Morphology, structures and properties of ZnO nanobelts fabricated by Zn-powder evaporation without catalyst at lower temperature

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• 作者：Yunhua Huang ; Jian He ; Yue Zhang ; Ying Dai ; Yousong Gu ; Sen Wang and Cheng Zhou
• 刊名：Journal of Materials Science
• 出版年：2006
• 出版时间：May 2006
• 年：2006
• 卷：41
• 期：10
• 页码：3057-3062
• 全文大小：653 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Characterization and Evaluation Materials
  Polymer Sciences
  Continuum Mechanics and Mechanics of Materials
  Crystallography
  Mechanics
  
• 出版者：Springer Netherlands
• ISSN：1573-4803

文摘

Uniform ZnO normal nanobelts and toothed-nanobelts have been successfully synthesized respectively through pure zinc powder evaporation without catalyst at 600°C. Experimental results indicate that the key to the fabricating method is to control the gas flow rates and the partial pressures of argon, oxygen and zinc vapor. Scanning electron microscopy and high-resolution transmission electron microscopy observations show that the ZnO nanobelts have several types of single crystalline morphology. HRTEM images reveal that there are numerous screw dislocations and the growth is around the dislocations in the toothed-nanobelts. The growth of ZnO nanobelts is controlled by vapor-solid and screw dislocation mechanisms. Room temperature photoluminescence spectra of the toothed-nanobelts showed a UV emission at ～390 nm and a broad green emission with 4 subordinate peaks at 455–495 nm.