Journal ArticleDOI
Ultrasensitive mechanical crack-based sensor inspired by the spider sensory system
Daeshik Kang,Peter V. Pikhitsa,Yong Whan Choi,Chanseok Lee,Sung Soo Shin,Linfeng Piao,Byeonghak Park,Kahp-Yang Suh,Tae Il Kim,Mansoo Choi +9 more
TLDR
It is demonstrated that sensors based on nanoscale crack junctions and inspired by the geometry of a spider’s slit organ can attain ultrahigh sensitivity and serve multiple purposes, and that they are applicable to highly selective speech pattern recognition and the detection of physiological signals.Abstract:
Recently developed flexible mechanosensors based on inorganic silicon, organic semiconductors, carbon nanotubes, graphene platelets, pressure-sensitive rubber and self-powered devices are highly sensitive and can be applied to human skin. However, the development of a multifunctional sensor satisfying the requirements of ultrahigh mechanosensitivity, flexibility and durability remains a challenge. In nature, spiders sense extremely small variations in mechanical stress using crack-shaped slit organs near their leg joints. Here we demonstrate that sensors based on nanoscale crack junctions and inspired by the geometry of a spider's slit organ can attain ultrahigh sensitivity and serve multiple purposes. The sensors are sensitive to strain (with a gauge factor of over 2,000 in the 0-2 per cent strain range) and vibration (with the ability to detect amplitudes of approximately 10 nanometres). The device is reversible, reproducible, durable and mechanically flexible, and can thus be easily mounted on human skin as an electronic multipixel array. The ultrahigh mechanosensitivity is attributed to the disconnection-reconnection process undergone by the zip-like nanoscale crack junctions under strain or vibration. The proposed theoretical model is consistent with experimental data that we report here. We also demonstrate that sensors based on nanoscale crack junctions are applicable to highly selective speech pattern recognition and the detection of physiological signals. The nanoscale crack junction-based sensory system could be useful in diverse applications requiring ultrahigh displacement sensitivity.read more
Citations
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Journal ArticleDOI
Stretchable, Skin-Mountable, and Wearable Strain Sensors and Their Potential Applications: A Review
TL;DR: In this article, the authors present recent advancements in the development of flexible and stretchable strain sensors, including skin-mountable and wearable strain sensors for personalized health-monitoring, human motion detection, human-machine interfaces, soft robotics, and so forth.
Journal ArticleDOI
Flexible and Stretchable Physical Sensor Integrated Platforms for Wearable Human-Activity Monitoringand Personal Healthcare.
Tran Quang Trung,Nae-Eung Lee +1 more
TL;DR: The latest successful examples of flexible and stretchable physical sensors for the detection of temperature, pressure, and strain, as well as their novel structures, technological innovations, and challenges, are reviewed.
Journal ArticleDOI
Skin-inspired highly stretchable and conformable matrix networks for multifunctional sensing
Qilin Hua,Junlu Sun,Haitao Liu,Rongrong Bao,Ruomeng Yu,Junyi Zhai,Caofeng Pan,Zhong Lin Wang,Zhong Lin Wang +8 more
TL;DR: A skin-inspired highly stretchable and conformable matrix network (SCMN) that successfully expands the e-skin sensing functionality including but not limited to temperature, in-plane strain, humidity, light, magnetic field, pressure, and proximity is presented.
Journal ArticleDOI
A soft, wearable microfluidic device for the capture, storage, and colorimetric sensing of sweat
Ahyeon Koh,Daeshik Kang,Daeshik Kang,Yeguang Xue,Seungmin Lee,Rafal M. Pielak,Jeonghyun Kim,Jeonghyun Kim,Taehwan Hwang,Seunghwan Min,Anthony Banks,Philippe Bastien,Megan Manco,Liang Wang,Liang Wang,Kaitlyn R. Ammann,Kyung In Jang,Phillip Won,Seungyong Han,Roozbeh Ghaffari,Ungyu Paik,Marvin J. Slepian,Guive Balooch,Yonggang Huang,John A. Rogers +24 more
TL;DR: A flexible microfluidic device that adheres to human skin that collects and analyzes sweat during exercise and could be used during athletic or military training and adapted to test other bodily fluids such as tears or saliva is developed.
Journal ArticleDOI
Stretchable, Transparent, Ultrasensitive, and Patchable Strain Sensor for Human-Machine Interfaces Comprising a Nanohybrid of Carbon Nanotubes and Conductive Elastomers.
TL;DR: A stretchable, transparent, ultrasensitive, and patchable strain sensor that is made of a novel sandwich-like stacked piezoresisitive nanohybrid film of single-wall carbon nanotubes and a conductive elastomeric composite of polyurethane (PU)-poly(3,4-ethylenedioxythiophene) polystyrenesulfonate is described.
References
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Takeo Yamada,Yuhei Hayamizu,Yuki Yamamoto,Yoshiki Yomogida,Ali Izadi-Najafabadi,Don N. Futaba,Kenji Hata +6 more
TL;DR: A class of wearable and stretchable devices fabricated from thin films of aligned single-walled carbon nanotubes capable of measuring strains up to 280% with high durability, fast response and low creep is reported.
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An ultra-lightweight design for imperceptible plastic electronics
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A large-area, flexible pressure sensor matrix with organic field-effect transistors for artificial skin applications
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Journal ArticleDOI
Nanowire active-matrix circuitry for low-voltage macroscale artificial skin
Kuniharu Takei,Toshitake Takahashi,Toshitake Takahashi,Johnny C. Ho,Johnny C. Ho,Hyunhyub Ko,Andrew G. Gillies,Paul W. Leu,Paul W. Leu,Ronald S. Fearing,Ali Javey,Ali Javey +11 more
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