Liquid crystal parameters through image analysis |
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| Authors: | S Sreehari Sastry Sandeep Kumar T Vindhya Kumari K Mallika B Gowri Sankara Rao Ha Sie Tiong |
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| Institution: | 1. Department of Physics , Acharya Nagarjuna University , Nagarjunanagar , India sreeharisastry@yahoo.com;3. Department of Soft Condensed Matter , Raman Research Institute , Bangalore , India;4. Department of Physics , Acharya Nagarjuna University , Nagarjunanagar , India;5. Department of Chemical Science, Faculty of Science , UniversitiTunku Abdul Rahman, Jalan Universiti , Perak , Malaysia |
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| Abstract: | A technique which combines image analysis and polarising optical microscope (POM) is a useful tool for the physical investigation of discotic liquid crystals, such as hexabutoxytriphenylene and hexahexyloxytriphenylene. This investigation includes the phase transitions, optical properties and order parameter as a function of temperature. Textures of discotic liquid crystals are captured as a function of temperature using POM. These microscopic textures are analysed using MATLAB software to compute statistical parameters, Legendre moments, optical parameters and order parameters of discotic liquid crystal samples. Compared with other techniques in the literature, the proposed methodology is a reliable and very simple technique for the physical investigation of liquid crystals. |
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| Keywords: | discotic liquid crystals textures image analysis phase transitions optical properties triphenylene |
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