Simple solvothermal route to synthesize ZnO nanosheets, nanonails, and well-aligned nanorod arrays
Simple solvothermal route to synthesize ZnO nanosheets, nanonails, and well-aligned nanorod arrays
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DOI：
10.1021/jp0629902
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发表时间：
2006-09-14
影响因子：
3.3
通讯作者：
Chaudhuri, Subhadra
中科院分区：
文献类型：
--
作者：
Kar, Soumitra;Dev, Apurba;Chaudhuri, Subhadra
以乙醇为溶剂，采用溶剂热法在锌箔上制备了ZnO纳米片、纳米钉和排列良好的纳米棒。较低的合成温度和较短的合成时间有利于纳米片的形成。通过优化合成温度和合成时间，可以制备出具有六角形帽和长茎的ZnO纳米钉。较高的温度不利于制备均匀光滑的纳米棒。当溶剂中加入NaOH时，可以得到直径在100-250 nm之间，长度接近6 μ m的排列良好的ZnO纳米棒阵列。通过优化反应参数，可以定制纳米形态、尺寸和取向。ZnO纳米棒在室温下表现出强激子紫外发射和缺陷相关的宽绿色发射。缺陷相关的绿色发射带随着纳米棒对准度的提高而减小。
ZnO nanosheets, nanonails, and well-aligned nanorods were fabricated on Zn foils by a solvothermal approach using ethanol as the solvent. A lower synthesis temperature and a shorter time period favor the formation of nanosheets. By optimizing the synthesis temperature and time period, ZnO nanonails with a hexagonal cap and a long stem could be produced. A higher temperature was not favorable to produce uniform and smooth nanorods. Well-aligned ZnO nanorod arrays were produced with diameters within 100-250 nm and lengths up to similar to 6 mu m when NaOH was added to the solvent. By optimizing the reaction parameters, the morphology, size, and orientation of the nanoforms could be tailored. The ZnO nanorods exhibit an excitonic strong UV emission and a defect-related broad green emission at room temperature. The defect-related green emission band decreased with the improvement of the degree of alignment of the nanorods.