Active Matrix Electronic Skin Strain Sensor Based on Piezopotential‐Powered Graphene Transistors

Sun, Qijun; Seung, Wanchul; Kim, Beom Joon; Seo, Soonmin; Kim, Sang Woo; Cho, Jeong Ho

doi:10.1002/adma.201500582

Cited by 307 publications

(244 citation statements)

References 42 publications

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“…And they have the advantage of low power consumption, high sensitivity and ultrafast response 95. Recently, P(VDF‐TrFE) polymer material and Zinc oxide naowires have been used in developing piezoelectric strain sensors 95, 96, 97.…”

Section: Recent Progress In Biomedical Applicationsmentioning

confidence: 99%

Recent Progress on Piezoelectric and Triboelectric Energy Harvesters in Biomedical Systems

et al. 2017

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Implantable medical devices (IMDs) have become indispensable medical tools for improving the quality of life and prolonging the patient's lifespan. The minimization and extension of lifetime are main challenges for the development of IMDs. Current innovative research on this topic is focused on internal charging using the energy generated by the physiological environment or natural body activity. To harvest biomechanical energy efficiently, piezoelectric and triboelectric energy harvesters with sophisticated structural and material design have been developed. Energy from body movement, muscle contraction/relaxation, cardiac/lung motions, and blood circulation is captured and used for powering medical devices. Other recent progress in this field includes using PENGs and TENGs for our cognition of the biological processes by biological pressure/strain sensing, or direct intervention of them for some special self‐powered treatments. Future opportunities lie in the fabrication of intelligent, flexible, stretchable, and/or fully biodegradable self‐powered medical systems for monitoring biological signals and treatment of various diseases in vitro and in vivo.

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Section: Recent Progress In Biomedical Applicationsmentioning

confidence: 99%

Recent Progress on Piezoelectric and Triboelectric Energy Harvesters in Biomedical Systems

et al. 2017

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“…Reproduced with permission. [134] f) Photograph of three transparent graphene strain sensors in a rosette arrangement. Reproduced with permission.…”

Section: Capacitive Strain Sensorsmentioning

confidence: 99%

“…[107] When the applied strain is released, it is difficult for the nanomaterials to slide back to the initial position or for the cracks to be completely closed. Due to the viscoelasticity of polymers and the friction between the nanomaterials and the polymer matrix during loading and unloading, rearrangement of nanomaterials Polyaniline doped AuNW/Latex rubber [68] Resistive 2-12 for 0-100% 149.6% -Human finger-controlled robotic arm system AuNW/Latex rubber [44] Resistive 9.9 (0-5%), 6.9 (5-50%) 300% 0.01% Data glove, monitoring of forearm muscle movement, cheek movement, phonation, and wrist pulse AgNW/Ecoflex/AgNW [41] Capacitive 0.7 50% -Monitoring of finger bending and knee motion CNT/Ecoflex/CNT [25] Capacitive 0.4 50% --CNT/silicone/CNT [127] Capacitive 0.99 100% -Robotic linkage CNT/Dragon Skin/CNT [129] Capacitive 1 300% -Date glove, monitoring of balloon inflation and chest movement PVDF-TrFE with graphene FET [134] Piezoelectric 389 ≈0.3% 0.008% Monitoring of hand movement ZnO NW array [132] Piezoelectric 1813 0.8% --Carbon fiber-ZnO NW [217] Piezoelectric 60-80 1.2% 0.2% -www.advancedsciencenews.com www.advhealthmat. de and opening of cracks results in time delay between electrical output and mechanical input.…”

Section: Resistive Strain Sensorsmentioning

confidence: 99%

“…Various piezoelectric materials such as ZnO nanostructures, [40,132,133] poly(vinylidenefluoride-co-trifluoroethylene) (PVDF-TrFE) [134] and polylactic acid (PLA) [22] have been used to develop wearable strain sensors. For instance, a wearable piezoelectric bending sensor was fabricated using ZnO nanorods (NRs) as strain sensing materials and AgNW-SWCNT composites as electrodes.…”

Section: Piezoelectric Strain Sensorsmentioning

confidence: 99%

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Nanomaterial‐Enabled Wearable Sensors for Healthcare

Yao

Swetha

Zhu

2017

Adv Healthcare Materials

469

296

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humidity level, and concentration of harmful gases, and airborne particulates can provide valuable information for the prediction, management, and treatment of chronic diseases. [4,5] In addition to the applications in wearable health monitoring, continuous tracking of daily and sports activities can offer an efficient way to assess the well-being and athletic performances. [6] In order to ensure a robust and conformal contact with the curvilinear, coarse, and dynamic surface of skin without impeding daily activities, the wearable sensor should have low modulus and high stretchability. The epidermis has a modulus of 140-600 kPa while the dermis has an even lower modulus of 2-80 kPa. [7] Skin itself can be stretched elastically up to 15% and with the help of wrinkles and creases, the overall stretchability can reach as high as 100% during daily motions. [8] In addition to good wearability, wearable sensors should be highly sensitive, lightweight, low-cost, and with low power consumption. To achieve these features, nanomaterials that are compliant, possessing larger surface area and exceptional material properties, and compatible with low-cost fabrication processes are widely employed as building blocks for developing wearable sensors.In this review, we start from a brief overview of nanomaterials, their related structural designs and fabrication processes (Section 2). Following that, recent advances of nanomaterialenabled wearable sensors including temperature, electrophysiological, strain, tactile, electrochemical, and other sensors will be summarized (Section 3). A survey on the integration of multiple sensors and other components into wearable systems will be given in Section 4. The application of nanomaterialenabled wearable sensors for healthcare including health monitoring, activity tracking, and electronic skin will be presented in Section 5. The challenges and opportunities will be discussed at the end. Nanomaterials, Structural Designs, and Fabrication ProcessesNanomaterials can be classified into two categories-top-down fabricated ones and bottom-up synthesized ones. [9] The focus of this review is on the wearable sensors based on bottom-up synthesized nanomaterials. Nanomaterials can be synthesized into various dimensions, from 0D such as metallic nanoparticles (NPs), to 1D such as carbon nanotubes (CNTs), and metallic nanowires (NWs), to 2D such as graphene and transition metal Highly sensitive wearable sensors that can be conformably attached to human skin or integrated with textiles to monitor the physiological parameters of human body or the surrounding environment have garnered tremendous interest. Owing to the large surface area and outstanding material properties, nanomaterials are promising building blocks for wearable sensors. Recent advances in the nanomaterial-enabled wearable sensors including temperature, electrophysiological, strain, tactile, electrochemical, and environmental sensors are presented in this review. Integration of multiple sensors for multimodal sensing and integration with...

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“…Complicated tactile sensing system under bland skin is illustrated in Figure 15 . At present, pressure sensors are primarily based on the strength induced variation in capacitance,149, 150 piezoelectricity,151, 152 resistivity,17 triboelectricity 153. And graphene has been applied in the design of light and wearable pressure sensors.…”

Section: The Human‐like Senses and Feedbacksmentioning

confidence: 99%

Human‐Like Sensing and Reflexes of Graphene‐Based Films

et al. 2016

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Humans have numerous senses, wherein vision, hearing, smell, taste, and touch are considered as the five conventionally acknowledged senses. Triggered by light, sound, or other physical stimulations, the sensory organs of human body are excited, leading to the transformation of the afferent energy into neural activity. Also converting other signals into electronical signals, graphene‐based film shows its inherent advantages in responding to the tiny stimulations. In this review, the human‐like senses and reflexes of graphene‐based films are presented. The review starts with the brief discussions about the preparation and optimization of graphene‐based film, as where as its new progress in synthesis method, transfer operation, film‐formation technologies and optimization techniques. Various human‐like senses of graphene‐based film and their recent advancements are then summarized, including light‐sensitive devices, acoustic devices, gas sensors, biomolecules and wearable devices. Similar to the reflex action of humans, graphene‐based film also exhibits reflex when under thermal radiation and light actuation. Finally, the current challenges associated with human‐like applications are discussed to help guide the future research on graphene films. At last, the future opportunities lie in the new applicable human‐like senses and the integration of multiple senses that can raise a revolution in bionic devices.

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Active Matrix Electronic Skin Strain Sensor Based on Piezopotential‐Powered Graphene Transistors

Cited by 307 publications

References 42 publications

Recent Progress on Piezoelectric and Triboelectric Energy Harvesters in Biomedical Systems

Recent Progress on Piezoelectric and Triboelectric Energy Harvesters in Biomedical Systems

Nanomaterial‐Enabled Wearable Sensors for Healthcare

Human‐Like Sensing and Reflexes of Graphene‐Based Films

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