Journal ArticleDOI
Self-Healable Multifunctional Electronic Tattoos Based on Silk and Graphene
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TLDR
In this article, a healing and multifunctional E-tattoo based on a graphene/silk fibroin/Ca2+ (Gr/SF/Ca 2+) combination is reported, which is capable of self-healing and sensing multistimuli.Abstract:
Electronic tattoos (E-tattoos), which can be intimately mounted on human skin for noninvasive and high-fidelity sensing, have attracted the attention of researchers in the field of wearable electronics. However, fabricating E-tattoos that are capable of self-healing and sensing multistimuli, similar to the inherent attributes of human skin, is still challenging. Herein, a healable and multifunctional E-tattoo based on a graphene/silk fibroin/Ca2+ (Gr/SF/Ca2+) combination is reported. The highly flexible E-tattoos are prepared through printing or writing using Gr/SF/Ca2+ suspension. The graphene flakes distributed in the matrix form an electrically conductive path that is responsive to environmental changes, such as strain, humidity, and temperature variations, endowing the E-tattoo with high sensitivity to multistimuli. The performance of the E-tattoo is investigated as a strain, humidity, and temperature sensor that shows high sensitivity, a fast response, and long-term stability. The E-tattoo is remarkably healed after damage by water because of the reformation of hydrogen and coordination bonds at the fractured interface. The healing efficiency is 100% in only 0.3 s. Finally, as proof of concept, its applications for monitoring of electrocardiograms, breathing, and temperature are shown. Based on its unique properties and superior performance, the Gr/SF/Ca2+ E-tattoo may be a promising candidate material for epidermal electronics.read more
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Journal ArticleDOI
Mechanically Flexible Conductors for Stretchable and Wearable E-Skin and E-Textile Devices
Binghao Wang,Antonio Facchetti +1 more
TL;DR: The basic characteristics and performance of several of these devices are reported, particularly focusing on the conducting element constituting them, among these devices, strain sensors of different types, energy storage elements, and power/energy storage and generators are included.
Journal ArticleDOI
Stretchable Electronics Based on PDMS Substrates.
TL;DR: The strategies for fabricating stretchable electronics on PDMS substrates are summarized, and the influence of the physical and chemical properties of PDMS, including surface chemical status, physical modulus, geometric structures, and self-healing properties, on the performance of stretchable Electronics is discussed.
Journal ArticleDOI
Silk-Based Advanced Materials for Soft Electronics.
TL;DR: The unique hierarchical and chemical structure of natural silk fibers, the fabrication strategies for processing silk into materials with versatile morphologies and into electrically conductive carbon materials, as well as recent progress in the development of silk-based advanced materials (silk materials and silk-derived carbon materials) for soft bioelectronics are highlighted.
Journal ArticleDOI
Flexible/Stretchable Supercapacitors with Novel Functionality for Wearable Electronics.
TL;DR: Recent advances in and future prospects for flexible/stretchable supercapacitors with innate functionalities are covered, including biodegradability, self-healing, shape memory, energy harvesting, and electrochromic and temperature tolerance, which can contribute to reducing e-waste.
Journal ArticleDOI
Mechanically and Electronically Robust Transparent Organohydrogel Fibers.
Jianchun Song,Shuo Chen,Lijie Sun,Yifan Guo,Luzhi Zhang,Shuliang Wang,Huixia Xuan,Qingbao Guan,Zhengwei You +8 more
TL;DR: Strain sensors made from the organohydrogel fibers accurately capture high‐frequency and high‐speed motion and exhibit little drift for 1000 stretch–release cycles, and are powerful for detecting rapid cyclic motions such as engine valves and are difficult to reach by previously reported conductive fibers.
References
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Journal ArticleDOI
Graphene: Status and Prospects
TL;DR: This review analyzes recent trends in graphene research and applications, and attempts to identify future directions in which the field is likely to develop.
Journal ArticleDOI
Increased Prevalence of Sleep-Disordered Breathing in Adults
TL;DR: The prevalence of sleep-disordered breathing in the United States for the periods of 1988-1994 and 2007-2010 is estimated using data from the Wisconsin Sleep Cohort Study, an ongoing community-based study with participants randomly selected from an employed population of Wisconsin adults.
Journal ArticleDOI
Electronic Transport Properties of Individual Chemically Reduced Graphene Oxide Sheets
Cristina Gómez-Navarro,R. Thomas Weitz,Alexander M. Bittner,Matteo Scolari,Alf Mews,Marko Burghard,Klaus Kern +6 more
TL;DR: Comparison of multilayered sheets revealed that the conductivity of the undermost layer is reduced by a factor of more than 2 as a consequence of the interaction with the Si/SiO2 substrate.
Journal ArticleDOI
Materials fabrication from Bombyx mori silk fibroin
Danielle N. Rockwood,Rucsanda C. Preda,Tuna Yucel,Xiaoqin Wang,Michael L. Lovett,David L. Kaplan +5 more
TL;DR: This protocol includes methods to extract silk from B. mori cocoons to fabricate hydrogels, tubes, sponges, composites, fibers, microspheres and thin films, used directly as biomaterials for implants, as scaffolding in tissue engineering and in vitro disease models, as well as for drug delivery.
Journal ArticleDOI
A wearable and highly sensitive pressure sensor with ultrathin gold nanowires
Shu Gong,Willem Heinrich Schwalb,Yongwei Wang,Yi Chen,Yue Tang,Jye Si,Bijan Shirinzadeh,Wenlong Cheng +7 more
TL;DR: An efficient, low-cost fabrication strategy to construct a highly sensitive, flexible pressure sensor by sandwiching ultrathin gold nanowire-impregnated tissue paper between two thin polydimethylsiloxane sheets is reported, enabling facile large-area integration and patterning for mapping spatial pressure distribution.