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Recent Developments in Electrochemical Sensors and Biosensors for Applications to Agri-Food, Environmental, and Biomedical Analysis

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Chemical and Molecular Sciences".

Deadline for manuscript submissions: closed (31 July 2020) | Viewed by 4598

Special Issue Editors


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Guest Editor
Faculty of Creative Arts, Technologies and Science, University of Bedfordshire, Luton, UK
Interests: chemical sensors; biosensors; analytical science; electroanalysis; solution thermodynamics; process instrumentation; chemical speciation
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
University of Lancaster UK
Interests: analytical science; electroanalytical sensors and sensing systems; electrokinetic separations; microfluidics and lab-on-a-chip devices; high throughput analysis for drug discovery, formulation, and life science research

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Guest Editor
University of the West of England, Bristol, UK
Interests: electroanalysis; design, development and application of screen-printed electrochemical sensors and biosensors for environmental, agri and biomedical applications

Special Issue Information

Dear Colleagues,

Electrochemistry has been the basis of a raft of analytical techniques for over 100 years. Originally macro in scope and laboratory based, electroanalysis has evolved to encompass sensing systems—often micro—for a wide variety of applications; these include agri-food, environmental, and biomedical areas. Increasingly, sensors and biosensors incorporate modern innovations, such as telemetry, onboard processing, and intelligent materials

This Special Issue will celebrate electroanalysis by publishing high-quality, original contributions in these application areas.

Prof. Dr. Brian Birch
Prof. Dr. Peter Fielden
Prof. Dr. John Hart
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. Applied Sciences 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 2400 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

  • electroanalysis
  • sensors
  • biosensors

Published Papers (1 paper)

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Research

14 pages, 8443 KiB  
Article
Construction of Silver Quantum Dot Immobilized Zn-MOF-8 Composite for Electrochemical Sensing of 2,4-Dinitrotoluene
by Sushma Rani, Bharti Sharma, Shivani Kapoor, Rajesh Malhotra, Rajender S. Varma and Neeraj Dilbaghi
Appl. Sci. 2019, 9(22), 4952; https://doi.org/10.3390/app9224952 - 18 Nov 2019
Cited by 20 | Viewed by 4328
Abstract
In the present study, we report a highly effective electrochemical sensor for detecting 2,4-dinitrotoluene (2,4-DNT). The amperometric determination of 2,4-DNT was carried out using a gold electrode modified with zinc–metal organic framework-8 and silver quantum dot (Zn-MOF-8@AgQDs) composite. The synthesized nanomaterials were characterized [...] Read more.
In the present study, we report a highly effective electrochemical sensor for detecting 2,4-dinitrotoluene (2,4-DNT). The amperometric determination of 2,4-DNT was carried out using a gold electrode modified with zinc–metal organic framework-8 and silver quantum dot (Zn-MOF-8@AgQDs) composite. The synthesized nanomaterials were characterized by using transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR) and X-ray powder diffraction (XRD). The synthesized nanocomposite proved to be efficient in electro-catalysis thereby reducing the 2,4-DNT. The unique combination present in Zn-MOF-8@AgQDs composite offered an excellent conductivity and large surface area enabling the fabrication of a highly sensitive (−0.238 µA µM−1 cm−2), selective, rapid and stable 2,4-DNT sensor. The dynamic linear range and limit of detection (LOD) was about 0.0002 µM to 0.9 µM and 0.041 µM, respectively. A 2,4-DNT reduction was also observed during the linear sweep voltammetry (LSV) experiments with reduction peaks at −0.49 V and −0.68 V. This is an unprecedented report with metal organic framework (MOF) composite for sensing 2,4-DNT. In addition, the presence of other species such as thiourea, urea, ammonia, glucose, and ascorbic acid displayed no interference in the modified electrode suggesting its practicability in various environmental applications. Full article
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