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Related Experiment Video

Updated: Aug 19, 2025

Author Spotlight: Microfluidic Channel-Based Soft Electrodes and Their Application in Capacitive Pressure Sensing

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Published on: March 17, 2023

Versatile Mechanochromic Sensor based on Highly Stretchable Chiral Liquid Crystalline Elastomer.

Woong Chan Han¹, Young-Joo Lee², Se-Um Kim³

¹Department of Polymer Engineering, Pukyong National University, 45 Yongso-ro, Nam-gu, Busan, 608737, Republic of Korea.

Small (Weinheim an Der Bergstrasse, Germany)

|December 4, 2022

Summary

Researchers developed a novel mechanochromic strain sensor using a liquid crystalline elastomer. This sensor can detect orientation, location, and degree of deformation, enabling applications in wearable devices and soft robotics.

Keywords:

chiral liquid crystalline elastomers mechanochromic applications mechanochromic sensors multimodal strain sensors photonic elastomers

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Last Updated: Aug 19, 2025

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Published on: March 17, 2023

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Microfluidic Preparation of Liquid Crystalline Elastomer Actuators

Microfluidic Preparation of Liquid Crystalline Elastomer Actuators

Published on: May 20, 2018

Area of Science:

Materials Science
Polymer Chemistry
Soft Robotics

Background:

Mechanochromic sensors offer visual feedback for strain detection.
Liquid crystalline elastomers (LCEs) possess unique stimuli-responsive properties.
Developing sensors that can distinguish complex deformations remains a challenge.

Purpose of the Study:

To propose a novel mechanochromic strain sensor capable of discerning deformation orientation, location, and degree.
To utilize a main-chain chiral liquid crystalline elastomer (MCLCE) for advanced sensing capabilities.
To demonstrate the sensor's applicability in various configurations and potential for pattern display.

Main Methods:

Fabrication of a highly stretchable MCLCE film via step-growth polymerization of liquid crystal oligomers.
Phase-stabilization of the MCLCE in a solvent mesogen for uniform color shift.
Integration of the MCLCE film onto a stretchable elastomer substrate.

Main Results:

The MCLCE film exhibited uniform and significant color shift even under small strains.
The sensor demonstrated multimodal, instantaneous color changes for in-plane deformation, out-of-plane bending, and nonzero Gaussian deformation.
The sensor successfully displayed color patterns and encrypted images in response to localized stimuli.

Conclusions:

The proposed MCLCE-based sensor effectively distinguishes complex deformation parameters.
The sensor's design allows for versatile applications in wearable devices, displays, and soft robotics.
This work presents a simple yet powerful platform for advanced visual strain sensing.