| Laser light scattering technique for non-invasive in situ simultaneous measurements on elastic constants and viscosity coefficients of nematic liquid crystals |
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| 引用本文： | TU Mei & HUANG Yaoxiong Institute of Biomedical Engineering,Jinan University,Guangzhou 510632,China Correspondence should be addressed to Huang Yaoxiong (email: tyxhuang@jnu.edu.cn) Received August 8,2003. Laser light scattering technique for non-invasive in situ simultaneous measurements on elastic constants and viscosity coefficients of nematic liquid crystals[J]. 中国科学G辑(英文版), 2004, 47(1) |
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| 作者姓名： | TU Mei & HUANG Yaoxiong Institute of Biomedical Engineering Jinan University Guangzhou 510632 China Correspondence should be addressed to Huang Yaoxiong (email: tyxhuang@jnu.edu.cn) Received August 8 2003 |
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| 基金项目： | 国家自然科学基金，the Key Object Foundation of the Ministry of Education of China |
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| 摘 要： | Theelasticconstantsandtheviscositycoefficientsarethekeyparametersforthephysicalpropertiesofnematicliquidcrystals(LCs)[1,2],fortheyarecorrespondingtothethresholdvoltageandtherespondingtimeofliquidcrystaldisplaydevices[3,4].Sofarnotechniquethatcansimultaneouslymeasurethetwoparametersinsituhasbeenreported.TheelasticconstantsandviscositycoefficientsofnematicLCsatthepresentaremeasuredusingdifferentmethodsindependently.TheviscositycoefficientsisgenerallymeasuredwithOstwaldviscosimeter,andtheelasti…
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Laser light scattering technique for non-invasive in situ simultaneous measurements on elastic constants and viscosity coefficients of nematic liquid crystals |
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| TU Mei,HUANG Yaoxiong. Laser light scattering technique for non-invasive in situ simultaneous measurements on elastic constants and viscosity coefficients of nematic liquid crystals[J]. Science in China(Physics Astronomy), 2004, 47(1) |
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| Authors: | TU Mei HUANG Yaoxiong |
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| Affiliation: | Institute of Biomedical Engineering, Jinan University, Guangzhou 510632, China |
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| Abstract: | The laser light scattering technique for non-invasive in situ simultaneous measurements on elastic constants and viscosity coefficients of nematic liquid crystals is introduced. By measuring the autocorrelation function of the scattered light from nematic liquid crystals at different scattering angles, the splay and twist elastic constants K11 and K22 are obtained from the amplitudes of the autocorrelation function, and the viscosity coefficients of hSplay and hTwist are determined using the viscoelastic ratios K11/h Splay and K22/hTwist from the relaxation parameters of the two modes. |
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| Keywords: | dynamic light scattering nematic liquid crystal elastic constants viscosity coefficients. |
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