碳纳米管应变传感测量与偏振拉曼控制方法研究  

Study on the CNT Sensor for Strain Measurement and Its Control Method of Raman Polarization

作　　者：李石磊[1] 仇巍[1] 亢一澜[1] 雷振坤[2] 李秋[1] 邓卫林[1] 高頔[1] 

机构地区：[1]天津大学机械工程学院力学系,现代工程力学天津市重点实验室,天津300072 [2]大连理工大学工程力学系,工业装备结构分析国家重点实验室,辽宁大连116024

出　　处：《光谱学与光谱分析》2013年第5期1244-1248,共5页Spectroscopy and Spectral Analysis

基　　金：国家重大科学研究计划项目(2012CB937500);国家自然科学基金项目(11002097和10972047)资助

摘　　要：面向微尺度平面变形的精细测量对碳纳米管应变传感测量方法进行了理论与实验研究。利用碳纳米管的拉曼应变敏感性及其偏振选择性,针对各种典型的拉曼光谱系统偏振构型,推导建立了适于各种偏振拉曼构型的碳纳米管平面应变传感解析关系式。从测量学角度出发,对不同偏振构型下的应变传感进行了对比分析,得出入射与散射光偏振方向皆能够连续控制且始终保持平行的双偏协同构型最适合于平面应变传感,并进一步提出易于实现的双偏协同构型光路配置方式与控制方法。通过实验应用证明,所提出的方法能够有效的实现基于偏振拉曼的碳纳米管平面应变传感测量。The present paper studied the methodology of carbon nanotube （CNT） sensor applicable for the strain measurement in microscale. Based on the varieties of polarization configurations of the Raman spectrometers, a series of analytic expressions of CNT sensor were derived by applying the Raman properties of the CNT, such as the strain sensitivity and the polarization selec- tivity. From the viewpoint of metrology, the sensoring relationships corresponding to different polarization configurations were compared and contrasted with one another, which educed that the ＂bipolar homology＂ type is most suitable for the strain meas- urement where both the incident and scattered lights are continuously controllable and always remain parallel to each other. A new easy-realized control method for this configuration is introduced. The experiments proved that the method presented in this paper can effectively measure the in-plane strain components in microscale by polarized micro-Raman spectroscopy.

关 键 词：偏振微拉曼光谱 碳纳米管传感器 平面应变测量 偏振构型与控制 

分 类 号：O657.3[理学—分析化学]