Kar Soumitra, Dev Apurba, Chaudhuri Subhadra
DST Unit on Nano Science and Department of Materials Science, Indian Association for the Cultivation of Science, Kolkata 700 032, India.
J Phys Chem B. 2006 Sep 14;110(36):17848-53. doi: 10.1021/jp0629902.
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 approximately 6 microm 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.
通过以乙醇为溶剂的溶剂热法在锌箔上制备了氧化锌纳米片、纳米钉和排列良好的纳米棒。较低的合成温度和较短的时间有利于纳米片的形成。通过优化合成温度和时间，可以制备出具有六边形帽和长杆的氧化锌纳米钉。较高的温度不利于制备均匀光滑的纳米棒。当向溶剂中加入氢氧化钠时，制备出了直径在100-250纳米范围内、长度可达约6微米的排列良好的氧化锌纳米棒阵列。通过优化反应参数，可以调整纳米结构的形态、尺寸和取向。氧化锌纳米棒在室温下表现出激子强紫外发射和与缺陷相关的宽绿色发射。与缺陷相关的绿色发射带随着纳米棒排列程度的提高而降低。
