| 稀土离子掺杂纳米TiO_2的太赫兹光谱研究 |
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| 作者姓名： | Feng XJ Huang WX Shi QW Zhang YB Luo Y Zhang YX |
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| 作者单位： | 1. 四川大学材料科学与工程学院,四川成都,610064
2. 电子科技大学物理电子学院太赫兹研究中心,四川成都,610054 |
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| 基金项目： | 国家自然科学基金项目(61072036); 国家“973”重大基础研究项目(2007CB310401)资助 |
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| 摘 要： | 对sol-gel法制备的不同稀土元素(Ce,Nd,Sm)掺杂的纳米TiO2粒子进行研究。X射线衍射(XRD)和X射线光电子能谱(XPS)分析结果表明,稀土离子均以间隙的形式均匀分布在纳米TiO2晶格内。傅里叶变换红外光谱(FTIR)和太赫兹时域光谱(THz-TDS)显示,掺杂TiO2较纯TiO2具有更强的红外活性;在0.2~1.70 THz波段,TiO2的折射率随着频率的增加而减小,并呈现反常色散现象;Ce掺杂引起新的特征吸收,分别为1.35和1.58 THz,且造成太赫兹吸收谱的吸收边发生红移,Nd和Sm掺杂则造成吸收边蓝移。在0.2~1.7 THz范围内,Sm掺杂引起的介电损耗角正切值(taneδ)最小,其平均值为0.05。
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| 关 键 词： | 太赫兹时域光谱技术 稀土掺杂纳米TiO2 吸收系数 介电损耗 |
Terahertz spectroscopic investigation of lanthanide-doped nano-TiO2 |
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| Feng XJ,Huang WX,Shi QW,Zhang YB,Luo Y,Zhang YX.Terahertz spectroscopic investigation of lanthanide-doped nano-TiO2[J].Spectroscopy and Spectral Analysis,2011,31(10):2624-2628. |
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| Authors: | Feng Xiu-Jun Huang Wan-Xia Shi Qi-Wu Zhang Yu-Bo Luo Yi Zhang Ya-Xin |
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| Institution: | FENG Xiu-jun1,HUANG Wan-xia1*,SHI Qi-wu1,ZHANG Yu-bo1,LUO Yi1,ZHANG Ya-xin21.College of Materials Science and Engineering,Sichuan University,Chengdu 610064,China2.Terahertz Research Center,School of Physical Electronics,University of Electronic Science and Technology of China,Chengdu 610054,China |
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| Abstract: | Lanthanide-doped nano-TiO2 samples with different Ti/Ln(Ln=Ce,Nd,and Sm) were synthesized by sol-gel method.The samples were characterized by X-ray diffraction(XRD),Fourier transform infrared spectroscopy(FTIR),X-ray photoelectron spectroscopy(XPS) and terahertz time-domain spectroscopy(THz-TDS).The results indicate that Ce,Nd,and Sm ions were uniformly dispersed into the TiO2;and the infrared activities of lanthanide-deped nano-TiO2 were much stronger than Undoped nano-TiO2,the refractive index of anatase ... |
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| Keywords: | Terahertz time-domain spectroscopy Lanthanide-doped nano-TiO2 Absorbance Dielectric losses |
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