Interactively Full‐Color Changeable Electronic Fiber Sensor with High Stretchability and Rapid Response

Wang, Yunpeng; Niu, Wenbin; Lo, Chiao‐Yueh; Zhao, Yusen; He, Ximin; Zhang, Guorui; Wu, Shao-Yi; Ju, Benzhi; Zhang, Shufen

doi:10.1002/adfm.202000356

Cited by 77 publications

(77 citation statements)

References 65 publications

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“…[ 1–6 ] Indeed, the flexible electronics market is forecasted to increase annually by 11% and reach a market size major of 40 billion dollars by 2024. [ 7 ] One of the most established fields of stretchable electronics is strain sensing [ 3 ] which can be used in the motile parts of robots and machines, [ 4,8 ] record the movement and physiological signals in the human body [ 9–12 ] and measure mechanical deformation of solid structures. [ 13–18 ] The predominant figure of merit for strain sensors is a high gauge factor, i.e., the highest linear change in the electrical resistance as a function of deformation.…”

Section: Introductionmentioning

confidence: 99%

Graphene–Polyurethane Coatings for Deformable Conductors and Electromagnetic Interference Shielding

Cataldi

Papageorgiou

Pinter

et al. 2020

Adv Elect Materials

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Electrically conductive, polymeric materials that maintain their conductivity even when under significant mechanical deformation are needed for actuator electrodes, conformable electromagnetic shielding, stretchable tactile sensors, and flexible energy storage. The challenge for these materials is that the percolated, electrically conductive networks tend to separate even at low strains, leading to significant piezoresistance. Herein, deformable conductors are fabricated by spray‐coating a nitrile substrate with a graphene–elastomer solution. The electrical resistance of the coatings shows a decrease after thousands of bending cycles and a slight increase after repeated folding‐unfolding events. The deformable conductors double their electrical resistance at 12% strain and are washable without changing their electrical properties. The conductivity–strain behavior is modeled by considering the nanofiller separation upon deformation. To boost the conductivity at higher strains, the production process is adapted by stretching the nitrile substrate before spraying, after which it is released. This adaption meant that the electrical resistance doubles at 25% strain. The electrical resistance is found sufficiently low to give a 1.9 dB µm−1 shielding in the 8–12 GHz electromagnetic band. The physical and electrical properties, including the electro magnetic screening, of the flexible conductors, are found to deteriorate upon cycling but can be recovered through reheating the coating.

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Section: Introductionmentioning

confidence: 99%

Graphene–Polyurethane Coatings for Deformable Conductors and Electromagnetic Interference Shielding

Cataldi

Papageorgiou

Pinter

et al. 2020

Adv Elect Materials

View full text Add to dashboard Cite

show abstract

“…More recently, Wang et al. fabricated an electronic sensor with high stretchability and dynamic color‐switching that can monitor both macro‐ and micro‐movements of the human body and has applications in wearable electronics and soft robotics [123] . Of course, these applications constitute only the tip of the iceberg.…”

Section: Discussionmentioning

confidence: 99%

Chromic Platinum Complexes Containing Multidentate Ligands

2021

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Platinum(II) complexes display versatile chromic behavior as a consequence of their square planar geometry, which enables intra‐ and intermolecular Pt⋅⋅⋅Pt interactions via open axial coordination sites. These metallophilic interactions are known to generate metal‐metal‐to‐ligand‐charge transfer (MMLCT) transitions, in addition to the ligand‐to‐ligand charge transfer (LLCT) and metal‐to‐ligand‐charge‐transfer (MLCT) transitions that are already present. The electronic properties of such complexes, and consequently the magnitude and intensity of these transitions, can be modulated by various functional groups as well as environmental factors, affording control over the color and luminescence. The responsive behavior of these complexes makes them attractive candidates for chromic devices with applications in memory, encryption, sensors, and optoelectronics. This Minireview summarizes the mechanisms and reversibility of optical chromism in platinum(II) complexes, with a focus on the recent developments in the literature.

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“…neural pathways. [1,2] Up to now, a variety of soft bioelectronics have emerged to evaluate human health including body temperature, [3,4] heart rate, [5] pulse rate, [6] respiration, [7] and blood pressure, et al [8] However, these electronics-integrated materials are often limited by the complex fabrication processes, high cost, and low biosecurity. Therefore, developing updated materials with excellent biosafety and versatile sensory ability is highly demanded and imperative.…”

Section: Introductionmentioning

confidence: 99%

A Smart Patch with On‐Demand Detachable Adhesion for Bioelectronics

Shi

2021

Small

147

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A smart ionic skin patch with on‐demand detachable adhesion has been developed as human–machine interface for physiological signal monitoring. In spite of the multifunctions demonstrated by existing ionic skin, it is still difficult to distinguish different signals simultaneously. Moreover, the secondary damages to the tissues are often overlooked when the adhesive materials are removing from the wound. Herein, a multifunctional biomimetic hydrogel with temperature, mechanical, electrical, and pH response is developed. This hydrogel is designed by in situ polymerizing of hydrophilic anion monomers in a natural cationic polysaccharide to construct multifunctional biomimetic ionic channel. Due to the reversible physical cross‐linked network and thermosensitivity, the mechanical properties, adhesion, and visual effect of the hydrogel can be tuned by changing hydrogen bonding density via phase transition, thus making it an excellent biosafe material for wearable device. The hydrogel is utilized as skin patch intended for monitoring physiological signals stimulated by physical and chemical changes involving pressure, temperature, pH value, and electrocardiograph. Especially, this ionic skin patch can recognize temperature change signals precisely either in broad or extremely narrow temperature range. This smart skin patch can even recognize the pressure and temperature signals in real time and differentiate the signals simultaneously.

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Interactively Full‐Color Changeable Electronic Fiber Sensor with High Stretchability and Rapid Response

Cited by 77 publications

References 65 publications

Graphene–Polyurethane Coatings for Deformable Conductors and Electromagnetic Interference Shielding

Graphene–Polyurethane Coatings for Deformable Conductors and Electromagnetic Interference Shielding

Chromic Platinum Complexes Containing Multidentate Ligands

A Smart Patch with On‐Demand Detachable Adhesion for Bioelectronics

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