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Related Experiment Video

Updated: Jan 20, 2026

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
06:24

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal

Published on: October 31, 2019

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Graphene-Augmented Polymer Stabilization: Drastically Reduced and Temperature-Independent Threshold and Improved

Marlin Baral1, Kommula Bramhaiah1, Neena Susan John1

  • 1Centre for Nano and Soft Matter Sciences, Jalahalli, Bengaluru 560013, India.

ACS Omega
|August 29, 2019
PubMed
Summary

Graphene-enhanced polymer-stabilized liquid crystal (PSLC) devices offer improved performance. Dilute graphene concentrations significantly lower operating voltage and enhance contrast for smart window applications.

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Last Updated: Jan 20, 2026

High-Contrast and Fast Photorheological Switching of a Twist-Bend Nematic Liquid Crystal
06:24

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Area of Science:

  • Materials Science
  • Nanotechnology
  • Polymer Science

Background:

  • Graphene and liquid crystals (LCs) are explored for novel material development.
  • Polymer networks enhance LC mechanical strength and optical properties.
  • Combining these materials can lead to advanced device characteristics.

Purpose of the Study:

  • To develop graphene-incorporated polymer-stabilized liquid crystal (PSLC) devices.
  • To investigate the impact of graphene on PSLC morphology and performance.
  • To explore the potential of these composites in device engineering.

Main Methods:

  • Synthesis of graphene-incorporated polymer networks.
  • Encapsulation of liquid crystals within these networks.
  • Characterization of polymer morphology using electron microscopy.
  • Evaluation of PSLC electro-optical properties, including critical voltage and contrast ratio.

Main Results:

  • Graphene incorporation induced distinct morphological changes in the polymer network.
  • PSLC devices exhibited a 7-fold reduction in critical voltage.
  • The devices demonstrated temperature invariance and an enhanced contrast ratio.
  • Optimal properties were achieved at very dilute concentrations of graphene nanoparticles.

Conclusions:

  • Graphene-polymer composites offer significant advantages for PSLC devices.
  • Dilute graphene concentrations are crucial for augmenting desired properties.
  • This approach opens new possibilities for device engineering, such as substrate-free smart windows.