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Chemosensors
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Advances in Electrochemical Sensing and Analysis
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Advances in Electrochemical Sensing and Analysis

A special issue of Chemosensors (ISSN 2227-9040). This special issue belongs to the section "Electrochemical Devices and Sensors".

Deadline for manuscript submissions: closed (31 December 2024) | Viewed by 6471

Special Issue Editor

Dr. Gabriela Broncová

E-Mail Website
Guest Editor
Department of Analytical Chemistry, University of Chemistry and Technology in Prague (UCT Prague), Technická 5, 166 28 Prague, Czech Republic
Interests: preparation and characterization of electropolymerized layers; modification of polymerized layers; electroanalytical techniques (potentiometry, CV, EIS); electrochemical sensors
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We would like to invite you to submit your contribution to the Special Issue on “Advanced in Electrochemical Sensing and Analysis” in Chemosensors.

This Special Issue is dedicated to exploring recent advances and existing challenges in the field of electrochemical sensing and analysis. Electrochemical sensing and analysis have a wide range of applications, and innovations in this field are of great value in food quality monitoring, health diagnostics, environment, chemical process control, and forensic analysis. However, the rapid development in the field of electrochemistry relies on the sensitivity, selectivity, and stability of electrochemical sensing or analysis systems. Challenges in this area may be new sensitive materials, surface treatments, innovative processes, etc., and the innovations in these aspects will improve the parameters of existing sensors or new sensor systems.

The Special Issue will cover, but is not limited to, the following topics:

  • Advances in electrochemical detection (potentiometry, amperometry, voltammetry, electrochemical impedance spectroscopy);
  • Novel concepts’ electrochemical sensors;
  • Preparation, modification, and characterization of advanced electrodes;
  • Molecular recognition with electrochemical detection;
  • Trends in analytical electrochemistry;
  • Electrochemical sensors and sensor-array chemometrics;
  • Applied analytical electrochemistry.

The aim of this Special Issue is to identify recent advances and novel trends that lead to improvement of the characteristics of electrochemical sensors critical for their application. Studies concerning the electrochemical detection of multiple applications will be presented. This Special Issue opens the possibility for contributions from the researcher community including the younger generation working in the field of electrochemical detection.

On behalf of the Guest Editor and the Editor-in Chief, we encourage you to submit your work to this Special Issue.

Dr. Gabriela Broncová
Guest Editor

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. Chemosensors 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 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

  • electropolymerized layers
  • screen-printed electrode
  • modification of surfaces
  • electroanalytical techniques
  • electrochemical detection
  • electrochemical sensors

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Further information on MDPI's Special Issue polices can be found here.

Published Papers (4 papers)

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Research

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20 pages, 5259 KiB  
Article
Voltammetric Sensor Based on Titania Nanoparticles Synthesized with Aloe vera Extract for the Quantification of Dithiophosphates in Industrial and Environmental Samples
by Javier E. Vilasó-Cadre, Alondra Ramírez-Rodríguez, Juan Hidalgo, Iván A. Reyes-Domínguez, Roel Cruz, Mizraim U. Flores, Israel Rodríguez-Torres, Roberto Briones-Gallardo, Luis Hidalgo and Juan Jesús Piña Leyte-Vidal
Chemosensors 2024, 12(9), 195; https://doi.org/10.3390/chemosensors12090195 - 22 Sep 2024
Viewed by 1484
Abstract
In this work, TiO2 spherical nanoparticles with a mean diameter of 10.08 nm (SD = 4.54 nm) were synthesized using Aloe vera extract. Rutile, brookite, and anatase crystalline phases were identified. The surface morphology of a carbon paste electrode does not change [...] Read more.
In this work, TiO2 spherical nanoparticles with a mean diameter of 10.08 nm (SD = 4.54 nm) were synthesized using Aloe vera extract. Rutile, brookite, and anatase crystalline phases were identified. The surface morphology of a carbon paste electrode does not change in the presence of nanoparticles; however, the surface chemical composition does. The voltammetric response to dicresyl dithiophosphate was higher when the electrode was modified with TiO2 nanoparticles. After an electrochemical response study from pH 1.0 to 12.0, pH 7.0 was selected for the electroanalysis. The electroactive area of the modified sensor was 0.036 cm2, while it was 0.026 cm2 for the bare electrode. The oxidation process showed mixed adsorption-diffusion control. The charge transfer resistance of the modified sensor (530.1 Ω, SD = 4.08 Ω) was much lower than that of the bare electrode (4298 Ω, SD = 8.53 Ω). The linear quantitative range by square wave voltammetry was from 5 to 150 μmol/L, with a limit of detection of 1.89 μmol/L and a limit of quantification of 6.26 μmol/L under optimal pulse parameters of 50 Hz frequency, 1 mV step potential, and 25 mV pulse amplitude. The sensor response was repeatable and reproducible over 30 days. The results on real flotation and synthetically contaminated soil samples were statistically equivalent to those obtained by UV-vis spectrophotometry. A dithiocarbamate showed an interfering effect on the sensor response to dithiophosphate. Full article
(This article belongs to the Special Issue Advances in Electrochemical Sensing and Analysis)
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12 pages, 3439 KiB  
Article
Interaction of the Polymeric Layer Derived from 3-(4-Trifluoromethyl)-phenyl)-thiophene with Synthetic Stimulants on the Phase Boundary
by Tatiana V. Shishkanova, Natalie Štěpánková, Gabriela Broncová and Martin Vrňata
Chemosensors 2024, 12(6), 99; https://doi.org/10.3390/chemosensors12060099 - 5 Jun 2024
Cited by 1 | Viewed by 1149
Abstract
Modification of an electrode surface with a selective layer leads to amplification of the electrochemical signal. A film derived from electrochemically oxidized 3-(4-trifluoromethyl)-phenyl)-thiophene deposited on a graphite electrode (ThPhCF3/G) was used to estimate the affinity for synthetic stimulants (2-aminoindane, buphedrone, naphyrone) [...] Read more.
Modification of an electrode surface with a selective layer leads to amplification of the electrochemical signal. A film derived from electrochemically oxidized 3-(4-trifluoromethyl)-phenyl)-thiophene deposited on a graphite electrode (ThPhCF3/G) was used to estimate the affinity for synthetic stimulants (2-aminoindane, buphedrone, naphyrone) using a combination of square wave voltammetry and electrochemical impedance spectroscopy. The modified surface was characterized using Raman spectroscopy, which confirmed that the presence of the –PhCF3 group is important for the recognition of synthetic stimulants. The determined values of the adsorption constants (Kads) showed the significance of charge–transfer and/or hydrogen bond interactions between—PhCF3 groups in the polymeric film and the analyte of interest: buphedrone (9.79 × 105) < naphyrone (1.57 × 106) < 2-AI (1.87 × 106). Compared to electrodes modified with nanomaterial, PThPhCF3/G-electrodes showed the highest sensitivity in concentration range of 1–11 μmol L−1 at neutral pH and a possibility of detection of 0.43–0.56 μg mL−1 (sr = 0.05–0.12). The analytical performance of ThPhCF3/G promises good perspectives for the detection of synthetic stimulants in forensic samples without prior pretreatment. Full article
(This article belongs to the Special Issue Advances in Electrochemical Sensing and Analysis)
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14 pages, 5459 KiB  
Communication
Improved Microelectrode Array Electrode Design for Heavy Metal Detection
by Jian Zhang, Shijun Wu, Feng Zhang, Bo Jin and Canjun Yang
Chemosensors 2024, 12(4), 51; https://doi.org/10.3390/chemosensors12040051 - 28 Mar 2024
Cited by 2 | Viewed by 1616
Abstract
Traditional working electrodes are not sufficient to realize the low detection limit and wide detection range necessary for the detection of heavy metals. In this study, a microelectrode array electrode was proposed using a design scheme based on microelectromechanical systems that was optimized [...] Read more.
Traditional working electrodes are not sufficient to realize the low detection limit and wide detection range necessary for the detection of heavy metals. In this study, a microelectrode array electrode was proposed using a design scheme based on microelectromechanical systems that was optimized with finite element software. The working electrode adopted an innovative composite structure to realize the integrated design of the working and counter electrodes, which improved the system integration. Performance tests showed that the electrode realized the quantitative analysis of Cd(II), Pb(II), and Cu(II) with a low detection limit (0.1 μg/L) and a wide detection range (0.1–3000 μg/L). The electrode successfully measured the lead and copper ion concentrations in the Sanya River, including both seawater and freshwater environments. The experimental results demonstrate that the electrode exhibits excellent adaptability to environmental conditions and can be potentially applied for technical support in environmental monitoring and sewage treatment. Full article
(This article belongs to the Special Issue Advances in Electrochemical Sensing and Analysis)
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Review

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23 pages, 7345 KiB  
Review
Review of Underwater In Situ Voltammetry Analyzers for Trace Metals
by Jian Zhang, Shijun Wu, Ziying Wu, Feng Zhang, Bo Jin and Canjun Yang
Chemosensors 2024, 12(8), 158; https://doi.org/10.3390/chemosensors12080158 - 8 Aug 2024
Viewed by 1609
Abstract
This review is a comprehensive overview of recent advancements in underwater in situ heavy metal voltammetric analyzers (UIHVAs). It explores various types of in situ voltammetric analyzers, including the voltammetric in situ profiling system, submersible integrated multi-channel trace metal sensing probes, vibrating gold [...] Read more.
This review is a comprehensive overview of recent advancements in underwater in situ heavy metal voltammetric analyzers (UIHVAs). It explores various types of in situ voltammetric analyzers, including the voltammetric in situ profiling system, submersible integrated multi-channel trace metal sensing probes, vibrating gold microwire electrode voltammetric analyzers, and electrochemical analyzers designed for on-site flow measurements. It also covers electrochemical sensors based on flexible liquid crystal polymers, deep-sea mercury sensors, and other in situ electrochemical analyzers. This review systematically examines the research and development progress of microelectrode arrays, screen-printed, carbon, bismuth, antimony, and lab-on-a-chip electrodes. The final section looks at key trends in the research and development of voltammetric analyzers, highlighting the exploration of novel working electrodes, the integration of smart monitoring and data analysis technologies, and the promotion of interdisciplinary collaboration and innovation. From a global perspective, in situ heavy metal voltammetric analysis technology has demonstrated significant applicability in various fields, such as environmental monitoring, marine science, and biogeochemistry. This technology holds considerable potential for further development. However, extensive research and continuous improvement are required to improve detection performance. We are convinced that with continued technological advances and dedicated research efforts, these challenges can be overcome and will pave the way for the widespread application of UIHVAs. Full article
(This article belongs to the Special Issue Advances in Electrochemical Sensing and Analysis)
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