Fluorescent hydrogel actuators with simultaneous morphing- and color/brightness-changes enabled by light-activated 3D printing

Zuo, Xiaoling; Wang, Shaofan; Zhou, Ying; Wu, Chong; Huang, Anrong; Wang, Tengfei; Yang, Yinye

doi:10.1016/j.cej.2022.137492

Cited by 31 publications

(26 citation statements)

References 44 publications

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“…Different proportions of lanthanide ions were doped into the hydrogel so that the hydrogel emitted different fluorescence colors under 254 nm UV light irradiation. [74] The hydrogels can self-actuate in response to temperature. Meanwhile, the hydrogels show fluorescent color changes with temperature due to the intrinsic energy transfer from Tb-to Eu-luminescent chromophore upon heating.…”

Section: Fluorescent Actuators Based On Hydrogelsmentioning

confidence: 99%

“…constructed fluorescent hydrogel actuators with gradient crosslinked structures using light‐activated 3D printing technology. Different proportions of lanthanide ions were doped into the hydrogel so that the hydrogel emitted different fluorescence colors under 254 nm UV light irradiation [74] . The hydrogels can self‐actuate in response to temperature.…”

Section: Stimuli‐responsive Fluorescent Actuatorsmentioning

confidence: 99%

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Stimuli‐responsive photonic actuators for integrated biomimetic and intelligent systems

Gao

Tang

Martella

et al. 2023

Responsive Materials

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Photonic actuators, serving as an emerging kind of intelligent stimuli‐responsive material, can exhibit the abilities to change their structural colors/fluorescence and shapes under specific external stimuli, which have demonstrated essential applications in the fields of intelligent soft robotics, sensors, bionics, information storage, anti‐counterfeiting, and energy harvesting. In this review, we reported the state‐of‐the‐art research progress of stimuli‐responsive photonic actuators classified on the basis of the material type and focusing on the actuation mechanisms, design principles, and processing techniques. We also broadly summarized the relative applications of photonic actuators in bionics, intelligent robots, sensors, and so on. Finally, a vision for the challenges in the area and future promising directions of stimuli‐responsive photonic actuators is presented.

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Section: Fluorescent Actuators Based On Hydrogelsmentioning

confidence: 99%

Section: Stimuli‐responsive Fluorescent Actuatorsmentioning

confidence: 99%

Stimuli‐responsive photonic actuators for integrated biomimetic and intelligent systems

Gao

Tang

Martella

et al. 2023

Responsive Materials

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“…Stimuli-responsive color changes are gifts to the diversity of natural lives. , A large variety of animals, including octopuses, chameleons, and butterflies, can take advantage of color changes for the purpose of threat, courtship, or self-protection. Inspired by these interesting phenomena, human beings have learned from our neighbors and integrated color changing properties into functional materials like hydrogels, − polymeric films, − and elastomers. − However, despite massive studies associated with stimulus-responsive materials on display technology, − aerospace industry, − and information security, − synthesis of thermally stable materials awaits further exploration. Most of the existing stimulus-responsive hydrogels and elastomers are not thermally stable enough to be directly applied as high-resolution sensors working at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

Heat-Resistant and Color-Changing Luminescent Polysulfone for Information Encryption and Fire Alarming

Li²,

Wei

et al. 2023

ACS Appl. Mater. Interfaces

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An intrinsic difficulty with thermally responsive photoluminescent materials is that high temperatures usually destroy luminance due to the notorious thermal quenching effect. Limited by the vulnerable chemical structure and soft skeleton, most of the existing photoluminescent responsive materials fail to indicate or work at a surging temperature over 100 °C, thus limiting application in display and alarming in harsh conditions. Herein, enlightened by chameleon's adaptive nature to external stimulus, we introduce a topologically optimized electron donor−acceptor (DA) structure and supramolecular interactions of lanthanide ions into the polymer backbone. The emission color determined by the DA structure is stable at high temperatures, and metal−ligand interaction phosphorescence is temperature-adjustable. Owing to the excellent reproducibility and heat resistance of composite films, the sensors can be bent into different three-dimensional structures and adhered to metal surfaces as flexible thermometers with superior display resolution. The polymer composite film could be directly applied as a photoluminescent quick response (QR) code, with patterns simultaneously variable to a temperature from 30 to 150 °C free of manual operation. More importantly, the polymeric composite could be in-situ-oxidized to a "sulfone" structure with an enhanced glass transition temperature of 297−304 °C. The heat-and flame-resistant characteristics of the oxidized films give rise to the application of fire alarming devices since it can locate the fire source and respond exactly depending on the distance from the fire. The unique display, encryption, and alarming functions of the polymeric composite studied in this work bring forward a new concept of developing a great information security and disaster monitoring system with the application of temperature-responsive materials.

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“…Recently, highly strong, self-healable, and stimuli-responsive luminescent hydrogels (LHs) have believed to be next-generation smart optical materials with excellent photoluminescent (PL) properties, flexibility, process ability, and outstanding mechanical properties. − These LHs can undergo or actuate obvious changes in their structures and luminescence properties in response to environmental stimuli (pH, light, metal ions, temperature, and so on), increasing their functionality and utility of smart systems. − In particular, LHs are particularly attractive due to their three-dimensional hydrophilic network immobilizing high water content, excellent biocompatibility, and gel-like characteristic, showing a broad range of applications in display, soft actuators, sensors, information encryption, and biomimetic robotics. − Regrettably, structural optimizations and challenges in implementation still restrict their further developments. (1) Conventional hydrogel actuators were usually either too soft or too fragile, thus limiting their practical applications under mechanical strain .…”

Section: Introductionmentioning

confidence: 99%

Tough, Self-Healing, and UV Light-Switchable Luminescent Hydrogels with Reversible Stimuli-Responsive Properties for Cu²⁺

Liang

Zhao

Wang

et al. 2023

ACS Appl. Polym. Mater.

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Stimuli-responsive luminescent hydrogels (LHs) are of great potential for applications in advanced luminescent sensors; however, structural optimizations and challenges in implementation still remain in their practical applications. Herein, we reported a promising and cooperative strategy to prepare smart LH actuators. Lanthanide(III)-based complexes (LnCs) and sulfur quantum dots (S-QDs) in this contribution are constructed in a cooperative manner; that is, (1) a noncovalent hydrogen bonding model between polyethylene glycol (PEG) in S-QDs and polyurethane (PU) endows LHs with interwoven double networks and improved the mechanical properties and (2) LnCs and S-QDs are two excellent emitting centers with different luminescent excitation properties, leading to the modulating emission colors of LHs by varying the UV irradiation between 254 and 365 nm. Meanwhile, the resultant LHs containing 3.26 wt % of PU possess good mechanical performance and self-healing capability. As a proof of application in stimuli response, our LHs can be served as a ratiometric luminescence probe to electively detect Cu 2+ via exponentially correlating the emission intensity ratio of LnCs and S-QDs to the Cu 2+ concentration. Remarkably, the obtained LHs also show reversible luminescence "On/Off" switch upon alternate exposure to Cu 2+ /glutathione (GSH) under 254 nm, while no obvious luminescent variation is observed under 365 nm.

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Fluorescent hydrogel actuators with simultaneous morphing- and color/brightness-changes enabled by light-activated 3D printing

Cited by 31 publications

References 44 publications

Stimuli‐responsive photonic actuators for integrated biomimetic and intelligent systems

Stimuli‐responsive photonic actuators for integrated biomimetic and intelligent systems

Heat-Resistant and Color-Changing Luminescent Polysulfone for Information Encryption and Fire Alarming

Tough, Self-Healing, and UV Light-Switchable Luminescent Hydrogels with Reversible Stimuli-Responsive Properties for Cu²⁺

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Fluorescent hydrogel actuators with simultaneous morphing- and color/brightness-changes enabled by light-activated 3D printing

Cited by 31 publications

References 44 publications

Stimuli‐responsive photonic actuators for integrated biomimetic and intelligent systems

Stimuli‐responsive photonic actuators for integrated biomimetic and intelligent systems

Heat-Resistant and Color-Changing Luminescent Polysulfone for Information Encryption and Fire Alarming

Tough, Self-Healing, and UV Light-Switchable Luminescent Hydrogels with Reversible Stimuli-Responsive Properties for Cu2+

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Product

Resources

About

Tough, Self-Healing, and UV Light-Switchable Luminescent Hydrogels with Reversible Stimuli-Responsive Properties for Cu²⁺