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ZnO nanocones: Solvothermal synthesis and photoluminescence properties |
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| Authors: | Tandra Ghoshal Soumitra Kar Jay Ghatak Subhadra Chaudhuri |
| Affiliation: | 1. Department of Materials Science, Indian Association for the Cultivation of Science, Kolkata 700032, India;2. Institute of Physics, Bhubaneswar 751005, India;1. Materials Research Centre, Indian Institute of Science, Bangalore 560012, India;3. Centre for Nano Science and Engineering, Indian Institute of Science, Bangalore 560012, India;3. Department of Materials Science and Engineering, National Cheng Kung University, Tainan 701, Taiwan;1. Dep. Eng. Metalúrgica e de Materiais, Universidade Federal do Ceará, Campus do Pici Bloco 714, 60455-760 Fortaleza, CE, Brazil;2. Institut Català de Nanociència i Nanotecnologia, Campus de la UAB, Edifici ICN2 08193 Bellaterra, BCN, Spain |
| Abstract: | Ellipsoidal and prism shaped ZnO nanocrystals with hexagonal cross-sections have been synthesized by a simple solvothermal process. The ellipsoidal ZnO nanocrystals possessed a unique hexagonal cross-section having two sharp pointed ends and a flattened central part. The well faceted prism like particles resembled hexagonal cones in their shape. Dimensions of the nanocrystals increased systematically with the increase in the synthesis temperature. The synthesized nanocrystals exhibited near band edge UV emission centered at ～400 nm. An additional defect related green emission band at ～500 nm was observed from the samples synthesized at higher temperatures. |
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