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Fabrication strategies and microscale sensing functionalities of mechanochromic colloidal photonic crystals for underwater applications

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Microstructures 2024;4:[Accepted].
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Abstract

Mechanochromic colloidal photonic crystals (PCs), which typically integrate a self-assembled PC array with highly elastic medium, exhibit the ability to reversibly respond to external mechanical stimuli by altering the periodicity of PC structures. Nowadays, leveraging visible indications and optical signals for mechanical forces, mechanochromic colloidal PCs have been widely used in reflecting body motion, health monitoring, and communications in daily life. However, despite their extensive applications on land, it is vital to explore the potential of mechanochromic sensing applications under water, where message transmission mainly relies on body gestures and motions. This review comprehensively examines recent advancements in mechanochromic colloidal PCs and their underwater applications. The first part introduces the response mechanism of mechanochromic colloidal PCs, emphasizing the main principles that facilitate sensing on the micro scale. The second part describes the fabrication strategies for constructing mechanochromic colloidal PCs, demonstrating various approaches to establish optical sensors with specific functionalities. The final section discusses the confronted challenges and summarizes the potential opportunities in developing mechanochromic colloidal PCs for underwater sensing applications.

Keywords

Mechanochromic, colloidal photonic crystal, underwater sensor, flexible elastomer, strain sensor

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Qi FL, Li Q, Ding CF, Wu JB. Fabrication strategies and microscale sensing functionalities of mechanochromic colloidal photonic crystals for underwater applications. Microstructures 2024;4:[Accept]. http://dx.doi.org/10.20517/microstructures.2024.09

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© The Author(s) 2024. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, sharing, adaptation, distribution and reproduction in any medium or format, for any purpose, even commercially, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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