Special Issue "Flexible Electronics for Wearable and Implantable Health Care Applications"

A special issue of Micromachines (ISSN 2072-666X). This special issue belongs to the section "B:Biology and Biomedicine".

Deadline for manuscript submissions: 31 August 2020.

Special Issue Editors

Dr. Hoang-Phuong Phan
Website
Guest Editor
Queensland Micro and Nanotechnology Centre, Griffith University, Australia
Interests: MEMS/NEMS; piezoresistive and piezoelectric materials; sensors for harsh environments; strain engineering
Special Issues and Collections in MDPI journals
Prof. Dr. Nam-Trung Nguyen
Website SciProfiles
Guest Editor
Queensland Micro- and Nanotechnology Centre, Griffith University, West Creek Road, Nathan, Queensland 4111, Australia
Interests: microfluidics; nanofluidics; micro/nanomachining technologies; micro/nanoscale science; instrumentation for biomedical applications
Special Issues and Collections in MDPI journals

Special Issue Information

Dear Colleagues,

Flexible electronics have attracted great attention of interest owing to their unprecedented properties over conventional bulk-semiconductor base devices. In the last decade, the development of flexible electronics has been continuously advanced from materials, design concepts to innovative fabrication technologies. Their applications can be found in a broad range of industries including energy, medicine, and robotics. In health care and medical applications, flexible electronics offers new functionalities such as smart wears and epidermal sensors that can be directly mounted onto skin to track different biophysiological parameters from users. The capability to form conformal contacts with soft bio-tissue also opens new paradigm for implantable electronics in neurological signalling and simulating, thereby leveraging advances in disease diagnosis and treatment.

This issue seeks for review papers and technical reports on flexible electronics for health care applications. It aims to provide the readers a comprehensive and broad view on the state-of-the-art and future perspective of soft electronics for biological sensing. In particular, this issue includes but is not limit to the following topics:

  • Wearable and stretchable mechanical sensors
  • Wearable bio-chemical sensors
  • Implantable electronics
  • Biodegradable materials
  • Functional electronic materials and smart designs for stretchable electronics
  • Energy storage and harvesting technologies for soft electronics

Dr. Hoang-Phuong Phan
Prof. Nam-Trung Nguyen
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Micromachines is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Wearable and stretchable mechanical sensors
  • Wearable bio-chemical sensors
  • Implantable electronics
  • Biodegradable materials
  • Functional electronic materials and smart designs for stretchable electronics
  • Energy storage and harvesting technologies for soft electronics

Published Papers (1 paper)

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Research

Open AccessArticle
Preparing Polypyrrole-Coated Stretchable Textile via Low-Temperature Interfacial Polymerization for Highly Sensitive Strain Sensor
Micromachines 2019, 10(11), 788; https://doi.org/10.3390/mi10110788 - 17 Nov 2019
Cited by 2
Abstract
The stretchable sensor has been considered as the most important component in a wearable device. However, it is still a great challenge to develop a highly sensitive textile-based strain sensor with good flexibility, excellent skin affinity, and large dynamic range. Herein, polypyrrole (PPy) [...] Read more.
The stretchable sensor has been considered as the most important component in a wearable device. However, it is still a great challenge to develop a highly sensitive textile-based strain sensor with good flexibility, excellent skin affinity, and large dynamic range. Herein, polypyrrole (PPy) was immobilized on a stretchable textile knitted by polyester and spandex via low-temperature interfacial polymerization to prepare a conductive strain sensor for human motion and respiration measurements. Scanning electron microscopy, Fourier transform infrared spectrometry, and thermal gravimetric data verify that a thin layer of PPy has been successfully coated on the textile with a high density and very uniform distribution. The resistance of the as-prepared textile is 21.25 Ω/cm2 and the PPy-coated textile could be used as an electric conductor to light up a LED lamp. Moreover, the textile could tolerate folding at an angle of 180° and 500 times of bending-twisting cycles without significant changes on its resistance. A negative correlation between the resistance change and the applied strain is observed for the textile-based sensor in the strain ranging from 0 to 71% with the gauge factor of −0.46. After more than 200 cycles of stretching-releasing under the strain of 26%, there is no obvious alteration on the sensing responses. The sensors were attached on volunteers’ body or clothes for the real-time measurement of human motions and respiration, demonstrating that the textile-based sensor could sensitively detect finger, elbow, and knee bending and differentiate deep, normal, and fast breath. This work may provide an approach to uniform and dense coating conductive polymers on textiles for highly sensitive and stretchable sensors, which possess great potentials in practical applications for real-time monitoring human motions and physiological signs. Full article
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