Polymer Gels for Sensor Applications

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

Deadline for manuscript submissions: 30 September 2025 | Viewed by 548

Special Issue Editors


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Guest Editor
Centre for Textile Science and Technology (2C2T), University of Minho, 4800-056 Guimarães, Portugal
Interests: sol-gel hybrid; sensing; environmental monitoring; material synthesis and characterization; sol-gel process

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Guest Editor
Biophysics and Medical Technology, Department of Physics, NTNU The Norwegian University of Science and Technology, NO-7491 Trondheim, Norway
Interests: biopolymers; biopolymer mesoscale structure formation (PEC, multilayers, hydrogels, and fibrills); microfluidics assisted soft materials assembly; hydrogel structure; bioresponsive hydrogels; biosensors; biopolymers at the single molecule level
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Guest Editor
Laboratoire Hubert Curien, Institut d Optique Graduate School, Université Jean Monnet Saint-Etienne, UMR CNRS 5516, F-42023 Saint-Étienne, France
Interests: calixarenes; metal nanoparticles; thin film deposition; organic synthesis; sol-gel synthesis; host guest chemistry; nanomaterials synthesis

Special Issue Information

Dear Colleagues,

Polymeric gels, including organogels, hydrogels, ionic gels, or sol-gel materials, are versatile materials that have received significant attention in recent years. Their use in sensing applications is a growing field, with impacts on environmental monitoring, healthcare, food safety, and industrial quality control. Their inherent flexibility, sensitivity to external stimuli, and ease of functionalization make them ideal for such applications. This dynamic nature allows polymeric gels to respond to various stimuli, such as temperature, pH, light, or chemical analytes, making them ideal candidates for next-generation sensors.

We encourage you to submit your work for the forthcoming Special Issue, "Polymer Gels for Sensor Applications". This Special Issue will bring together recent advances in the development and application of polymeric gels for environmental, healthcare, and food sensing and monitoring applications. Contributions showcasing theoretical studies and practical implementations are welcome. A multidisciplinary effort helps the progress of the field, and it is anticipated that the subjects in this Special Issue may spark new discoveries in the field of sensing.

The scope of this Special Issue includes, but is not limited to, the following:

  1. Design, synthesis, and characterization of polymer gels for sensing.
  2. Smart hydrogels and organogels for optical or electrochemical sensing.
  3. Sol-gel materials for sensing applications.
  4. Integration of polymer gels with devices for real-time sensing applications.
  5. Biodegradable and sustainable polymer gels for sensing technologies.
  6. Functionalization methodologies for enhancing sensitivity and specificity of polymer gels.

Dr. Rui P. C. L. Sousa
Prof. Dr. Bjørn Torger Stokke
Prof. Dr. Francis Vocanson
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 2100 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

  • polymer gels
  • sensing
  • monitoring
  • smart materials
  • functional gels
  • environmental sensors
  • optical sensors
  • electrochemical sensors
  • hydrogel sensors
  • sol-gel sensors

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Published Papers (1 paper)

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Research

21 pages, 2662 KiB  
Article
Study of Printable and Biocompatible Alginate–Carbon Hydrogels for Sensor Applications: Mechanical, Electrical, and Cytotoxicity Evaluation
by Laura Mendoza-Cerezo, Jesús M. Rodríguez-Rego, A. Macias-García, Francisco de Asís Iñesta-Vaquera and Alfonso C. Marcos-Romero
Gels 2025, 11(6), 389; https://doi.org/10.3390/gels11060389 - 26 May 2025
Viewed by 315
Abstract
The development of printable, conductive, and biocompatible hydrogels has emerged as a promising strategy for the next generation of flexible and soft sensor platforms. In this study, we present a systematic investigation of alginate-based hydrogels incorporating different carbonaceous materials, natural graphite, carbon black [...] Read more.
The development of printable, conductive, and biocompatible hydrogels has emerged as a promising strategy for the next generation of flexible and soft sensor platforms. In this study, we present a systematic investigation of alginate-based hydrogels incorporating different carbonaceous materials, natural graphite, carbon black (Vulcan V3), and activated carbon (PCO1000C), to evaluate their suitability for sensor applications. Hydrogels were formulated with varying concentrations of sodium alginate and a fixed loading of carbon additives. Each composite was characterized in terms of electrical conductivity under compression, rheological behavior, and mechanical strength. Printability was assessed using a custom-designed extrusion platform that allowed for the precise determination of the minimum force and optimal conditions required to extrude each formulation through a standard 20G nozzle. Among all tested systems, the alginate–graphite hydrogel demonstrated superior extrudability, shear-thinning behavior, and shape fidelity, making it well-suited for 3D printing or direct ink writing. A simple conductivity-testing device was developed to verify the electrical response of each hydrogel in the hydrated state. The effects of different drying methods on the final conductivity were also analyzed, showing that oven drying at 50 °C yielded the highest restoration of conductive pathways. Mechanical tests on printed structures confirmed their ability to maintain shape and resist compressive forces. Finally, the biocompatibility of the printed alginate–graphite hydrogel was validated using a standard cytotoxicity assay. The results demonstrated high cell viability, confirming the material’s potential for use in biomedical sensing environments. This work offers a robust framework for the development of sustainable, printable, and biocompatible conductive hydrogels. The combined performance in printability, mechanical integrity, electrical conductivity, and cytocompatibility highlights their promise for flexible biosensors and wearable sensor technologies. Full article
(This article belongs to the Special Issue Polymer Gels for Sensor Applications)
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