The laser light scattering technique for non-invasivein situ simultaneous measurements on elastic constants and viscosity coefficients of nematic liquid crystals is introduced. By measuring the autocorrelation functio...The laser light scattering technique for non-invasivein 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 constantsK 11 andK 22 are obtained from the amplitudes of the autocorrelation function, and the viscosity coefficients ofη Splay andη Twist are determined using the viscoelastic ratiosK 11/η Splay andK 22 η Twist from the telaxation parameters of the two modes.展开更多
基金partly supported by the National Natural Science Foundation of China(Grant No.30227001)the Key Object Foundation of the Ministry of Education of China.
文摘The laser light scattering technique for non-invasivein 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 constantsK 11 andK 22 are obtained from the amplitudes of the autocorrelation function, and the viscosity coefficients ofη Splay andη Twist are determined using the viscoelastic ratiosK 11/η Splay andK 22 η Twist from the telaxation parameters of the two modes.
