Journal of Jishou University(Natural Sciences Edition)

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Quantitative Raman Spectrum Analysis of Nanoparticle CeO2 Bond Relaxation

YANG Xuexuan,YANG Hong,LIAO Wenhu,YE  Fuqiu,PENG Jinzhang,LI Lihua   

  1. (1.College of Physics and Electromechanical Engineering,Jishou University,Jishou 416000,Hunan China;2.Key Laboratory of Clean Mineral Production and Green Functional Material Development in Hunan Province,Jishou University,Jishou 416000,Hunan China;3.Zhijiang Normal School,Huaihua 418000,Hunan China)
  • Online:2016-07-25 Published:2016-07-19


The atomic structure and bond relaxation of Nanoparticle CeO2 determine its applications.From the perspective of chemical bonds relaxation and vibration,and with phonons spectroscopy measurement technique,the physical mechanism of the Raman spectrum pressure effect is explored. Based on the theory of bond relaxation,the Raman spectrum pressure effect of nanoparticle CeO2 is quantitatively analyzed. The functional relationship between phonon spectrum and pressure is established. At the same time,the bulk modulus and compressibility coefficient are evaluated. The physical causes of Raman frequency-shift and blue-shift of CeO2 are explored,and it is found that pressure increase prompts contraction of bond length and bond energy enhancement leads to blue-shift of Raman spectrum.

Key words: CeO2, Raman spectrum, pressure, blue-shift

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