...
首页> 外文期刊>Japanese journal of applied physics >Size effect of Raman scattering on CeO2 nanocrystal by hydrothermal method
【24h】

Size effect of Raman scattering on CeO2 nanocrystal by hydrothermal method

机译:水热法拉曼散射对CeO2纳米晶体的尺寸效应

获取原文
获取原文并翻译 | 示例
           

摘要

In this study, we prepared surface-modified CeO2 nanocrystals (NCs) by a hydrothermal method, and calcined CeO2 NCs at various temperatures between 400 and 1000 degrees C for 3 h in air to obtain crystal-size-controlled CeO2 NCs. We investigated the correlation between the Raman spectra and the crystal sizes of the CeO2 powder. The peak position of the F-2g mode of CeO2 was shifted to lower energies as the crystal size decreased and the peak broadened. The present hydrothermally driven CeO2 NCs showed no change in lattice constant depending on crystal size after heat treatment. The Raman peak position of the F-2g mode as a function of inverse CeO2 crystal size corresponded to the models for phonon confinement without the combination of strain and defect effects. Moreover, it was also suggested that the Raman peak width of CeO2 NCs without strain also showed dependence on particle size. (C) 2017 The Japan Society of Applied Physics
机译:在这项研究中,我们通过水热法制备了表面改性的CeO2纳米晶体(NCs),并在空气中在400至1000摄氏度之间的各种温度下煅烧了CeO2 NCs 3小时,从而获得了晶体大小可控的CeO2 NCs。我们研究了拉曼光谱与CeO2粉末晶体尺寸之间的相关性。随着晶体尺寸的减小和峰的加宽,CeO2的F-2g模式的峰位置移至较低的能量。目前的水热驱动的CeO2 NCs在热处理后没有显示出取决于晶体尺寸的晶格常数变化。 F-2g模的拉曼峰位置与CeO2晶体晶体的倒数成函数,对应于声子约束模型,没有应变和缺陷效应的结合。此外,还提示没有应变的CeO2 NCs的拉曼峰宽也显示出对粒度的依赖性。 (C)2017日本应用物理学会

著录项

  • 来源
    《Japanese journal of applied physics》 |2017年第1s期|01AE06.1-01AE06.6|共6页
  • 作者单位

    Nagoya Univ, Grad Sch Engn, Dept Mat Sci & Engn, Nagoya, Aichi 4648603, Japan;

    Nagoya Univ, Inst Mat & Syst Sustainabil, Nagoya, Aichi 4648603, Japan;

    Nagoya Univ, Inst Mat & Syst Sustainabil, Nagoya, Aichi 4648603, Japan;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号