ABSTRACT

In the present study, the optical transmissions of lyotropic nematic calamitic mesophase (N_C) were measured depending on temperature for wavelengths of 440, 470, 510 and 694.3 nm in visible spectrum using polarised microscopy. For each wavelength, the birefringence was determined in the N_C mesophase temperature region and it was observed that the smaller the wavelength in the visible region, the greater the birefringence. Using the birefringence, macroscopic order parameter was obtained depending on temperature and it was found to be approximately the same for each wavelength. Besides, the textural colour properties of the planar-oriented sample were observed under the microscope throughout the mesophase region. These colour attributes were compared with the Michel-Lévy interference chart and the birefringence was sensitively determined from the chart. This time, the order parameter was studied using the birefringence found from the chart. It was approximately the same as the order parameter found using the microscopy.

摘要

在本研究中，溶致向列型中间相的棒状（N的光学传输_Ç取决于温度，使用偏振显微镜在可见光谱的440，470，510和694.3纳米的波长进行测定）。对于每个波长，在 N _{C 中}确定双折射中间相温度区，观察到可见光区的波长越小，双折射越大。使用双折射，根据温度获得宏观有序参数，并且发现它对于每个波长大致相同。此外，在整个中间相区域的显微镜下观察了平面取向样品的纹理颜色特性。将这些颜色属性与 Michel-Lévy 干涉图进行比较，并根据该图灵敏地确定双折射。这一次，使用从图表中发现的双折射来研究阶次参数。它与使用显微镜发现的顺序参数大致相同。