Recent Advances in Wearable Gel-Based Flexible Electronics

A special issue of Gels (ISSN 2310-2861). This special issue belongs to the section "Gel Applications".

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 6391

Special Issue Editors


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Guest Editor
Frontiers Science Center for Flexible Electronics (FSCFE), Xi'an Institute of Flexible Electronics (IFE) & Xi'an Institute of Biomedical Materials and Engineering (IBME), Northwestern Polytechnical University (NPU), Xi'an 710072, China
Interests: flexible electronics; conductive hydrogels; polymeric biomaterials; antibacterial polymers; nanomaterials
School of Materials Science & Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, China
Interests: biomass-based hydrogels; responsive hydrogels; functional composites

Special Issue Information

Dear Colleagues,

Society has rapidly progressed in recent decades from the industrial revolution to the era of digital innovation. Digital technology allows for robust, convenient, and on-demand information acquisition. Flexible electronics-based wearable devices, from jewelry to clothing, are probably one of the digital technologies that we have the closest contact with. These devices do not just function as usual electronics, but they come into contact with our body and operate as a tracker to help us to trace our physical activities and understand the physiological status of our body, e.g., steps and heartbeat. Gels offer significant advantages when it comes to the development of wearable devices as they possess unique properties such as light weight, stretchability, etc. The incorporation of gels in wearable devices allows better conformality of wearable devices to surfaces, offering improved protection, comfort, and performance stability. This Special Issue aims to highlight the state of the art of wearable gel-based devices.

Dr. Tengjiao Wang
Dr. Chen Qian
Guest Editors

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Keywords

  • wearable devices
  • flexible electronics
  • conductive gels
  • biocompatible materials
  • healthcare

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Published Papers (2 papers)

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Research

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18 pages, 4997 KiB  
Article
Low-Temperature and UV Irradiation Effect on Transformation of Zirconia -MPS nBBs-Based Gels into Hybrid Transparent Dielectric Thin Films
by Viorica Muşat, Elena Emanuela Herbei, Elena Maria Anghel, Michael P. M. Jank, Susanne Oertel, Daniel Timpu and Laurenţiu Frangu
Gels 2022, 8(2), 68; https://doi.org/10.3390/gels8020068 (registering DOI) - 20 Jan 2022
Cited by 1 | Viewed by 2264
Abstract
Bottom-up approaches in solutions enable the low-temperature preparation of hybrid thin films suitable for printable transparent and flexible electronic devices. We report the obtainment of new transparent PMMA/ZrO2 nanostructured -building blocks (nBBs) hybrid thin films (61–75 nm) by a modified sol-gel method [...] Read more.
Bottom-up approaches in solutions enable the low-temperature preparation of hybrid thin films suitable for printable transparent and flexible electronic devices. We report the obtainment of new transparent PMMA/ZrO2 nanostructured -building blocks (nBBs) hybrid thin films (61–75 nm) by a modified sol-gel method using zirconium ethoxide, Zr(OEt)4, and 3-methacryloxypropyl trimethoxysilane (MPS) as a coupling agent and methylmethacrylate monomer (MMA). The effect of low-temperature and UV irradiation on the nBBs gel films is discussed. The thermal behaviors of the hybrid sols and as-deposed gel films were investigated by modulated thermogravimetric (mTG) and differential scanning calorimetry (DSC) analysis. The chemical structure of the resulted films was elucidated by X-ray photoelectron (XPS), infrared (IR) and Raman spectroscopies. Their morphology and crystalline structure were observed by scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HR-TEM), and grazing incidence X-ray diffraction. The cured films show zirconia nanocrystallites of 2–4 nm in the hybrid matrix and different self-assembled structures for 160 °C or UV treatment; excellent dielectric behavior, with dielectric constant values within 6.7–17.9, depending on the Zr(OEt)4:MMA molar ratio, were obtained. Full article
(This article belongs to the Special Issue Recent Advances in Wearable Gel-Based Flexible Electronics)
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Review

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18 pages, 2022 KiB  
Review
Self-Healing Materials-Based Electronic Skin: Mechanism, Development and Applications
by Jingjie Chen, Lei Wang, Xiangou Xu, Guming Liu, Haoyan Liu, Yuxuan Qiao, Jialin Chen, Siwei Cao, Quanbin Cha and Tengjiao Wang
Gels 2022, 8(6), 356; https://doi.org/10.3390/gels8060356 - 6 Jun 2022
Cited by 18 | Viewed by 3431
Abstract
Electronic skin (e-skin) has brought us great convenience and revolutionized our way of life. However, due to physical or chemical aging and damage, they will inevitably be degraded gradually with practical operation. The emergence of self-healing materials enables e-skins to achieve repairment of [...] Read more.
Electronic skin (e-skin) has brought us great convenience and revolutionized our way of life. However, due to physical or chemical aging and damage, they will inevitably be degraded gradually with practical operation. The emergence of self-healing materials enables e-skins to achieve repairment of cracks and restoration of mechanical function by themselves, meeting the requirements of the era for building durable and self-healing electronic devices. This work reviews the current development of self-healing e-skins with various application scenarios, including motion sensor, human–machine interaction and soft robots. The new application fields and present challenges are discussed; meanwhile, thinkable strategies and prospects of future potential applications are conferenced. Full article
(This article belongs to the Special Issue Recent Advances in Wearable Gel-Based Flexible Electronics)
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