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Interdependency among electro-optic characteristics and absorption coefficient of homeotropically aligned liquid crystal considering Beer’s law theory

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Abstract

In the present study, interdependency among electro-optic (E-O) characteristics and absorption coefficient of homeotropically aligned liquid crystal (HALC) considering Beer’s law theory has been studied. Specifically, HALC cells were prepared using uniform dispersion of ZnO nanoparticles into the nematic liquid crystal without applying any surface treatment to the substrates. Then azo dichroic dye (orange) was added in a fixed concentration to the prepared nanoparticles dispersed LC mixture. The morphological and absorption characteristics of prepared HALC cells were found to be improved with the addition of azo dichroic dye. The optical textures observed at macroscopic and microscopic levels are in correspondence with each other and showed excellent OFF/ON switching with magnificently dark and bright views. Moreover, HALC cells doped with azo dichroic dye exhibited a higher value of absorption coefficient with an improved contrast ratio. Thus, a good consistency was observed among experimentally observed E-O characteristics and theoretically measured absorption coefficient.

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Acknowledgement

Pankaj Kumar gratefully acknowledges the financial support by SERB, Department of Science and Technology (New Delhi), Government of India, under the research project number EMR/2017/005282.

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Authors and Affiliations

  1. Centre for Liquid Crystal Research, Chitkara University Institute of Engineering and Technology, Chitkara University, Rajpura, 140401, India

    Chinky, Pankaj Kumar & Ankit Rai Dogra

  2. Liquid Crystal Laboratory, Department of Physics, Dr. B. R. Ambedkar National Institute of Technology, Jalandhar, 144011, India

    Praveen Malik

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  1. Chinky
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  2. Pankaj Kumar
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  3. Ankit Rai Dogra
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  4. Praveen Malik
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Correspondence to Pankaj Kumar.

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Chinky, Kumar, P., Dogra, A.R. et al. Interdependency among electro-optic characteristics and absorption coefficient of homeotropically aligned liquid crystal considering Beer’s law theory. Bull Mater Sci 45, 85 (2022). https://doi.org/10.1007/s12034-022-02667-8

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  • DOI: https://doi.org/10.1007/s12034-022-02667-8

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