Voltage-tunable elastomer composites that use shape instabilities for rapid structural color changes

Xiao, Ming; Mao, Jie; Kollosche, Matthias; Hwang, Victoria; Clarke, David; Manoharan, Vinothan N.

doi:10.1039/d2mh00374k

Cited by 10 publications

(6 citation statements)

References 40 publications

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“…[60] To meet the requirements of dynamic display for color-change speed, many scientists have focused on dielectric elastomers that can rapidly expand and contract under voltage. [61][62][63][64] By compounding a PhC structure on a dielectric elastomer or directly preparing a PhC from a dielectric elastomer, the expansion and contraction of the dielectric elastomer under voltage action lead to the changes in the lattice spacing of the PhC. These PhC displays based on dielectric elastomers can achieve fast color switching within 1 s (Figure 3C).…”

Section: Electric Driving Phc Displaymentioning

confidence: 99%

Bioinspired reflective display based on photonic crystals

Liu,

Hou,

Song

et al. 2024

Interdisciplinary Materials

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Reflective displays have the advantages of energy efficiency, high brightness, eye protection, and good readability, making them an attractive display technology. Photonic crystal (PhC) structural color is highly regarded as an ideal choice for reflective displays for its ecofriendliness, colorfastness, and adjustability. In this review, we introduce the fundamental classification and manufacturing methods of PhC reflective displays. We systematically summarize the display principles of PhC‐based displays driven by various stimuli. Furthermore, we present the latest research advancements in PhC displays based on smart actuators. Additionally, we offer a detailed overview of the current research status and application prospects of liquid crystal structural color displays and three‐dimensional PhC displays. Finally, we discuss the challenges faced by PhC displays and provide insights into their prospects.

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Section: Electric Driving Phc Displaymentioning

confidence: 99%

Bioinspired reflective display based on photonic crystals

Liu,

Hou,

Song

et al. 2024

Interdisciplinary Materials

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“…In the case of DEA composites, the combination of DEA with stretchable photonic crystals allowed Zhao et al, to develop a color-changing DEA device responsive to deformation [81]. Furthermore, the use of monodispersed glassy silica nanoparticles in the elastomer allowed a display to be created with controllable transparency based on the degree of deformation [82]. Other studies involving the use of creating camouflaging and color-changing structures with DEAs include references [33,83,84].…”

Section: Transformation (Structure/property Changes)mentioning

confidence: 99%

Dielectric Elastomer-Based Actuators: A Modeling and Control Review for Non-Experts

Medina,

Farmer,

Liu

2024

Actuators

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Soft robotics are attractive to researchers and developers due to their potential for biomimicry applications across a myriad of fields, including biomedicine (e.g., surgery), the film industry (e.g., animatronics), ecology (e.g., physical ‘animats’), human–robot interactions (e.g., social robots), and others. In contrast to their rigid counterparts, soft robotics offer obvious actuation benefits, including their many degrees of freedom in motion and their potential to mimic living organisms. Many material systems have been proposed and used for soft robotic applications, involving soft actuators, sensors, and generators. This review focuses on dielectric elastomer (DE)-based actuators, which are more general electro-active polymer (EAP) smart materials. EAP-based soft robots are very attractive for various reasons: (a) energy can be efficiently (and readily) stored in electrical form; (b) both power and information can be transferred rapidly via electrical phenomena; (c) computations using electronic means are readily available. Due to their potential and benefits, DE-based actuators are attractive to researchers and developers from multiple fields. This review aims to (1) provide non-experts with an “easy-to-follow” survey of the most important aspects and challenges to consider when implementing DE-based soft actuators, and (2) emphasize current solutions and challenges related to the materials, controls, and portability of DE-based soft-actuator systems. First, we start with some fundamental functions, applications, and configurations; then, we review the material models and their selection. After, we outline material limitations and challenges along with some thermo-mechano-chemical treatments to overcome some of those limitations. Finally, we outline some of the control schemes, including modern techniques, and suggest using rewritable hardware for faster and more adaptive controls.

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“…The structural color of PCs is also related to the geometry of the substrates. [274,275] PCs constructed on the surface of spherical substrates display angle-independent structural color. [276] PCs fabricated on cylindrical surfaces show angleindependent structural colors in the direction of the circular section and angle-dependent structural colors in the direction of the column.…”

Section: Design Of Angle-independent Structural Color Sensing Of Spcssmentioning

confidence: 99%

“…The structural color of PCs is also related to the geometry of the substrates [274,275] . PCs constructed on the surface of spherical substrates display angle‐independent structural color [276] .…”

Section: Design Of Angle‐independent Structural Color Sensing Of Spcssmentioning

confidence: 99%

Recent progress in low‐swellable polymer‐based smart photonic crystal sensors

Qi,

Zhang

2023

Smart Molecules

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Low‐swelling polymers (LSPs) generally refer to materials with a low solvent absorption ratio or volume expansion rate at swelling equilibrium. LSPs with exceptional responsiveness could be upgraded to smart sensors with structural color self‐reporting by bridging photonic crystals (PCs). Based on the regulation of swelling to effective refractive index, lattice spacing, the order‐disorder arrangement of nanostructures, and incident/detection angle, the structural color feedback of smart photonic crystal sensors (SPCSs) can quantitatively and visually reveal the stimulus, which greatly promotes the interdisciplinary development of nanophotonic technology in the fields of chemical engineering, materials science, engineering mechanics, biomedicine, environmental engineering, etc. Herein, to clarify the role of the photonic structures and polymer molecules in high‐performance SPCSs, LSP‐based SPCSs are summarized and discussed, including general swelling mechanisms, color change strategies, structural design, and typical functional applications. It aims to figure out the combination rule between PC structures and LSPs, optimize the design of PC structures, and expound the corresponding structural color sensing mechanisms, inspiring the fabrication of next‐generation SPCSs. Finally, perspectives on future structural design and sensing applications are also presented. It is believed that SPCSs are multifunctional nanophotonic tools for the interdisciplinary development of numerous engineering fields in the future.

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Voltage-tunable elastomer composites that use shape instabilities for rapid structural color changes

Abstract: Structurally colored materials can switch colors in response to external stimuli, which makes them potentially useful as colorimetric sensors, dynamic displays, and camouflage. However, their applications are limited by the...

Cited by 10 publications

References 40 publications

Bioinspired reflective display based on photonic crystals

Bioinspired reflective display based on photonic crystals

Dielectric Elastomer-Based Actuators: A Modeling and Control Review for Non-Experts

Recent progress in low‐swellable polymer‐based smart photonic crystal sensors

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