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锐钛矿二氧化钛超细纳米晶的三声子互作用

Size Effects of Three-phonon Interaction of Extrafine Anatase TiO₂ Nanocrystal

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【Author】 ZHU Ke-rong~(1,2),CHEN Qiang~1,HONG Jian-ming~1,DENG Yu~1,ZHOU Jian-xin~1,YIN Zhen~1,ZHANG Ming-sheng~(1,*)(1.National Laboratory of Solid State Microstructures and Center for Materials Analysis,Nanjing University,Nanjing 210093 China;2.Modern Experiment Technology Center and School of Physics & Material Science,Anhui University,Hefei 230093 China)

【机构】南京大学固体微结构物理实验室和现代分析中心；南京大学固体微结构物理实验室和现代分析中心南京210093；安徽大学现代实验技术中心和物理与材料科学学院；合肥230039；南京210093；

【摘要】本文通过对粒径为2.2-25.5nm的锐钛矿二氧化钛超细纳米晶在83-293 K温度范围内的变温拉曼光谱的研究,得到了三声子互作用对拉曼频率和线宽的贡献随粒径的变化关系。结果表明锐钛矿二氧化钛超细纳米晶的三声子相互作用随粒径减小而加强。更多还原

【Abstract】 Raman spectra of anatase TiO₂ nanocrystals with grain size 2.2-25.5 nm were measured at temperature range 83-293 K.The contributions of three-phonon coupling to the frequency and bandwidth at various grain sizes were obtained from the temperature dependence of the Raman spectra,and the results show that the phonon coupling is increased in extrafine anatase TiO₂ nanocrystals.更多还原