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Polymers
Special Issues
Polymer-Based Colorimetric and Electrochemical Sensors for Practical Applications
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Polymer-Based Colorimetric and Electrochemical Sensors for Practical Applications

A special issue of Polymers (ISSN 2073-4360). This special issue belongs to the section "Polymer Applications".

Deadline for manuscript submissions: closed (25 March 2024) | Viewed by 3648

Special Issue Editors

Dr. Lisa Rita Magnaghi

E-Mail Website
Guest Editor
Department of Chemistry, University of Pavia, 27100 Pavia, PV, Italy
Interests: colorimetric sensors; pH-sensitive sensors; volatile molecules detection; polymeric sensors; chemometrics; food freshness monitoring; metal ion sensing
Special Issues, Collections and Topics in MDPI journals
Dr. Raffaela Biesuz

E-Mail Website
Guest Editor
Department of Chemistry, University of Pavia, 27100 Pavia, PV, Italy
Interests: optical sensor; tailored devices; smart labels
Dr. Giancarla Alberti

E-Mail Website
Guest Editor
Department of Chemistry, University of Pavia, Via Taramelli 12, 27100 Pavia, PV, Italy
Interests: molecularly imprinted polymers; solid sorbents; colorimetric sensors; ion and chelating resins; electroanalytical techniques; metal ions complexes
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Polymeric materials and sensing devices undoubtedly represent two of the hottest research topics in recent years; among all the fields of application, polymer-based sensors represent the best candidate for devices aiming at a practical application in real life, such as on-line monitoring, real-time detection or, more generally, scalable, low-cost and disposable devices. The pros of polymer-based devices are usually coupled with colorimetric and electrochemical detection, since these techniques do not require expensive and bulky instruments, trained staff or sample destruction, while ensuring reliable and easy-to-interpret results. An additional improvement is generally achieved by applying chemometric techniques for devices’ development (design of experiments) and data analysis (multivariate techniques), especially in the case of complex real samples.

In light of the above, this Special Issue aims to collect the latest ground-breaking developments in the field of polymer-based colorimetric and electrochemical sensors, with a focus on practical applications or dealing with/solving real-life problems, however silly or unimportant they may sound

Dr. Lisa Rita Magnaghi
Dr. Raffaela Biesuz
Dr. Giancarla Alberti
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. Polymers is an international peer-reviewed open access semimonthly 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 2700 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

  • polymers
  • polymer-based sensors
  • colorimetric sensors
  • electrochemical sensors
  • scalability
  • real-life applicability
  • chemometrics

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Published Papers (2 papers)

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Research

11 pages, 5178 KiB  
Article
Platinum Black/Gold Nanoparticles/Polyaniline Modified Electrochemical Microneedle Sensors for Continuous In Vivo Monitoring of pH Value
by Tao Ming, Tingting Lan, Mingxing Yu, Hong Wang, Juan Deng, Deling Kong, Shuang Yang and Zhongyang Shen
Polymers 2023, 15(13), 2796; https://doi.org/10.3390/polym15132796 - 23 Jun 2023
Cited by 8 | Viewed by 1684
Abstract
Continuous in vivo monitoring (CIVM) of pH value is essential for personalized medicine, as many diseases are closely related to acid–base imbalances. However, conventional pH meters are limited in their ability to perform CIVM due to excessive blood consumption, large device volume, frequent [...] Read more.
Continuous in vivo monitoring (CIVM) of pH value is essential for personalized medicine, as many diseases are closely related to acid–base imbalances. However, conventional pH meters are limited in their ability to perform CIVM due to excessive blood consumption, large device volume, frequent calibration, and inadequate real-time monitoring. There is thus an urgent need for a portable method for CIVM of pH value. To address this need, we propose a minimally invasive, continuous monitoring solution in the form of an implantable pH microneedle sensor (MNS) in this study. The MNS is based on the integration of an acupuncture needle (AN) and a Ag/AgCl reference electrode. We fabricate the sensor by electrochemically depositing platinum black and gold nanoparticles onto the AN and further modifying it with polyaniline to increase its sensitivity to hydrogen ions. The pH value is obtained by calculating the open circuit voltage between the modified AN and the reference electrode. The resulting MNS demonstrates excellent selectivity and a high nernstian response to pH (−57.4 mV per pH) over a broad range (pH = 4.0 to pH = 9.0). Both in vitro and in vivo experiments have verified the performance of the sensor, showcasing its potential for biomedical research and clinical practice. The MNS provides an alternative to conventional pH meters, offering a less invasive and more convenient way to perform CIVM of pH value. Moreover, this electrochemical implantable sensor based on AN and silver wires provides a simple and sensitive method for continuous in vivo detection of other biomarkers. Full article
(This article belongs to the Special Issue Polymer-Based Colorimetric and Electrochemical Sensors for Practical Applications)
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19 pages, 2745 KiB  
Article
Potentiometric Sensor Arrays Based on Hybrid PFSA/CNTs Membranes for the Analysis of UV-Degraded Drugs
by Anna Parshina, Anastasia Yelnikova, Ekaterina Safronova, Tatyana Kolganova, Olga Bobreshova and Andrey Yaroslavtsev
Polymers 2023, 15(12), 2682; https://doi.org/10.3390/polym15122682 - 14 Jun 2023
Cited by 4 | Viewed by 1318
Abstract
The degradation of drugs is a substantial problem since it affects the safety and effectiveness of pharmaceutical products, as well as their influence on the environment. A novel system of three potentiometric cross-sensitive sensors (using the Donnan potential (DP) as an analytical signal) [...] Read more.
The degradation of drugs is a substantial problem since it affects the safety and effectiveness of pharmaceutical products, as well as their influence on the environment. A novel system of three potentiometric cross-sensitive sensors (using the Donnan potential (DP) as an analytical signal) and a reference electrode was developed for the analysis of UV-degraded sulfacetamide drugs. The membranes for DP-sensors were prepared by a casting procedure from a dispersion of perfluorosulfonic acid (PFSA) polymer, containing carbon nanotubes (CNTs), whose surface was preliminarily modified with carboxyl, sulfonic acid, or (3-aminopropyl)trimethoxysilanol groups. A correlation between the sorption and transport properties of the hybrid membranes and cross-sensitivity of the DP-sensor to sulfacetamide, its degradation product, and inorganic ions was revealed. The analysis of the UV-degraded sulfacetamide drugs using the multisensory system based on hybrid membranes with optimized properties did not require a pre-separation of the components. The limits of detection of sulfacetamide, sulfanilamide, and sodium were 1.8 × 10−7, 5.8 × 10−7, and 1.8 × 10−7 M. The relative errors of the determination of the components of the UV-degraded sulfacetamide drugs were 2–3% (at 6–8% relative standard deviation). PFSA/CNT hybrid materials provided the stable work of the sensors for at least one year. Full article
(This article belongs to the Special Issue Polymer-Based Colorimetric and Electrochemical Sensors for Practical Applications)
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