A Large Quantity of ZnO Nanorods Grown at Room Temperature
| Autor: | S.-Y. Seo, B.-H. Kim, Chul-Hyun Park, S. H. Park, S. H. Kim, Sang-Wook Han, Yung Woo Park, C.-H. Kwak |
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| Rok vydání: | 2009 |
| Předmět: |
Materials science
Extended X-ray absorption fine structure Scanning electron microscope Analytical chemistry General Physics and Astronomy chemistry.chemical_element Zinc law.invention chemistry Transmission electron microscopy law Nanorod Selected area diffraction Crystallization Wurtzite crystal structure |
| Zdroj: | Journal of the Korean Physical Society. 55:94-97 |
| ISSN: | 0374-4884 |
| DOI: | 10.3938/jkps.55.94 |
| Popis: | High-quality ZnO nanorods were synthesized on stainless-steel substrates at room temperature in NaCl solutions with NaCl concentrations of 3.5 – 5.0 wt%. The ZnO nanorods were grown from a Zn film on a stainless-steel substrate in a NaCl solution without any extra process. Field-emission scanning electron microscopy images showed that the ZnO formed into rods with a uniform size at a NaCl concentration of 3.5 – 5.0 wt% while the ZnO became plates for NaCl concentration above 9 wt%. The mean sizes of the nanorods grown at 30 and 40 ◦C were about 100 and 70 nm, respectively. High-resolution transmission electron microscopy and selected area electron diffraction measurements demonstrated that the nanorods had a well-ordered wurtzite structure without any extra phase. Extended X-ray absorption fine structure measurements revealed that the initial Zn film on the stainless-steel substrate had a hexagonal close-packed structure and finally became nanorods with a wurtzite structure in a sea water environment. The zinc likely obtained oxygen from the solution, and Na and Cl− ions acted as catalysts for the ZnO crystallization. |
| Databáze: | OpenAIRE |
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