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Special Issue "Smart Electrochemical Screen-Printed Platforms "

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Chemical Sensors".

Deadline for manuscript submissions: closed (31 December 2019).

Special Issue Editors

Prof. Dr. Edelmira Valero
Website
Guest Editor
Department of Physical Chemistry, University of Castilla-La Mancha, Albacete, Spain
Interests: electrochemical sensors and biosensors; screen-printed devices; modified electrodes; metal nanoparticles; enzymatic biosensors; electroanalysis; nanobiotechnology; electrochemistry in environmental and biological applications
Special Issues and Collections in MDPI journals
Prof. Dr. Jesús Iniesta
Website
Guest Editor
Department of Physical Chemistry, Institute of Electrochemistry, University of Alicante, Alicante, Spain
Interests: adsorption of proteins and bioelectrocatalysis; electrochemistry of carbonaceous materials; electrochemical sensors and biosensors; screen printed electrodes; electrochemistry of ionic liquids; nanoporous carbons in fuel cells; electrochemistry in environmental applications
Special Issues and Collections in MDPI journals

Special Issue Information

Dear Colleagues,

Screen-printing is a cutting-edge technology for the large-scale, low-cost fabrication of small disposable integrated electrochemical cells. Screen-printed electrodes have allowed the transition away from the large volume conventional electrochemical cells to the more modern analysis of microvolumes of samples, which has greatly contributed to major advances in electroanalysis. As a result of an intense research activity and technological progress made in recent decades, screen-printed electrodes are currently emerging as (bio)sensing portable tools for a plethora of analytical applications in areas as varied as environmental, biomedical, pharmaceutical, agri-food, and industrial, and even in the area of teaching. This is in large part due to the huge potentiality offered by conductive inks constituents of electrodes to be modified at convenience.

One of the major challenges to be resolved by researchers is the design and development of screen-printed electrodes-based sensors and biosensors that can manage point-of-care analysis of real samples, which involves complex sample matrices and wireless communications. For that reason, this Special Issue is intended to provide the most recent research results and emerging concepts in the challenging world of electrochemical (bio)sensors involving screen-printed technologies and portable devices. In essence, this Special Issue will keep the fundamentals of screen-printed electrodes in (bio)sensing, but it will also introduce cutting-edge topics such as wireless electrochemical (bio)sensors, as well as their wide number of applications. Therefore, topics of interest are: Electrochemical sensors and biosensors applications, screen-printed electrodes, wireless electronic (bio)sensors, point-of-care diagnostic devices, combination of mobile communications and electrochemical (bio)sensors, stability and selectivity in complex media, long-term stability without regular maintenance, and reduction of power consumption. New perspectives and challenges for future screen-printed electrodes can also be discussed. Research papers, short communications, and reviews are all welcome.

Prof. Dr. Edelmira Valero
Dr. Jesús Iniesta
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 papers will be 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. Sensors 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 2000 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 (bio)sensors applications 
  • Wireless communications and electrochemical (bio)sensing
  • Smartphone-based electroanalysis 
  • Communications and data processing 
  • Point-of-care (bio)sensing applications 
  • Real-time measurements 
  • Conductive inks 
  • Printed-circuit board technology 
  • Stability and selectivity in complex media 
  • Long-term stability
  • Reduction of power consumption

Published Papers (7 papers)

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Research

Open AccessArticle
Label-Free Impedimetric Immunosensors Modulated by Protein A/Bovine Serum Albumin Layer for Ultrasensitive Detection of Salbutamol
Sensors 2020, 20(3), 771; https://doi.org/10.3390/s20030771 - 31 Jan 2020
Abstract
The sensing properties of immunosensors are determined not only by the amount of immobilized antibodies but also by the number of effective antigen-binding sites of the immobilized antibody. Protein A (PA) exhibits a high degree of affinity with the Fc part of IgG [...] Read more.
The sensing properties of immunosensors are determined not only by the amount of immobilized antibodies but also by the number of effective antigen-binding sites of the immobilized antibody. Protein A (PA) exhibits a high degree of affinity with the Fc part of IgG antibody to feasibly produce oriented antibody immobilization. This work proposes a simple method to control the PA surface density on gold nanostructure (AuNS)-deposited screen-printed carbon electrodes (SPCEs) by mixing concentration-varied PA and bovine serum albumin (BSA), and to explore the effect of PA density on the affinity attachment of anti-salbutamol (SAL) antibodies by electrochemical impedance spectroscopy. A concentration of 100 μg/mL PA and 100 μg/mL BSA can obtain a saturated coverage on the 3-mercaptoproponic acid (MPA)/AuNS/SPCEs and exhibit a 50% PA density to adsorb the amount of anti-SAL, more than other concentration-varied PA/BSA-modified electrodes. Compared with the randomly immobilized anti-SAL/MPA/AuNS/SPCEs and the anti-SAL/PA(100 μg/mL):BSA(0 μg/mL)/MPA/AuNS/SPCE, the anti-SAL/PA(100 μg/mL): BSA(100 μg/mL)/MPA/AuNS/SPCE-based immunosensors have better sensing properties for SAL detection, with an extremely low detection limit of 0.2 fg/mL and high reproducibility (<2.5% relative standard deviation). The mixture of PA(100 μg/mL):BSA(100 μg/mL) for the modification of AuNS/SPCEs has great promise for forming an optimal protein layer for the oriented adsorption of IgG antibodies to construct ultrasensitive SAL immunosensors. Full article
(This article belongs to the Special Issue Smart Electrochemical Screen-Printed Platforms )
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Open AccessArticle
Electrochemically Reduced Graphene Oxide-Based Screen-Printed Electrodes for Total Tetracycline Determination by Adsorptive Transfer Stripping Differential Pulse Voltammetry
Sensors 2020, 20(1), 76; https://doi.org/10.3390/s20010076 - 21 Dec 2019
Cited by 2
Abstract
Disposable electrochemically reduced graphene oxide-based (ERGO) screen-printed electrodes (SPE) were developed for the determination of total tetracyclines as a sample screening approach. To this end, a selective adsorption-detection approach relied on adsorptive transfer stripping differential pulse voltammetry (AdTDPV) was devised, where the high [...] Read more.
Disposable electrochemically reduced graphene oxide-based (ERGO) screen-printed electrodes (SPE) were developed for the determination of total tetracyclines as a sample screening approach. To this end, a selective adsorption-detection approach relied on adsorptive transfer stripping differential pulse voltammetry (AdTDPV) was devised, where the high adsorption capacity and the electrochemical properties of ERGO were simultaneously exploited. The approach was very simple, fast (6 min.), highly selective by combining the adsorptive and the electrochemical features of tetracyclines, and it used just 10 μL of the sample. The electrochemical sensor applicability was demonstrated in the analysis of environmental and food samples. The not-fully explored AdTDPV analytical possibilities on disposable nanostructured transducers become a new tool in food and environmental fields; drawing new horizons for “in-situ” analysis. Full article
(This article belongs to the Special Issue Smart Electrochemical Screen-Printed Platforms )
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Open AccessArticle
Screen-Printed Soft-Nitrided Carbon Electrodes for Detection of Hydrogen Peroxide
Sensors 2019, 19(17), 3741; https://doi.org/10.3390/s19173741 - 29 Aug 2019
Abstract
Nitrogen-doped carbon materials have garnered much interest due to their electrocatalytic activity towards important reactions such as the reduction of hydrogen peroxide. N-doped carbon materials are typically prepared and deposited on solid conductive supports, which can sometimes involve time-consuming, complex, and/or costly procedures. [...] Read more.
Nitrogen-doped carbon materials have garnered much interest due to their electrocatalytic activity towards important reactions such as the reduction of hydrogen peroxide. N-doped carbon materials are typically prepared and deposited on solid conductive supports, which can sometimes involve time-consuming, complex, and/or costly procedures. Here, nitrogen-doped screen-printed carbon electrodes (N-SPCEs) were fabricated directly from a lab-formulated ink composed of graphite that was modified with surface nitrogen groups by a simple soft nitriding technique. N-SPCEs prepared from inexpensive starting materials (graphite powder and urea) demonstrated good electrocatalytic activity towards hydrogen peroxide reduction. Amperometric detection of H2O2 using N-SPCEs with an applied potential of −0.4 V (vs. Ag/AgCl) exhibited good reproducibility and stability as well as a reasonable limit of detection (2.5 µM) and wide linear range (0.020 to 5.3 mM). Full article
(This article belongs to the Special Issue Smart Electrochemical Screen-Printed Platforms )
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Open AccessArticle
Electrochemical Nanocomposite Single-Use Sensor for Dopamine Detection
Sensors 2019, 19(14), 3097; https://doi.org/10.3390/s19143097 - 13 Jul 2019
Cited by 5
Abstract
In this work, we report the development of a simple and sensitive sensor based on graphite screen-printed electrodes (GSPEs) modified by a nanocomposite film for dopamine (DA) detection. The sensor was realized by electrodepositing polyaniline (PANI) and gold nanoparticles (AuNPs) onto the graphite [...] Read more.
In this work, we report the development of a simple and sensitive sensor based on graphite screen-printed electrodes (GSPEs) modified by a nanocomposite film for dopamine (DA) detection. The sensor was realized by electrodepositing polyaniline (PANI) and gold nanoparticles (AuNPs) onto the graphite working electrode. The sensor surface was fully characterized by means of the cyclic voltammetry (CV) technique using [Fe(CN)6]4−/3− and [Ru(NH3)6]2+/3+ as redox probes. The electrochemical behavior of the nanocomposite sensor towards DA oxidation was assessed by differential pulse voltammetry (DPV) in phosphate buffer saline at physiological pH. The sensor response was found to be linearly related to DA concentration in the range 1–100 μM DA, with a limit of detection of 0.86 μM. The performance of the sensor in terms of reproducibility and selectivity was also studied. Finally, the sensor was successfully applied for a preliminary DA determination in human serum samples. Full article
(This article belongs to the Special Issue Smart Electrochemical Screen-Printed Platforms )
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Open AccessArticle
Non-Enzymatic Impedimetric Sensor Based on 3-Aminophenylboronic Acid Functionalized Screen-Printed Carbon Electrode for Highly Sensitive Glucose Detection
Sensors 2019, 19(7), 1686; https://doi.org/10.3390/s19071686 - 09 Apr 2019
Cited by 9
Abstract
A highly sensitive glucose sensor was prepared by a one-step method using 3-aminophenyl boronic acid as a unit of recognition and a screen-printed carbon electrode (SPCE) as an electrochemical transducer. Scanning Electron Microscopy confirmed the success of the functionalization of the SPCE due [...] Read more.
A highly sensitive glucose sensor was prepared by a one-step method using 3-aminophenyl boronic acid as a unit of recognition and a screen-printed carbon electrode (SPCE) as an electrochemical transducer. Scanning Electron Microscopy confirmed the success of the functionalization of the SPCE due to the presence of clusters of boronic acid distributed on the carbon surface. In agreement with the Electrochemical Impedance Spectroscopy (EIS) tests performed before and after the functionalization, Cyclic Voltammetry results indicated that the electroactivity of the electrode decreased 37.9% owing to the presence of the poly phenylboronic acid on the electrode surface. EIS revealed that the sensor was capable to selectively detect glucose at a broad range of concentrations (limit of detection of 8.53 × 10−9 M), not recognizing fructose and sucrose. The device presented a stable impedimetric response when immediately prepared but suffered the influence of the storage time and some interfering species (dopamine, NaCl and animal serum). The response time at optimized conditions was estimated to be equal to 4.0 ± 0.6 s. Full article
(This article belongs to the Special Issue Smart Electrochemical Screen-Printed Platforms )
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Open AccessArticle
Design and Characterization of Effective Ag, Pt and AgPt Nanoparticles to H2O2 Electrosensing from Scrapped Printed Electrodes
Sensors 2019, 19(7), 1685; https://doi.org/10.3390/s19071685 - 09 Apr 2019
Cited by 5
Abstract
The use of disposable screen-printed electrodes (SPEs) has extraordinarily grown in the last years. In this paper, conductive inks from scrapped SPEs were removed by acid leaching, providing high value feedstocks suitable for the electrochemical deposition of Ag, Pt and Ag core-Pt shell-like [...] Read more.
The use of disposable screen-printed electrodes (SPEs) has extraordinarily grown in the last years. In this paper, conductive inks from scrapped SPEs were removed by acid leaching, providing high value feedstocks suitable for the electrochemical deposition of Ag, Pt and Ag core-Pt shell-like bimetallic (AgPt) nanoparticles, onto screen-printed carbon electrodes (ML@SPCEs, M = Ag, Pt or AgPt, L = metal nanoparticles from leaching solutions). ML@SPCEs were characterized by scanning electron microscopy, cyclic voltammetry and electrochemical impedance spectroscopy. The results were compared to those obtained when metal nanoparticles were synthesised using standard solutions of metal salts (MS@SPCEs). Both ML@SPCEs and MS@SPCEs exhibited similar cyclic voltammetric patterns referred to the electrochemical stripping of silver or the adsorption/desorption of hydrogen/anions in the case of platinum, proving leaching solutions extremely effective for the electrodeposition of metallic nanoparticles. The use of both ML@SPCEs and MS@SPCEs proved effective in enhancing the sensitivity for the detection of H2O2 in phosphate buffer solutions (pH = 7). The AgPtL@SPCE was used as proof of concept for the validation of an amperometric sensor for the determination of H2O2 within laundry boosters and antiseptic samples. The electrochemical sensor gave good agreement with the results obtained by a spectrophotometric method with H2O2 recoveries between 100.6% and 106.4%. Full article
(This article belongs to the Special Issue Smart Electrochemical Screen-Printed Platforms )
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Open AccessArticle
Effect of Poly-l-Lysine Polycation on the Glucose Oxidase/Ferricyanide Composite-Based Second-Generation Blood Glucose Sensors
Sensors 2019, 19(6), 1448; https://doi.org/10.3390/s19061448 - 25 Mar 2019
Abstract
Second-generation glucose biosensors are presently the mainstream commercial solution for blood glucose measurement of diabetic patients. Screen-printed carbon electrodes (SPCEs) are the most-used substrate for glucose testing strips. This study adopted hydrophilic and positively charged α-poly-l-lysine (αPLL) as the entrapment matrix [...] Read more.
Second-generation glucose biosensors are presently the mainstream commercial solution for blood glucose measurement of diabetic patients. Screen-printed carbon electrodes (SPCEs) are the most-used substrate for glucose testing strips. This study adopted hydrophilic and positively charged α-poly-l-lysine (αPLL) as the entrapment matrix for the immobilization of negatively charged glucose oxidase (GOx) and ferricyanide (FIC) on SPCEs to construct a disposable second-generation glucose biosensor. The αPLL modification is shown to facilitate the redox kinetics of FIC and ferrocyanide on the SPCEs. The SPCEs coated with 0.5 mM GOx, 99.5 mM FIC, and 5 mM αPLL had better sensitivity for glucose detection due to the appreciable effect of protonated αPLL on the promotion of electron transfer between GOx and FIC. Moreover, the SPCEs coated with 0.5 mM GOx, 99.5 mM FIC, and 5 mM αPLL were packaged as blood glucose testing strips for the measurement of glucose-containing human serum samples. The glucose testing strips had good linearity from 2.8 mM to 27.5 mM and a detection limit of 2.3 mM. Moreover, the 5 mM αPLL-based glucose testing strips had good long-term stability to maintain GOx activity in aging tests at 50 °C. Full article
(This article belongs to the Special Issue Smart Electrochemical Screen-Printed Platforms )
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