Wrinkled elastomers for the highly stretchable electrodes with excellent fatigue resistances

Lee, Gi-Bbeum; Sathi, Shibulal Gopi; Kim, Dae‐Yoon; Jeong, Kwang‐Un; Nah, Changwoon

doi:10.1016/j.polymertesting.2016.06.003

Cited by 19 publications

(19 citation statements)

References 38 publications

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“…The FE-SEM images showed the formation of wrinkles on the surface in the direction of stretching. The wrinkles seem to have occurred during cyclic stretching, which may contribute to an improvement in the mechanical stability of the layer 39,40 . In Fig.…”

Section: Transparent and Stretchable Electrodes On A 3d Micropatternementioning

confidence: 99%

A transparent stretchable sensor for distinguishable detection of touch and pressure by capacitive and piezoresistive signal transduction

et al. 2019

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Transparent stretchable (TS) sensors capable of detecting and distinguishing touch and pressure inputs are a promising development in wearable electronics. However, realization of such a device has been limited by difficulties in achieving optical transparency, stretchability, high sensitivity, stability, and distinguishable responsivity to two stimuli simultaneously. Herein, we report a TS sensor in which touch and pressure stimuli can be detected and distinguished on a substrate with a stress-relieving three-dimensional (3D) microstructured pattern providing multidirectional stretchability and increased pressure sensitivity. The TS capacitive device structure is a dielectric layer sandwiched between an upper piezoresistive electrode of a poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)/ionic liquid composite, which enables touch and pressure stimuli to be distinguished, and a lower electrode of metal/indium tin oxide/metal multilayer. The TS sensor array was demonstrated as a wearable input device for controlling a small vehicle. The TS touch-pressure sensor has great potential to be used as a multimodal input device for future wearable electronics.

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Section: Transparent and Stretchable Electrodes On A 3d Micropatternementioning

confidence: 99%

A transparent stretchable sensor for distinguishable detection of touch and pressure by capacitive and piezoresistive signal transduction

et al. 2019

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“…Mechanically durable and highly stretchable electrodes are inevitable to the development of flexible electronic devices for diverse applications such as stretchable displays, wearable motion detection electronics, intelligent sensor systems, dielectric elastomer actuators, and generators . For an ideal application point of view, electronic devices have an ability to stretch, bent, twisted, folded, and compressed into various shapes and sizes without irreversible mechanical damages and also maintain stable electrical performance . Conventional stretchable devices have faced mechanical damages and accidental fractures after static and dynamic mechanical deformations during their service life.…”

Section: Introductionmentioning

confidence: 99%

“…Sinusoidal wave‐like wrinkle morphology was created onto the surface of the substrate by prestretched technique. This enables the development of intelligent surfaces to further realization of remarkable stretchability in stretchable thin‐film electrodes …”

Section: Introductionmentioning

confidence: 99%

“…Basically, polymeric materials are widely used in various applications including stretchable electrodes, stretchable EMI shield material, and stretchable electronic materials . Silicone rubber (SR) coated acrylic rubber (AR) substrate is very advantageous for wearable electronics because of its high biocompatibility, high ductility, and excellent stretchability . In the last decades, stretchable electrodes have made proper development with many conductive nanomaterials, including nanoparticles, nanowires, nanotubes, and graphene .…”

Section: Introductionmentioning

confidence: 99%

“…Herein, we report that Ag ink‐based elastomeric electrode formed on a SR coated AR substrate can simultaneously attain high stretchability and stable electrical conductivity. Drawing inspiration from previous works, we fabricated an IPN assisted AR/SR electrode to enhance further performances of stretchable electrode. The surface of the substrate was transformed into sinusoidal wrinkle shaped structures by the application of prestrain technology.…”

Section: Introductionmentioning

confidence: 99%

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Highly stretchable wrinkled electrode based on silver ink‐elastomer nanocomposite with excellent fatigue resistance

et al. 2020

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Flexible and stretchable electrodes have attracted immense attention because of their various electronic applications on the wearable sensing electronics, but challenges regarding robust and sustainable electrical performance under static and dynamic mechanical stresses still need to be overcome. Herein, with a simple effective strategy, a highly serviceable and flexible elastomeric electrode fabricated by utilizing an interpenetrating network between acrylic rubber (AR) and silicone rubber (SR), and silver (Ag) ink to increase electrical conductivity, is introduced. Oxygen (O2) plasma and sodium dodecyl sulfate (SDS) treatment on wrinkle substrate surface lead to robust adhesion of Ag ink layer, results in high electrical conductivity. Wrinkle morphology can help to stably maintain the continuous conductive Ag network during static and dynamic deformation. This stretchable electrode possessing properties such as robust and stable electrical conductivity of ~103 S/cm under 150% static tensile deformations and good sustainability after 1000 cycles of dynamic tensile deformations is a promising candidate for stretchable wearable electronics.

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Highly Stretchable, Compliant, Polymeric Microelectrode Arrays for In Vivo Electrophysiological Interfacing

et al. 2017

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Polymeric microelectrode arrays (MEAs) are emerging as a new generation of biointegrated microelectrodes to transduce original electrochemical signals in living tissues to external electrical circuits, and vice versa. So far, the challenge of stretchable polymeric MEAs lies in the competition between high stretchability and good electrode-substrate adhesion. The larger the stretchability, the easier the delamination of electrodes from the substrate due to the mismatch in their Young's modulus. In this work, polypyrrole (PPy) electrode materials are designed, with PPy nanowires integrated on the high conductive PPy electrode arrays. By utilizing this electrode material, for the first time, stretchable polymeric MEAs are fabricated with both high stretchability (≈100%) and good electrode-substrate adhesion (1.9 MPa). In addition, low Young's modulus (450 kPa), excellent recycling stability (10 000 cycles of stretch), and high conductivity of the MEAs are also achieved. As a proof of concept, the as-prepared polymeric MEAs are successfully used for conformally recording the electrocorticograph signals from rats in normal and epileptic states, respectively. Further, these polymeric MEAs are also successful in stimulating the ischiadic nerve of the rat. This strategy provides a new perspective to the highly stretchable and mechanically stable polymeric MEAs, which are vital for compliant neural electrodes.

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Wrinkled elastomers for the highly stretchable electrodes with excellent fatigue resistances

Cited by 19 publications

References 38 publications

A transparent stretchable sensor for distinguishable detection of touch and pressure by capacitive and piezoresistive signal transduction

A transparent stretchable sensor for distinguishable detection of touch and pressure by capacitive and piezoresistive signal transduction

Highly stretchable wrinkled electrode based on silver ink‐elastomer nanocomposite with excellent fatigue resistance

Highly Stretchable, Compliant, Polymeric Microelectrode Arrays for In Vivo Electrophysiological Interfacing

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