓣的锥形特征。HMT可以介入ZnO的成核过程，通过阻止非均匀沉淀来抑制ZnO在衬底上形成纳米棒。而且。在低前体浓度下形成孪晶ZnO核以及它们进一步演化为具有清晰中间界面的纺锤体晶体对于FZN的发展也是至关重要的。
Flowerlike ZnO nanostructures (FZNs) have been deposited on Si substrate from aqueous solution by the hexamethylenetetramine (HMT)-assisted thermolysis of zinc-ethylenediamine (en) complex at low temperature (95 degreesC) and in a short time (60 min). Obtained FZNs exhibit well-defined flowerlike morphology, hexagonal wurtzite structure, and strong UV photoluminescence. The flower petals constructed by many well-aligned nanorods possess the typical tapering feature with tip sizes of 30-50 nm. Effects of en. zinc-en molar ratio. HMT, and reaction time were investigated. Results show that en is determinative to the formation of FZNs, and the partial capping of NH3.(CH2)(2)(NH3)-N-. molecules on the side surface of the ZnO crystal is responsible for the tapering feature of petals. HMT can step into the nucleation process of ZnO and inhibit the formation of nanorods on the substrate by preventing heterogeneous precipitation. Moreover. the formation of twin crystal ZnO nuclei at low precursor concentrations and their further evolution into spindle crystals with clear middle interfaces are also vitally important for the development of FZNs.