Advances in Gel-Based Devices and Flexible Electronics (2nd Edition)

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

Deadline for manuscript submissions: 25 November 2024 | Viewed by 1225

Special Issue Editors

School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 10081, China
Interests: photonic crystal hydrogels; wearable intelligent sensing; energetic materials
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 10081, China
Interests: photonic crystal hydrogels; wearable intelligent sensing; energetic materials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

A hydrogel is a network system of polymers with a hydrophilic three-dimensional network cross-linked structure which can maintain a certain shape and absorb a large amount of water. Hydrogels have good biocompatibility and biodegradability; thus, these materials are widely used in drug delivery, tissue regeneration and other fields thanks to their excellent properties, making an indelible contribution to the development of biomedicine. Soft and stretchable materials based on hydrogels have skin/tissue-like mechanical properties, providing new avenues for the design and manufacture of wearable devices and flexible electronics. Hydrogels have mechanical and physiological properties similar to those of various organs in the human body, and have both electrical, mechanical, and biological functions which are controllable and diverse, making these materials one of the most ideal carriers of human–machine interfaces. Using bio-hydrogels as encapsulation materials, the development of fully degradable, implantable hydrogel-based flexible electronics in the human body will be a promising development direction. Although hydrogel-based flexible electronic devices have developed rapidly, many problems remain unresolved, such as adhesion of the hydrogel interface, hydrogel dehydration, and processing. We believe that it is time to re-examine the application of gels in flexible electronic devices to enable new developments and application directions for hydrogels. We look forward to submissions reporting new results on gel-based devices and flexible electronics, and welcome the submission of both theoretical and experimental studies.

Dr. Lili Qiu
Prof. Dr. Zihui Meng
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 submissions that pass pre-check are 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. Gels 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 2600 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

  • hydrogel
  • human–machine interface
  • gel-based devices
  • flexible electronics

Published Papers (1 paper)

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Research

19 pages, 5911 KiB  
Article
Superior Conductivity of Transparent ZnO/MoS2 Composite Films for Optoelectronic and Solar Cell Applications
by Shahad Tareq, Gokhan Kirkil and Bengü Özuğur Uysal
Gels 2023, 9(11), 906; https://doi.org/10.3390/gels9110906 - 16 Nov 2023
Viewed by 1058
Abstract
The use of transparent conductive oxides in optoelectronics created a revolution where new-generation materials with high transmittance, low sheet resistance values, durability, and portability can be achieved without decreasing efficiency or increasing costs. Transparent ZnO/MoS2 sandwich-structured conductive composite films were produced in [...] Read more.
The use of transparent conductive oxides in optoelectronics created a revolution where new-generation materials with high transmittance, low sheet resistance values, durability, and portability can be achieved without decreasing efficiency or increasing costs. Transparent ZnO/MoS2 sandwich-structured conductive composite films were produced in this study via the sol–gel method, which is considered the most efficient method due to its simple process and low cost. The crystal structure properties of ZnO/MoS2 were characterized via X-ray diffraction (XRD) patterns. The crystal sizes of ZnO films doped with different amounts of MoS2 were determined. A UV–visible absorption spectrometer was used to perform the spectroscopic analysis of the film. The area under the absorption curve and the full width of the half-maxima of absorbance data were calculated. Using these values, the optimum amount of MoS2 was determined for the best additive distribution. In addition, in order to determine the best transparent conductive material, resistance values measured via the four-point probe method were compared for different MoS2 additive amounts. The optical and electrical characterizations of transparent ZnO/MoS2 conductive oxide films were investigated. According to the parameters obtained via UV–vis spectroscopy, XRD, and four-point probe measurements, the most effective dispersion that exhibits a low width ratio and high resonance ratio was found for ZnO/MoS2 with a doping amount of 4 mg, the crystallite size of the films was found to be within the range of 21.5 and 24.6 nm, and these observations demonstrated a figure-of-merit value of more than 4.8 × 10−2 with respect to these sandwich-structured films. Compared to the values of previous studies on various transparent ZnO-doped conductive oxide materials, it is possible to claim that these new films have a structure that is very similar to the transparent conductivity characteristics of other films, and they may even be superior relative to some MoS2 amounts. Full article
(This article belongs to the Special Issue Advances in Gel-Based Devices and Flexible Electronics (2nd Edition))
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