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文章编号:1004-0609(2008)10-1914-06 酸性NaF-AlF3熔盐离子结构的Raman光谱 胡宪伟,王兆文,陈广华,路贵民,崔建忠,曹晓舟 (东北大学 材料电磁过程研究教育部重点实验室,沈阳 110004) 摘 要:采用紫外激光Raman光谱,在封闭样品池中研究不同分子比的酸性NaF-AlF3熔盐的离子结构.结果表明:当电解质分子比为1时,熔盐中的铝氟离子团只以的形式存在,而对于分子比大于1的酸性电解质,熔盐中有和两种铝氟离子团形式；随着温度的增加,离子团的"寿命"越来越短,而且特征波段峰的峰位随分子比的增加而发生红移,温度对的"寿命"影响不大.Raman光谱的定量分析表明,在测量的熔盐配重分数区间内,温度对于熔盐中各离子摩尔分数的影响不大,而且F-含量很小,当NaF的配重摩尔分数为0.60时,的摩尔分数在0.75左右,的摩尔分数仅约为0.25；当......
SWNTs surface with amino groups before introducing Au NPs. From Raman scattering spectroscopy of the Au-functionalized suspended SWNTs, enhanced Raman scattering properties are obtained. The results... images were obtained from direct observation of functionalized samples after the substrates had been cut. The SWNTs were optically characterized by micro-Raman scattering spectroscopy (Jobin Yvon......
Defective graphene as a high-efficiency Raman enhancement substrateTong Zhao1,2,Zhibo Liu1,Xing Xin1,3,Hui-Ming Cheng1,2,4,Wencai Ren1,21. Shenyang National Laboratory for Materials Science... substrate for Raman enhancement,which is called graphene-enhanced Raman scattering.However,the chemically inert and hydrophobic surface of PG hinders the adsorption of molecules especially in aqueous......
J. Cent. South Univ. Technol. (2010) 17: 991-999 DOI: 10.1007/s11771-010-0589-y Node scattering manipulation based on trajectory model in wireless sensor network PEI Zhi-qiang(裴智强), XU Chang... Abstract: To deploy sensor nodes over the area of interest, a scheme, named node scattering manipulation, was proposed. It adopted the following method: during node scattering, the initial states......
纳米TiO2的Raman光谱研究进展 潘晓燕1,马学鸣1 (1.上海大学材料科学与工程学院,) 摘要:Raman光谱是研究纳米TiO2结构的最常用工具之一.纳米T2O2的Raman光谱研究是建立在以前对TiO2体材料的Raman光谱研究的基础之上.但是纳米TiO2与体相材料的表面性质和结构有较大的不同,其Raman光谱会产生明显变化.研究人员对纳米TiO2的Raman光谱已展开研究.本文概述了晶粒大小,结构,氧空位,退火温度,压力,相组成等因素对纳米TiO2的Raman光谱的影响. 关键词:纳米TiO2; Raman光谱; [全文内容正在添加中] ......
SrBi_2Ta_2O_9纳米颗粒的Raman光谱研究 王文1,吕喆1,贾德昌1,寇晓静2,周玉1,柯华1 (1.哈尔滨工业大学,黑龙江,哈尔滨,150001;2.黑龙江科技学院,黑龙江,哈尔滨,150027) 摘要:采用Raman光谱的方法研究了化学计量和非化学计量SrBi_2Ta_2O_9(SBT)纳米颗粒晶格振动行为.通过常温,变温Raman光谱分析,得到了SBT尺寸效应和结构对称性方面的信息.软模振子频率的平方随温度的变化不符合单一的ω_s~2=A(T_c-T)关系揭示了尺寸效应可以导致新的相变.非化学计量SBT的Raman振动峰强度改变和峰形变化的主要因素为总电荷数以及Sr与Bi原子之间的相互取代关系.单个分子式总电荷数低于化学计量SBT总电荷数的样品,总电荷数的因素起主要作用;总电荷数高于化学计量SBT的样品,Bi原子部分取代Sr原子位置为主要因素. 关键词......
J. Cent. South Univ. (2012) 19: 1317-1321 DOI: 10.1007/s11771-012-1144-9 Scattering loss in optical waveguide with trapezoidal cross section PENG Wen-qiang(彭文强), WU Yu-lie(吴宇列), LIU Yong(刘勇... Heidelberg 2012 Abstract: To get the scattering loss of the trapezoidal core waveguide, a new analysis model is presented based on the perturbation equivalent method and modified effective-index method......
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J. Cent. South Univ. (2016) 23: 604-622 DOI: 10.1007/s11771-016-3107-z Time-domain compressive dictionary of attributed scattering center model for sparse representation ZHONG Jin-rong(钟金荣), WEN...-Verlag Berlin Heidelberg 2016 Abstract: Parameter estimation of the attributed scattering center (ASC) model is significant for automatic target recognition (ATR). Sparse representation based parameter......
Physically-based modeling for hole scattering rate in strained Si1-xGex/(100)SiWANG Bin(王斌)1, 2, HU Hui-yong(胡辉勇)2, ZHANG He-ming(张鹤鸣)2, SONG Jian-jun(宋建军)2, ZHANG Yu-ming(张玉明)2(1. School..., China)Abstract:based on the Fermi’s golden rule and the theory of Boltzmann collision term approximation, a physically-based model for hole scattering rate (SR) in strained Si1-xGex/(100)Si was presented......
