Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
3.9
4.2
Journals
Chemosensors
Special Issues
Feature Papers- Electrochemical Devices and Sensors
share announcement

Feature Papers- Electrochemical Devices and Sensors

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 2020) | Viewed by 14227

Special Issue Editor

Prof. Dr. Nicole Jaffrezic-Renault

E-Mail Website
Guest Editor
Institute of Analytical Sciences, UMR CNRS 5280, Department LSA, 5 Rue de La Doua, 69100 Villeurbanne, France
Interests: biosensors; impedance; immunosensors; conductometric sensors; enzymatic sensors; affinity sensors
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear colleagues,

“Electrochemical Devices and Sensors’’ section is devoted to electrochemical transduction for chemical sensing, including new designs; new electrode materials; new fabrication processes; new concepts for amplified electrochemical detection; new concepts for selective electrochemical detection; lab-on-chips; micro total analysis systems; microarray systems based on electrochemical transduction; and in situ validation of electrochemical devices and sensors in the environment, in biomedicine, and in foodstuffs.

In order to celebrate the journal has been accepted for inclusion in the Science Citation Index Expanded (SCIE) in the Web of Science Core Collection and will receive its 2019 journal metrics in the June 2020 release of the Journal Citation Reports (Clarivate Analytics), we are launching this Special Issue to publish top-quality papers from editorial board members and leading researchers. All papers will be published in open access and without any charges.

If you are interested in publishing your work in the Special Issue, please contact me or the editorial office.

Prof. Dr. Nicole Jaffrezic-Renault
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.

Published Papers (4 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

Jump to: Review

13 pages, 3157 KiB  
Article
Capacitance Electrochemical pH Sensor Based on Different Hafnium Dioxide (HfO2) Thicknesses
by Zina Fredj, Abdoullatif Baraket, Mounir Ben Ali, Nadia Zine, Miguel Zabala, Joan Bausells, Abdelhamid Elaissari, Nsikak U. Benson, Nicole Jaffrezic-Renault and Abdelhamid Errachid
Chemosensors 2021, 9(1), 13; https://doi.org/10.3390/chemosensors9010013 - 10 Jan 2021
Cited by 18 | Viewed by 3498
Abstract
Over the past years, to achieve better sensing performance, hafnium dioxide (HfO2) has been studied as an ion-sensitive layer. In this work, thin layers of hafnium dioxide (HfO2) were used as pH-sensitive membranes and were deposited by atomic layer [...] Read more.
Over the past years, to achieve better sensing performance, hafnium dioxide (HfO2) has been studied as an ion-sensitive layer. In this work, thin layers of hafnium dioxide (HfO2) were used as pH-sensitive membranes and were deposited by atomic layer deposition (ALD) process onto an electrolytic-insulating-semiconductor structure Al/Si/SiO2/HfO2 for the realization of a pH sensor. The thicknesses of the layer of the HfO2 studied in this work was 15, 19.5 and 39.9 nm. HfO2 thickness was controlled by ALD during the fabrication process. The sensitivity toward H+ was clearly higher when compared to other interfering ions such as potassium K+, lithium Li+, and sodium Na+ ions. Mott−Schottky and electrochemical impedance spectroscopy (EIS) analyses were used to characterise and to investigate the pH sensitivity. This was recorded by Mott–Schottky at 54.5, 51.1 and 49.2 mV/pH and by EIS at 5.86 p[H−1], 10.63 p[H−1], 12.72 p[H−1] for 15, 19.5 and 30 nm thickness of HfO2 ions sensitive layer, respectively. The developed pH sensor was highly sensitive and selective for H+ ions for the three thicknesses, 15, 19.5 and 39.9 nm, of HfO2-sensitive layer when compared to the other previously mentioned interferences. However, the pH sensor performances were better with 15 nm HfO2 thickness for the Mott–Schottky technique, whilst for EIS analyses, the pH sensors were more sensitive at 39.9 nm HfO2 thickness. Full article
(This article belongs to the Special Issue Feature Papers- Electrochemical Devices and Sensors)
►▼ Show Figures

Figure 1

26 pages, 873 KiB  
Article
Potentiometric Carboxylate Sensors Based on Carbazole-Derived Acyclic and Macrocyclic Ionophores
by Ville Yrjänä, Indrek Saar, Mihkel Ilisson, Sandip A. Kadam, Ivo Leito and Johan Bobacka
Chemosensors 2021, 9(1), 4; https://doi.org/10.3390/chemosensors9010004 - 24 Dec 2020
Cited by 8 | Viewed by 3496
Abstract
Solid-contact ion-selective electrodes with carbazole-derived ionophores were prepared. They were characterized as acetate sensors, but can be used to determine a number of carboxylates. The potentiometric response characteristics (slope, detection limit, selectivity, and pH sensitivity) of sensors prepared with different membrane compositions (ionophore, [...] Read more.
Solid-contact ion-selective electrodes with carbazole-derived ionophores were prepared. They were characterized as acetate sensors, but can be used to determine a number of carboxylates. The potentiometric response characteristics (slope, detection limit, selectivity, and pH sensitivity) of sensors prepared with different membrane compositions (ionophore, ionophore concentration, anion exchanger concentration, and plasticizer) were evaluated. The results show that for the macrocyclic ionophores, a larger cavity provided better selectivity. The sensors exhibited modest selectivity for acetate but good selectivity for benzoate. The carbazole-derived ionophores effectively decreased the interference from lipophilic anions, such as bromide, nitrate, iodide, and thiocyanate. The selectivity, detection limit, and linear range were improved by choosing a suitable plasticizer and by reducing the ionophore and anion exchanger concentrations. The influence of the electrode body’s material upon the composition of the plasticized poly(vinyl chloride) membrane, and thus also upon the sensor characteristics, was also studied. The choice of materials for the electrode body significantly affected the characteristics of the sensors. Full article
(This article belongs to the Special Issue Feature Papers- Electrochemical Devices and Sensors)
►▼ Show Figures

Figure 1

14 pages, 2697 KiB  
Article
Electrochemical Evaluation of Laccase Activity in Must
by Szilveszter Gáspár, Elena Brinduse and Alina Vasilescu
Chemosensors 2020, 8(4), 126; https://doi.org/10.3390/chemosensors8040126 - 07 Dec 2020
Cited by 6 | Viewed by 2616
Abstract
As laccase (produced by Botrytis cinerea) can significantly alter the properties of wine, winemakers frequently use commercially available colorimetric kits and spectrophotometers to measure the activity of this enzyme in grapes, must and wine. Although the used kits are based on electrochemically [...] Read more.
As laccase (produced by Botrytis cinerea) can significantly alter the properties of wine, winemakers frequently use commercially available colorimetric kits and spectrophotometers to measure the activity of this enzyme in grapes, must and wine. Although the used kits are based on electrochemically active substrates (such as syringaldazine and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid), ABTS), the electrochemical determination of laccase activity as an alternative to the colorimetric determination was not thoroughly investigated up to now. Therefore, in the present work, we explored the electrochemical determination of laccase activity. Laccase activity measurements were carried out using either carbon fiber microelectrodes or screen-printed electrodes as working electrodes, either syringaldazine or ABTS as the electrochemically active laccase substrate, and either cyclic voltammetry or constant potential amperometry as the electrochemical method. The best performing approach, which combines ABTS, screen-printed gold electrodes, and constant potential amperometry, allowed identifying laccase positive must sample (i.e., must samples with › 3U/mL laccase) in about 5 min. Full article
(This article belongs to the Special Issue Feature Papers- Electrochemical Devices and Sensors)
►▼ Show Figures

Figure 1

Review

Jump to: Research

15 pages, 300 KiB  
Review
How to Improve the Performance of Electrochemical Sensors via Minimization of Electrode Passivation
by Jiri Barek
Chemosensors 2021, 9(1), 12; https://doi.org/10.3390/chemosensors9010012 - 06 Jan 2021
Cited by 30 | Viewed by 4046
Abstract
It follows from critical evaluation of possibilities and limitations of modern voltammetric/amperometric methods that one of the biggest obstacles in their practical applications in real sample analysis is connected with electrode passivation/fouling by electrode reaction products and/or matrix components. This review summarizes possibilities [...] Read more.
It follows from critical evaluation of possibilities and limitations of modern voltammetric/amperometric methods that one of the biggest obstacles in their practical applications in real sample analysis is connected with electrode passivation/fouling by electrode reaction products and/or matrix components. This review summarizes possibilities how to minimise these problems in the field of detection of small organic molecules and critically compares their potential and acceptability in practical laboratories. Attention is focused on simple and fast electrode surface renewal, the use of disposable electrodes just for one and/or few measurements, surface modification minimising electrode fouling, measuring in flowing systems, application of rotating disc electrode, the use of novel separation methods preventing access of passivating particles to electrode surface and the novel electrode materials more resistant toward passivation. An attempt is made to predict further development in this field and to stress the need for more systematic and less random research resulting in new measuring protocols less amenable to complications connected with electrode passivation. Full article
(This article belongs to the Special Issue Feature Papers- Electrochemical Devices and Sensors)
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-4
Back to TopTop