| 纳米CeO2键弛豫动力学的计量拉曼谱分析 |
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| 引用本文： | 杨学弦,杨红,廖文虎,叶伏秋,彭金璋,李丽华.纳米CeO2键弛豫动力学的计量拉曼谱分析[J].吉首大学学报(自然科学版),2016,37(4):11-13,18. |
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| 作者姓名： | 杨学弦 杨红 廖文虎 叶伏秋 彭金璋 李丽华 |
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| 作者单位： | （1.吉首大学物理与机电工程学院,湖南 吉首 416000；2.吉首大学矿物清洁生产与绿色功能材料开发湖南省重点实验室，湖南 吉首 4160003.芷江师范学校，湖南 怀化 418000） |
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| 基金项目： | 湖南省自然科学基金资助项目(2015JJ6094);湖南省教育厅科学研究项目(15B189,14C0939);吉首大学引进人员科研资助经费研究项目(JSDXRCYJKYXM201310) |
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| 摘 要： | 纳米CeO2的原子结构变化和键弛豫作用决定了其应用领域.从化学键弛豫及振动的角度出发，利用声子计量谱学技术，探讨拉曼光谱压强效应背后的物理机制.应用键弛豫理论，对纳米CeO2的拉曼光谱压强效应进行定量分析；建立声子谱与压强的函数关系,求取体模量和压缩系数；阐述纳米CeO2拉曼频移蓝移的物理起因，即压强增大促使CeO2键长收缩、键能增强，引起拉曼谱发生蓝移现象.
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| 关 键 词： | CeO2 拉曼光谱 压强 蓝移 |
Quantitative Raman Spectrum Analysis of Nanoparticle CeO_2 Bond Relaxation |
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| YANG Xuexuan;YANG Hong;LIAO Wenhu;YE Fuqiu;PENG Jinzhang;LI Lihua.Quantitative Raman Spectrum Analysis of Nanoparticle CeO_2 Bond Relaxation[J].Journal of Jishou University(Natural Science Edition),2016,37(4):11-13,18. |
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| Authors: | YANG Xuexuan;YANG Hong;LIAO Wenhu;YE Fuqiu;PENG Jinzhang;LI Lihua |
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| Institution: | (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) |
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| Abstract: | The atomic structure and bond relaxation of NanoparticleCeO2 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 nanoparticleCeO2 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 ofCeO2 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. |
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| Keywords: | CeO2" target="_blank">2')">CeO2 Raman spectrum pressure blue-shift |
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