Phase Transition and Optical Properties for Ultrathin KNbO3 Nanowires
Fascicular KNbO3 nanowires with tetragonal perovskite structures and ultrasmall diameters are synthesized by hydrothermal route at about 150°C for 24 hours. The concentrations of medium alkalinity have influenced phase structures and the final morphologies of the products significantly by modifying...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2013-01-01
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| Series: | Advances in Condensed Matter Physics |
| Online Access: | http://dx.doi.org/10.1155/2013/567420 |
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| _version_ | 1832550633681453056 |
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| author | Shulin Yang Yongming Hu Shengfu Wang Haoshuang Gu Yu Wang |
| author_facet | Shulin Yang Yongming Hu Shengfu Wang Haoshuang Gu Yu Wang |
| author_sort | Shulin Yang |
| collection | DOAJ |
| description | Fascicular KNbO3 nanowires with tetragonal perovskite structures and ultrasmall diameters are synthesized by hydrothermal route at about 150°C for 24 hours. The concentrations of medium alkalinity have influenced phase structures and the final morphologies of the products significantly by modifying the conditions in process. The as-prepared KNbO3 nanowires exhibit three phase transitions at about 343, 454.7, and 623 K as the temperature increases from 250 to 700 K. The band gap is about 3.78 eV for KNbO3 nanowires. Photoluminescence study at room temperature reveals two visible light emission bands peaking at ~551 and 597 nm, respectively, which may be due to the oxygen vacancies, site niobium (occupy the location of Nb), and antisite niobium (occupy the location of K) in KNbO3 nanowires. |
| format | Article |
| id | doaj-art-7fb32e1f91f5404d884a8a442a10d5e0 |
| institution | Kabale University |
| issn | 1687-8108 1687-8124 |
| language | English |
| publishDate | 2013-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Condensed Matter Physics |
| spelling | doaj-art-7fb32e1f91f5404d884a8a442a10d5e02025-02-03T06:06:15ZengWileyAdvances in Condensed Matter Physics1687-81081687-81242013-01-01201310.1155/2013/567420567420Phase Transition and Optical Properties for Ultrathin KNbO3 NanowiresShulin Yang0Yongming Hu1Shengfu Wang2Haoshuang Gu3Yu Wang4Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Key Lab of Ferro- & Piezo Materials and Devices of Hubei Province, Faculty of Physics & Electronic Technology, Hubei University, Wuhan 430062, ChinaHubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Key Lab of Ferro- & Piezo Materials and Devices of Hubei Province, Faculty of Physics & Electronic Technology, Hubei University, Wuhan 430062, ChinaHubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Key Lab of Ferro- & Piezo Materials and Devices of Hubei Province, Faculty of Physics & Electronic Technology, Hubei University, Wuhan 430062, ChinaHubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Key Lab of Ferro- & Piezo Materials and Devices of Hubei Province, Faculty of Physics & Electronic Technology, Hubei University, Wuhan 430062, ChinaDepartment of Applied Physics, The Hong Kong Polytechnic University, Hong KongFascicular KNbO3 nanowires with tetragonal perovskite structures and ultrasmall diameters are synthesized by hydrothermal route at about 150°C for 24 hours. The concentrations of medium alkalinity have influenced phase structures and the final morphologies of the products significantly by modifying the conditions in process. The as-prepared KNbO3 nanowires exhibit three phase transitions at about 343, 454.7, and 623 K as the temperature increases from 250 to 700 K. The band gap is about 3.78 eV for KNbO3 nanowires. Photoluminescence study at room temperature reveals two visible light emission bands peaking at ~551 and 597 nm, respectively, which may be due to the oxygen vacancies, site niobium (occupy the location of Nb), and antisite niobium (occupy the location of K) in KNbO3 nanowires.http://dx.doi.org/10.1155/2013/567420 |
| spellingShingle | Shulin Yang Yongming Hu Shengfu Wang Haoshuang Gu Yu Wang Phase Transition and Optical Properties for Ultrathin KNbO3 Nanowires Advances in Condensed Matter Physics |
| title | Phase Transition and Optical Properties for Ultrathin KNbO3 Nanowires |
| title_full | Phase Transition and Optical Properties for Ultrathin KNbO3 Nanowires |
| title_fullStr | Phase Transition and Optical Properties for Ultrathin KNbO3 Nanowires |
| title_full_unstemmed | Phase Transition and Optical Properties for Ultrathin KNbO3 Nanowires |
| title_short | Phase Transition and Optical Properties for Ultrathin KNbO3 Nanowires |
| title_sort | phase transition and optical properties for ultrathin knbo3 nanowires |
| url | http://dx.doi.org/10.1155/2013/567420 |
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