The Temperature Dependence of Optical Texture in Chiral Nematic Liquid Crystal Observed by Polarizing Microscope

Risti Suryantari; Flaviana Catherine

doi:doi:10.11648/j.jmpt.20200602.12

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The Temperature Dependence of Optical Texture in Chiral Nematic Liquid Crystal Observed by Polarizing Microscope

Risti Suryantari, Flaviana Catherine

Published in Journal of Photonic Materials and Technology (Volume 6, Issue 2)

Received: 7 November 2020 Accepted: 24 November 2020 Published: 4 December 2020

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Abstract

Study the optical-thermal dependence of liquid crystal based on the quantity data of image texture is important to get more information accurately. In this research, the optical-thermal dependence of chiral nematic liquid crystals ink sample was investigated based on the texture and color changes of the sample at various temperatures. The textures of the samples were recorded by the crossed-polarizing optical microscope attached to the hot stage and a camera. The temperature dependence of textures are represented by the hue parameter values taken from the HSV image type. The result obtained from the graph of the increase mean hue parameter against the temperatures was in accordance with the preceding results done by the various techniques. The results show that the higher the temperature of the material, the higher the average hue value. The increase in the hue parameter relates to the color changes of texture from red-dominant to green-dominant. The color difference appeared in various wavelengths represent a diffraction pattern caused by its optically active and the twisted molecular structure. Approaching to the Bragg diffraction equation, the pitch obtained at 0.7 µm. Furthermore, the relation of the different textures and the twist structure of the sample was evaluated. Considering the sample thickness of 100 µm carries out to the conclusion that there are hundreds of twisted nematic liquid crystal molecules in various alignment on a volume space.

Published in	Journal of Photonic Materials and Technology (Volume 6, Issue 2)
DOI	10.11648/j.jmpt.20200602.12
Page(s)	21-27
Creative Commons	This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.
Copyright	Copyright © The Author(s), 2024. Published by Science Publishing Group

Keywords

Optical Texture, Temperature, Polarizing Microscope, Chiral Nematic Liquid Crystal, Hue, Diffraction

References

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[8]	Nastishin, Yu A., et al. (2005). Optical characterization of the nematic lyotropic chromonic liquid crystals: Light absorption, birefringence, and scalar order parameter. Physical Review, E 72.4: 041711.
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[10]	Sigaki Higor, Y. D., Lenzi, E. K., Zola, R. S., Matjaž, P., & Ribeiro, H. V. (2020). Learning physical properties of liquid crystals with deep convolutional neural networks. Scientific Reports (Nature Publisher Group), 10 (1).
[11]	B. T. P. Madhav, P. Pardhasaradhi, R. K. N. R. Manepalli & V. G. K. M. Pisipati. (2015). Histogram equalization technique to analyse induced cholesteric phase in nanodoped liquid crystalline compound. Liquid Crystals, 42: 7, 989-997.
[12]	K. Bjorknas, M. A. Geday & E. P. Raynes. (2003). Quantitative conoscopic imaging of cholesteric thin films. Liquid Crystals, 30: 8, 889-897.
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[14]	S. Sreehari Sastry, S. T. Ha, B. Gowri Sankara Rao, K. Mallika & T. Vindhya Kumari. (2012). Optical properties of a mesogen by image analysis, Liquid Crystals, 39: 11, 1414-1419.
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[19]	Ingo Dierking, Textures of Liquid Crystals, Wiley-VCH Verlag GmbH & Co. KGaA, 2003.
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Risti Suryantari, Flaviana Catherine. (2020). The Temperature Dependence of Optical Texture in Chiral Nematic Liquid Crystal Observed by Polarizing Microscope. Journal of Photonic Materials and Technology, 6(2), 21-27. https://doi.org/10.11648/j.jmpt.20200602.12

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ACS Style

Risti Suryantari; Flaviana Catherine. The Temperature Dependence of Optical Texture in Chiral Nematic Liquid Crystal Observed by Polarizing Microscope. J. Photonic Mater. Technol. 2020, 6(2), 21-27. doi: 10.11648/j.jmpt.20200602.12

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AMA Style

Risti Suryantari, Flaviana Catherine. The Temperature Dependence of Optical Texture in Chiral Nematic Liquid Crystal Observed by Polarizing Microscope. J Photonic Mater Technol. 2020;6(2):21-27. doi: 10.11648/j.jmpt.20200602.12

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@article{10.11648/j.jmpt.20200602.12,
  author = {Risti Suryantari and Flaviana Catherine},
  title = {The Temperature Dependence of Optical Texture in Chiral Nematic Liquid Crystal Observed by Polarizing Microscope},
  journal = {Journal of Photonic Materials and Technology},
  volume = {6},
  number = {2},
  pages = {21-27},
  doi = {10.11648/j.jmpt.20200602.12},
  url = {https://doi.org/10.11648/j.jmpt.20200602.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.jmpt.20200602.12},
  abstract = {Study the optical-thermal dependence of liquid crystal based on the quantity data of image texture is important to get more information accurately. In this research, the optical-thermal dependence of chiral nematic liquid crystals ink sample was investigated based on the texture and color changes of the sample at various temperatures. The textures of the samples were recorded by the crossed-polarizing optical microscope attached to the hot stage and a camera. The temperature dependence of textures are represented by the hue parameter values taken from the HSV image type. The result obtained from the graph of the increase mean hue parameter against the temperatures was in accordance with the preceding results done by the various techniques. The results show that the higher the temperature of the material, the higher the average hue value. The increase in the hue parameter relates to the color changes of texture from red-dominant to green-dominant. The color difference appeared in various wavelengths represent a diffraction pattern caused by its optically active and the twisted molecular structure. Approaching to the Bragg diffraction equation, the pitch obtained at 0.7 µm. Furthermore, the relation of the different textures and the twist structure of the sample was evaluated. Considering the sample thickness of 100 µm carries out to the conclusion that there are hundreds of twisted nematic liquid crystal molecules in various alignment on a volume space.},
 year = {2020}
}

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TY - JOUR
T1 - The Temperature Dependence of Optical Texture in Chiral Nematic Liquid Crystal Observed by Polarizing Microscope
AU - Risti Suryantari
AU - Flaviana Catherine
Y1 - 2020/12/04
PY - 2020
N1 - https://doi.org/10.11648/j.jmpt.20200602.12
DO - 10.11648/j.jmpt.20200602.12
T2 - Journal of Photonic Materials and Technology
JF - Journal of Photonic Materials and Technology
JO - Journal of Photonic Materials and Technology
SP - 21
EP - 27
PB - Science Publishing Group
SN - 2469-8431
UR - https://doi.org/10.11648/j.jmpt.20200602.12
AB - Study the optical-thermal dependence of liquid crystal based on the quantity data of image texture is important to get more information accurately. In this research, the optical-thermal dependence of chiral nematic liquid crystals ink sample was investigated based on the texture and color changes of the sample at various temperatures. The textures of the samples were recorded by the crossed-polarizing optical microscope attached to the hot stage and a camera. The temperature dependence of textures are represented by the hue parameter values taken from the HSV image type. The result obtained from the graph of the increase mean hue parameter against the temperatures was in accordance with the preceding results done by the various techniques. The results show that the higher the temperature of the material, the higher the average hue value. The increase in the hue parameter relates to the color changes of texture from red-dominant to green-dominant. The color difference appeared in various wavelengths represent a diffraction pattern caused by its optically active and the twisted molecular structure. Approaching to the Bragg diffraction equation, the pitch obtained at 0.7 µm. Furthermore, the relation of the different textures and the twist structure of the sample was evaluated. Considering the sample thickness of 100 µm carries out to the conclusion that there are hundreds of twisted nematic liquid crystal molecules in various alignment on a volume space.
VL - 6
IS - 2
ER -

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Author Information

Risti Suryantari

Department of Physics, Parahyangan Catholic University, Bandung, Indonesia
Flaviana Catherine

Department of Physics, Parahyangan Catholic University, Bandung, Indonesia

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Plain Text BibTeX RIS

APA Style

Risti Suryantari, Flaviana Catherine. (2020). The Temperature Dependence of Optical Texture in Chiral Nematic Liquid Crystal Observed by Polarizing Microscope. Journal of Photonic Materials and Technology, 6(2), 21-27. https://doi.org/10.11648/j.jmpt.20200602.12

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ACS Style

Risti Suryantari; Flaviana Catherine. The Temperature Dependence of Optical Texture in Chiral Nematic Liquid Crystal Observed by Polarizing Microscope. J. Photonic Mater. Technol. 2020, 6(2), 21-27. doi: 10.11648/j.jmpt.20200602.12

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AMA Style

Risti Suryantari, Flaviana Catherine. The Temperature Dependence of Optical Texture in Chiral Nematic Liquid Crystal Observed by Polarizing Microscope. J Photonic Mater Technol. 2020;6(2):21-27. doi: 10.11648/j.jmpt.20200602.12

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@article{10.11648/j.jmpt.20200602.12,
  author = {Risti Suryantari and Flaviana Catherine},
  title = {The Temperature Dependence of Optical Texture in Chiral Nematic Liquid Crystal Observed by Polarizing Microscope},
  journal = {Journal of Photonic Materials and Technology},
  volume = {6},
  number = {2},
  pages = {21-27},
  doi = {10.11648/j.jmpt.20200602.12},
  url = {https://doi.org/10.11648/j.jmpt.20200602.12},
  eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.jmpt.20200602.12},
  abstract = {Study the optical-thermal dependence of liquid crystal based on the quantity data of image texture is important to get more information accurately. In this research, the optical-thermal dependence of chiral nematic liquid crystals ink sample was investigated based on the texture and color changes of the sample at various temperatures. The textures of the samples were recorded by the crossed-polarizing optical microscope attached to the hot stage and a camera. The temperature dependence of textures are represented by the hue parameter values taken from the HSV image type. The result obtained from the graph of the increase mean hue parameter against the temperatures was in accordance with the preceding results done by the various techniques. The results show that the higher the temperature of the material, the higher the average hue value. The increase in the hue parameter relates to the color changes of texture from red-dominant to green-dominant. The color difference appeared in various wavelengths represent a diffraction pattern caused by its optically active and the twisted molecular structure. Approaching to the Bragg diffraction equation, the pitch obtained at 0.7 µm. Furthermore, the relation of the different textures and the twist structure of the sample was evaluated. Considering the sample thickness of 100 µm carries out to the conclusion that there are hundreds of twisted nematic liquid crystal molecules in various alignment on a volume space.},
 year = {2020}
}

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