An ultraflexible organic differential amplifier for recording electrocardiograms

Sugiyama, Masahiro; Uemura, Tomomasa; Kondo, Masaya; Akiyama, Masayoshi; Namba, Naoko; Yoshimoto, Shusuke; Noda, Yoshifumi; Araki, Takeo; Sekitani, Tsuyoshi

doi:10.1038/s41928-019-0283-5

Cited by 137 publications

(130 citation statements)

References 39 publications

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“…However, traditional silicon‐based transistors have mechanical modulus mismatch with flexible e‐skin systems made up of elastomers. Although researchers have proposed several methods to integrate silicon‐based transistors with flexible systems by using geometrically designed wires to connect rigid islands, organic transistors with inherent flexibility can also be used.…”

Section: Artificial Biosignal Interfacesmentioning

confidence: 99%

Bioinspired Prosthetic Interfaces

Ali

Cheng

et al. 2020

Adv Materials Technologies

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Mechanical replacement prosthetics have advanced in both esthetics and mechanical functions, but still require progress in attaining full natural functionality via tactile feedback. Through bioinspiration of the somatosensory system, recent works in the development of materials and technologies at three critical interfaces have shown great advancements: skin‐inspired multifunctionality at the prosthetic level using flexible electronics, artificial transmission of the biosignals between the prosthesis and nervous system, and stimulation and recording of these signals with mechanically compliant, implantable neural interfaces. Herein, a systematic study of the artificial skin sensation pathways for the prosthetic interfaces is discussed together with the current state‐of‐the‐art technologies and prospective strategies to enable the complete sensory feedback loop in prosthetics through the use of biomimetic sensing platforms, artificial synapses, and neural interrogation electronics.

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Section: Artificial Biosignal Interfacesmentioning

confidence: 99%

Bioinspired Prosthetic Interfaces

Ali

Cheng

et al. 2020

Adv Materials Technologies

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“…Wearable and flexible electronics, such as ion‐sensor arrays, biosensor chips, and vital sensor patches,41–46 have attracted huge attentions due to their potential applications in healthcare. One important function of vital sensor is to monitor the heart rate and there are several different implementations for such function.…”

Section: Heart Rate Detectionmentioning

confidence: 99%

All‐Polymer High‐Performance Photodetector through Lamination

Xia

Aguirre

et al. 2020

Adv Elect Materials

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All‐polymer and semitransparent organic photodetectors (OPDs) fabricated through lamination on flexible substrates are demonstrated. Through lamination both bilayer and bulk heterojunction (BHJ) configurations for two different all‐polymer blends are easily made, and characterized in terms of detectivity, linear dynamic range (LDR), and bandwidth. These devices show high detectivity up to 1011 Jones. The importance of measured noise rather than estimated shot noise in detectivity calculation is discussed and emphasized. With this high detectivity and with the geometric flexibility due to the polymer materials, these detectors can be attached to curved surfaces for optical detection. Their use at fingertips for heart rate sensing is demonstrated. These devices also have a very wide bandwidth of more than 300 kHz and an LDR of 75 dB. As such the, roll‐to‐roll compatible lamination method shows great potential for high‐performance OPDs fabrication.

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“…As a novel alternative, one can consider a stretchable sensory-neuromorphic system. Again, skin-like electronic systems featuring self-adaptable data processability for unpredictable environments should exhibit various exceptional properties, such as i) mechanical matching in the integrated system 8,9 , ii) conformal contact for chronic high-quality signal acquisition 10,11 , iii) e cient pattern classi cation for improving sensing accuracy 12 , and iv) feedback-informative actuation in response to arti cial synaptic potentials 13,14 . The application of arti cial synapse modules to stretchable electronics, together with the monolithic integration, is inevitable for the realization of such unique sensory-neuromorphic systems.…”

Section: Introductionmentioning

confidence: 99%

A Bioinspired Stretchable Sensory-Neuromorphic System

Kim

Baek

Yoon

et al. 2020

Preprint

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Conventional stretchable electronics entailing the adoption of a wavy design, a neutral mechanical plane, and a conformal contact between abiotic and biotic interfaces have shown diverse skin-interfaced applications. Despite such remarkable progress, there have been challenged to be evolved to intelligent skin prosthetics due to the absence of the monolithic integration of neuromorphic constituents into individual sensing and actuating components. Herein, we demonstrate a golden tortoise beetle-inspired stretchable sensory-neuromorphic system comprising an artificial mechanoreceptor, an artificial synapse, and an epidermal photonic actuator as three biomimetic functionalities that correspond to a stretchable capacitive pressure sensor, a resistive random-access memory, and a quantum dot light-emitting diode, respectively. This system features a rigid-island structure interconnected with a sinter-free printable conductor (stretchability ~ 160%, conductivity ~ 18,550 S/cm), which allows one to improve both areal density and structural reliability while avoiding the thermal degradation of heat-sensitive stretchable electronic components. Moreover, even in the skin deformation range, the system accurately recognizes various patterned stimuli via an artificial neural network with training/inferencing functions. Our new bioinspired system is therefore expected to be an important step toward the implementation of intelligent wearable electronics.

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An ultraflexible organic differential amplifier for recording electrocardiograms

Cited by 137 publications

References 39 publications

Bioinspired Prosthetic Interfaces

Bioinspired Prosthetic Interfaces

All‐Polymer High‐Performance Photodetector through Lamination

A Bioinspired Stretchable Sensory-Neuromorphic System

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