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Chemosensors
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Electrochemical Sensors and Microelectronic Devices for Ionic Analytes
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Electrochemical Sensors and Microelectronic Devices for Ionic Analytes

A special issue of Chemosensors (ISSN 2227-9040). This special issue belongs to the section "Applied Chemical Sensors".

Deadline for manuscript submissions: closed (30 August 2022) | Viewed by 14761

Special Issue Editors

Dr. Hnin Nyein

E-Mail Website
Guest Editor
Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA 94720, USA
Interests: Bioelectronics; Electrochemistry; Precision medicine
Dr. Li-Chia Jerry Tai

E-Mail Website
Guest Editor
Department of Electrical Engineering and Computer Sciences, University of California, Berkeley, CA 94720, USA
Interests: wearable devices; flexible electronics; personalized medicine; electrochemical sensors; drug dosage optimization

Special Issue Information

Dear Colleagues,

Electrochemical sensors targeting ionic and polyionic analytes have become increasingly important due to their potentially wide applications in biomedicine and environmental monitoring. In recent years, much effort has been made to further expand the library of available electrochemical sensors and target new applications.

This Special Issue welcomes novel perspectives and discoveries in the field of electrochemical devices for ionic analytes, demonstrating new sensing capabilities or presenting interesting applications. Both review articles and original research papers will be considered in but not limited to the following areas:

  • Novel electrochemical sensors for ionic and polyionic analytes;
  • Enabling technologies based on electrochemical devices;
  • Sensor networks and their transformative applications;
  • New materials for bio-related electrochemical sensors;
  • Applications of electrochemical sensors in environment monitoring;
  • Digital health and clinical studies targeting ionic analytes.

Dr. Hnin Nyein
Dr. Li-Chia Jerry Tai
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. 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

  • Electrochemical devices
  • Internet of Things
  • Sensor network
  • Digital health

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

Published Papers (4 papers)

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Research

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20 pages, 5786 KiB  
Article
Prospects of Application of Ultramicroelectrode Ensembles for Voltammetric Determination of Compounds with Close Standard Electrode Potentials and Different Diffusion Coefficients
by Andrey Yu. Arbenin, Alexey A. Petrov, Denis V. Nazarov, Evgeny Serebryakov, Sergey O. Kirichenko, Petr S. Vlasov, Elena G. Zemtsova, Vladimir M. Smirnov, Elena E. Danilova, Sergey S. Ermakov, Alexander Vorobyov, Mikhail S. Mukhin and Alexey M. Mozharov
Chemosensors 2022, 10(10), 433; https://doi.org/10.3390/chemosensors10100433 - 19 Oct 2022
Cited by 2 | Viewed by 2360
Abstract
The spherical diffusion that occurs when using ultramicroelectrodes (i.e., electrodes with a characteristic size of 1–10 µm) contributes to a higher mass transfer rate. This leads to equalization of the depletion rates of the near-electrode layer due to the electrochemical reaction and to [...] Read more.
The spherical diffusion that occurs when using ultramicroelectrodes (i.e., electrodes with a characteristic size of 1–10 µm) contributes to a higher mass transfer rate. This leads to equalization of the depletion rates of the near-electrode layer due to the electrochemical reaction and to the supply of the product from the solution depth. This is the reason why, for ultramicroelectrodes, a limiting size of the spherical layer exists in which the concentration gradient is localized (diffusion layer). Thus, a stationary mass transfer mode is achieved, which is expressed in the sigmoidal CV curve’s shape. In ultramicroelectrode arrays, when the diffusion hemispheres are separated, a steady-state diffusion is realized. However, with a decrease in the interelectrode distance, which leads to the diffusion spheres intersection, a mixed regime arises, which is not fully time-independent. The resulting voltammogram’s shape change can serve as an analytical signal in the study of substances with differing diffusion coefficients, since the diffusion layer growth rate and, consequently, the area of intersection of neighboring spheres, depends on it. This work shows the applicability of voltammetry using ensembles of ultramicroelectrodes operating in the transient mode for the analysis of mixtures of electrochemically active compounds with close electrode reaction parameters, such as exchange currents and electrode potential. Ferrocenemethanol esters are used as an example. The applicability of cyclic voltammetry on the UME array for analysis of mixtures was illustrated by means of finite element modelling. The reliability of the modelling results was experimentally proved for ferrocenemethanol esters with glycine and triglycine. Full article
(This article belongs to the Special Issue Electrochemical Sensors and Microelectronic Devices for Ionic Analytes)
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13 pages, 3937 KiB  
Article
Development of On-Site Rapid Detection Device for Soil Macronutrients Based on Capillary Electrophoresis and Capacitively Coupled Contactless Conductivity Detection (C4D) Method
by Junqing Zhang, Rujing Wang, Zhou Jin, Hongyan Guo, Yi Liu, Yongjia Chang, Jiangning Chen, Mengya Li and Xiangyu Chen
Chemosensors 2022, 10(2), 84; https://doi.org/10.3390/chemosensors10020084 - 15 Feb 2022
Cited by 12 | Viewed by 4070
Abstract
The acquisition of nutrient data on a precise scale has played a vital role in nutrient management processes for soils. However, the lack of rapid precise and multi-index detection techniques for soil macronutrient contents hinders both rational fertilization and cost reduction. In this [...] Read more.
The acquisition of nutrient data on a precise scale has played a vital role in nutrient management processes for soils. However, the lack of rapid precise and multi-index detection techniques for soil macronutrient contents hinders both rational fertilization and cost reduction. In this paper, a rapid detection method and device were devised, combining capillary electrophoresis (CE) and capacitively coupled contactless conductivity detection (C4D), and presented to detect macronutrient contents of soil. The device consisted of a capillary channel, C4D detector, high-voltage system, etc. It separated macronutrient ions using capillary electrophoresis and then measured the ion concentration based on the C4D principle. Lime concretion black soil samples from a complete field were collected and detected. NO3−, NH4+, H2PO4− and K+ in sample solutions could be detected in 5 min with relative standard deviations (RSDs) from 1.0 to 7.51%. The injection voltage was set to 10 kV for 5 s, and the separation voltage was set to 14 kV. This demonstrated the excellent performance of the C4D device on the detection of soil macronutrients, which could help to guide fertilization operations more effectively. Full article
(This article belongs to the Special Issue Electrochemical Sensors and Microelectronic Devices for Ionic Analytes)
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Review

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23 pages, 3385 KiB  
Review
Electrochemical Devices to Monitor Ionic Analytes for Healthcare and Industrial Applications
by Sue-Yuan Fan, Sucharita Khuntia, Christine Heera Ahn, Bing Zhang and Li-Chia Tai
Chemosensors 2022, 10(1), 22; https://doi.org/10.3390/chemosensors10010022 - 6 Jan 2022
Cited by 8 | Viewed by 4200
Abstract
Recent advances in electrochemical devices have sparked exciting opportunities in the healthcare, environment, and food industries. These devices can be fabricated at low costs and are capable of multiplex monitoring. This overcomes challenges presnted in traditional sensors for biomolecules and provides us a [...] Read more.
Recent advances in electrochemical devices have sparked exciting opportunities in the healthcare, environment, and food industries. These devices can be fabricated at low costs and are capable of multiplex monitoring. This overcomes challenges presnted in traditional sensors for biomolecules and provides us a unique gateway toward comprehensive analyses. The advantages of electrochemical sensors are derived from their direct integration with electronics and their high selectivity along with sensitivity to sense a wide range of ionic analytes at an economical cost. This review paper aims to summarize recent innovations of a wide variety of electrochemical sensors for ionic analytes for health care and industrial applications. Many of these ionic analytes are important biomarkers to target for new diagnostic tools for medicine, food quality monitoring, and pollution detection. In this paper, we will examine various fabrication techniques, sensing mechanisms, and will also discuss various future opportunities in this research direction. Full article
(This article belongs to the Special Issue Electrochemical Sensors and Microelectronic Devices for Ionic Analytes)
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Other

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14 pages, 830 KiB  
Systematic Review
Biosensors for Detection and Monitoring of Joint Infections
by Umile Giuseppe Longo, Sergio De Salvatore, Alessandro Zompanti, Calogero Di Naro, Simone Grasso, Carlo Casciaro, Anna Sabatini, Alessandro Mazzola, Giorgio Pennazza, Marco Santonico and Vincenzo Denaro
Chemosensors 2021, 9(9), 256; https://doi.org/10.3390/chemosensors9090256 - 8 Sep 2021
Cited by 3 | Viewed by 2960
Abstract
The aim of this review is to assess the use of biosensors in the diagnosis and monitoring of joint infection (JI). JI is worldwide considered a significant cause of morbidity and mortality in developed countries. Due to the progressive ageing of the global [...] Read more.
The aim of this review is to assess the use of biosensors in the diagnosis and monitoring of joint infection (JI). JI is worldwide considered a significant cause of morbidity and mortality in developed countries. Due to the progressive ageing of the global population, the request for joint replacement increases, with a significant rise in the risk of periprosthetic joint infection (PJI). Nowadays, the diagnosis of JI is based on clinical and radiological findings. Nuclear imaging studies are an option but are not cost-effective. Serum inflammatory markers and the analysis of the aspirated synovial fluid are required to confirm the diagnosis. However, a quick and accurate diagnosis of JI may remain elusive as no rapid and highly accurate diagnostic method was validated. A comprehensive search on Medline, EMBASE, Scopus, CINAH, CENTRAL, Google Scholar, and Web of Science was conducted from the inception to June 2021. The PRISMA guidelines were used to improve the reporting of the review. The MINORS was used for quality assessment. From a total of 155 studies identified, only four articles were eligible for this study. The main advantages of biosensors reported were accuracy and capability to detect bacteria also in negative culture cases. Otherwise, due to the few studies and the low level of evidence of the papers included, it was impossible to find significant results. Therefore, further high-quality studies are required. Full article
(This article belongs to the Special Issue Electrochemical Sensors and Microelectronic Devices for Ionic Analytes)
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