Journal ArticleDOI
A transparent bending-insensitive pressure sensor
Sungwon Lee,Sungwon Lee,Amir Reuveny,Amir Reuveny,Jonathan T. Reeder,Sunghoon Lee,Sunghoon Lee,Hanbit Jin,Hanbit Jin,Qihan Liu,Tomoyuki Yokota,Tomoyuki Yokota,Tsuyoshi Sekitani,Tsuyoshi Sekitani,Takashi Isoyama,Yusuke Abe,Zhigang Suo,Takao Someya,Takao Someya +18 more
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TLDR
This work shows real-time (response time of ∼20 ms), large-area, normal pressure monitoring under different, complex bending conditions, and test the suitability of the sensor for soft robotics and medical applications.Abstract:
Measuring small normal pressures is essential to accurately evaluate external stimuli in curvilinear and dynamic surfaces such as natural tissues. Usually, sensitive and spatially accurate pressure sensors are achieved through conformal contact with the surface; however, this also makes them sensitive to mechanical deformation (bending). Indeed, when a soft object is pressed by another soft object, the normal pressure cannot be measured independently from the mechanical stress. Here, we show a pressure sensor that measures only the normal pressure, even under extreme bending conditions. To reduce the bending sensitivity, we use composite nanofibres of carbon nanotubes and graphene. Our simulations show that these fibres change their relative alignment to accommodate bending deformation, thus reducing the strain in individual fibres. Pressure sensitivity is maintained down to a bending radius of 80 μm. To test the suitability of our sensor for soft robotics and medical applications, we fabricated an integrated sensor matrix that is only 2 μm thick. We show real-time (response time of ∼20 ms), large-area, normal pressure monitoring under different, complex bending conditions. A composite fibrous material made of carbon nanotubes and graphene responds to small pressure but not to bending deformation.read more
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Journal ArticleDOI
Pursuing prosthetic electronic skin.
Alex Chortos,Jia Liu,Zhenan Bao +2 more
TL;DR: This Review will cover materials and devices designed for mimicking the skin's ability to sense and generate biomimetic signals.
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
Electronic Skin: Recent Progress and Future Prospects for Skin‐Attachable Devices for Health Monitoring, Robotics, and Prosthetics
TL;DR: Recent progress in electronic skin or e‐skin research is broadly reviewed, focusing on technologies needed in three main applications: skin‐attachable electronics, robotics, and prosthetics.
Journal ArticleDOI
A bioinspired flexible organic artificial afferent nerve
Yeongin Kim,Alex Chortos,Wentao Xu,Wentao Xu,Yuxin Liu,Jin Young Oh,Jin Young Oh,Dong Hee Son,Jiheong Kang,Amir M. Foudeh,Chenxin Zhu,Yeongjun Lee,Simiao Niu,Jia Liu,Raphael Pfattner,Zhenan Bao,Tae-Woo Lee +16 more
TL;DR: Flexible organic electronics are used to mimic the functions of a biological afferent nerve and construct a hybrid bioelectronic reflex arc to actuate muscles that has potential applications in neurorobotics and neuroprosthetics.
Journal ArticleDOI
Inflammation-free, gas-permeable, lightweight, stretchable on-skin electronics with nanomeshes
Akihito Miyamoto,Sungwon Lee,Sungwon Lee,Nawalage Florence Cooray,Sunghoon Lee,Mami Mori,Naoji Matsuhisa,Hanbit Jin,Leona Yoda,Tomoyuki Yokota,Akira Itoh,Masaki Sekino,Hiroshi Kawasaki,Tamotsu Ebihara,Masayuki Amagai,Takao Someya,Takao Someya +16 more
TL;DR: This work shows the successful fabrication of inflammation-free, highly gas-permeable, ultrathin, lightweight and stretchable sensors that can be directly laminated onto human skin for long periods of time, realized with a conductive nanomesh structure.
References
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Book
Cellular Solids: Structure and Properties
Lorna J. Gibson,Michael F. Ashby +1 more
TL;DR: The linear elasticity of anisotropic cellular solids is studied in this article. But the authors focus on the design of sandwich panels with foam cores and do not consider the properties of the materials.
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Nandana Bhardwaj,Subhas C. Kundu +1 more
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Journal ArticleDOI
Skin-like pressure and strain sensors based on transparent elastic films of carbon nanotubes
Darren J. Lipomi,Michael Vosgueritchian,Benjamin C. K. Tee,Sondra L. Hellstrom,Jennifer A. Lee,Courtney H. Fox,Zhenan Bao +6 more
TL;DR: Transparent, conducting spray-deposited films of single-walled carbon nanotubes are reported that can be rendered stretchable by applying strain along each axis, and then releasing this strain.
Journal ArticleDOI
Highly sensitive flexible pressure sensors with microstructured rubber dielectric layers
Stefan C. B. Mannsfeld,Benjamin C. K. Tee,Randall M. Stoltenberg,Christopher V. H. H. Chen,Soumendra N. Barman,Beinn V.O. Muir,Anatoliy N. Sokolov,Colin Reese,Zhenan Bao +8 more
TL;DR: Flexible, capacitive pressure sensors with unprecedented sensitivity and very short response times that can be inexpensively fabricated over large areas by microstructuring of thin films of the biocompatible elastomer polydimethylsiloxane are demonstrated.
Journal ArticleDOI
An ultra-lightweight design for imperceptible plastic electronics
Martin Kaltenbrunner,Tsuyoshi Sekitani,Tsuyoshi Sekitani,Jonathan T. Reeder,Jonathan T. Reeder,Tomoyuki Yokota,Kazunori Kuribara,Takeyoshi Tokuhara,Michael Drack,Reinhard Schwödiauer,Ingrid Graz,Simona Bauer-Gogonea,Siegfried Bauer,Takao Someya,Takao Someya +14 more
TL;DR: In this paper, the authors present a platform that makes electronics both virtually unbreakable and imperceptible on polyimide polysilicon elastomers, which can be operated at high temperatures and in aqueous environments.