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Molecules
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Functional Materials for Electrochemical Sensors and Detectors: Current Status and...
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Functional Materials for Electrochemical Sensors and Detectors: Current Status and Future Perspectives

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Electrochemistry".

Deadline for manuscript submissions: 31 May 2024 | Viewed by 1656

Special Issue Editors

Prof. Dr. Limin Lu

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Guest Editor
College of Chemistry and Materials, Jiangxi Agricultural University, Nanchang 330045, China
Interests: biochemical analysis; biosensors
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Songbai Zhang

E-Mail Website
Guest Editor
College of Chemistry and Materials Engineering, Hunan University of Arts and Science, Changde 415000, China
Interests: nucleic acid probes; functional nucleic acid; biosensors; nanomaterials; drug delivery
Special Issues, Collections and Topics in MDPI journals
Dr. Linyu Wang

E-Mail Website
Guest Editor
College of Chemistry and Materials, Jiangxi Agricultural University, Nanchang 330045, China
Interests: construction of electrochemical sensing interfaces; development and application of novel electrode materials
Dr. Yansha Gao

E-Mail Website
Guest Editor
Key Laboratory of Crop Physiology, Ecology and Genetic Breeding, Ministry of Education, Key Laboratory of Chemical Utilization of Plant Resources of Nanchang, College of Science, Jiangxi Agricultural University, Nanchang 330045, China
Interests: biosensor; electrochemistry; DNA; genetic testing; drug delivery; fluorescence-based techniques; bioimaging

Special Issue Information

Dear Colleagues,

Sensors and detectors convert the interaction of an analyte into a measurable signal. In particular, optical and electrochemical sensors and detectors have developed rapidly in recent years. With the integration of nanomaterials, they have become an ideal platform for the fabrication of optical or electrochemical sensors due to their unique properties compared to bulk materials, with the additional advantage of enhanced sensitivity and their ability to rapidly detect multiple analytes. This Special Issue aims to present recent research results on optical and electrochemical sensors and detectors, and we thus welcome the submission of original and review articles on the synthesis, characterization, and application of novel functional nanomaterials (carbon, semiconductors, metal–organic frameworks, covalent organic frameworks, organic–inorganic nanocomposites, etc.) with unique properties for optical and electrochemical sensors.

We welcome the submission of original research articles concerning functional materials for various sensor applications. Before submission, authors should carefully read over the journal’s Author Instructions, which can be found at https://www.mdpi.com/journal/molecules/instructions.

Prof. Dr. Limin Lu
Prof. Dr. Songbai Zhang
Dr. Linyu Wang
Dr. Yansha Gao
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. Molecules 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 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

  • functional nanomaterials
  • carbon
  • semiconductor
  • metal–organic framework
  • covalent–organic framework
  • polymer
  • organic–inorganic nanocomposites
  • optical sensors
  • electrochemical sensors

Published Papers (2 papers)

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Research

14 pages, 3753 KiB  
Article
A Molecularly Imprinted Electrochemical Sensor Based on TiO2@Ti3C2Tx for Highly Sensitive and Selective Detection of Chlortetracycline
by Linbo Deng, Jiawei Liu, Haiyan Huang, Changxi Deng, Limin Lu, Linyu Wang and Xiaoqiang Wang
Molecules 2023, 28(22), 7475; https://doi.org/10.3390/molecules28227475 - 08 Nov 2023
Cited by 1 | Viewed by 734
Abstract
In view of the serious side effects of chlortetracycline (CTC) on the human body, it is particularly important to develop rapid, sensitive, and selective technologies for the detection of CTC in food. In this work, a molecularly imprinted electrochemical sensor with [Fe(CN)6 [...] Read more.
In view of the serious side effects of chlortetracycline (CTC) on the human body, it is particularly important to develop rapid, sensitive, and selective technologies for the detection of CTC in food. In this work, a molecularly imprinted electrochemical sensor with [Fe(CN)6]3−/4− as signal probe was proposed for the highly sensitive and selective detection of CTC. For this purpose, TiO2, which acts as an interlayer scaffold, was uniformly grown on the surface of Ti3C2Tx sheets through a simple two-step calcination process using Ti3C2Tx as the precursor to effectively avoid the stacking of Ti3C2Tx layers due to hydrogen bonding and van der Waals forces. This endowed TiO2@Ti3C2Tx with large specific surface, abundant functional sites, and rapid mass transfer. Then, polypyrrole molecularly imprinted polymers (MIPs) with outstanding electrical conductivity were modified on the surface of TiO2@Ti3C2Tx via simple electro-polymerization, where the pyrrole was employed as a polymeric monomer and the CTC provided a source of template molecules. This will not only provide specific recognition sites for CTC, but also facilitate electron transport on the electrode surface. The synergistic effects between TiO2@Ti3C2Tx and polypyrrole MIPs afforded the TiO2@Ti3C2Tx/MIP-based electrochemical sensor excellent detection properties toward CTC, including ultra-low limits of detection (LOD) (0.027 nM), a wide linear range (0.06–1000 nM), and outstanding stability, reproducibility, selectivity, and feasibility in real samples. The results indicate that this strategy is feasible and will broaden the horizon for highly sensitive and selective detection of CTC. Full article
(This article belongs to the Special Issue Functional Materials for Electrochemical Sensors and Detectors: Current Status and Future Perspectives)
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12 pages, 2959 KiB  
Article
Study on the Biomolecular Competitive Mechanism of Polybrominated Diphenyl Ethers and Their Derivatives on Thyroid Hormones
by Shaoheng Liu, Rong Hu, Hao Zhan, Wanli You, Jianjun Tao and Luhua Jiang
Molecules 2023, 28(21), 7374; https://doi.org/10.3390/molecules28217374 - 31 Oct 2023
Cited by 1 | Viewed by 751
Abstract
Polybrominated diphenyl ethers (PBDEs) are widely used brominated flame retardants. PBDEs and their derivatives, hydroxylated PBDEs (OH-PBDEs), can bind to hormone receptors and impact hormone secretion, transportation, and metabolism, leading to endocrine disruption and the development of various diseases. They have particularly strong [...] Read more.
Polybrominated diphenyl ethers (PBDEs) are widely used brominated flame retardants. PBDEs and their derivatives, hydroxylated PBDEs (OH-PBDEs), can bind to hormone receptors and impact hormone secretion, transportation, and metabolism, leading to endocrine disruption and the development of various diseases. They have particularly strong interference effects on thyroid hormones. This study used decabromodiphenyl ether (BDE-209); 2,2′,4,4′-tetrabromodiphenyl ether (BDE-47); and 6-OH-BDE-47 as representative compounds of PBDEs and their derivatives, OH-PBDEs. A fluorescence probe, fluorescein-isothiocyanate-L-thyroxine (FITC-T4, F-T4), specific for binding to transthyretin (TTR), a thyroid transport protein, was prepared. The binding capacity of PBDEs and their derivatives, OH-PBDEs, to TTR was quantitatively measured using fluorescence spectroscopy. The principle of quenching the fluorescence intensity of F-T4 after binding to TTR was used to analyze the competitive interaction between the probe and BDE-209, BDE-47, and 6-OH-BDE-47, thereby evaluating the toxic effects of PBDEs and their derivatives on the thyroid system. Additionally, AutoDock molecular docking software (1.5.6) was used to further analyze the interference mechanism of OH-PBDEs on T4. The results of the study are as follows: (1) Different types of PBDEs and OH-PBDEs exhibit varying degrees of interference with T4. Both the degree of bromination and hydroxylation affect their ability to competitively bind to TTR. Higher bromination and hydroxylation degrees result in stronger competitive substitution. (2) The competitive substitution ability of the same disruptor varies at different concentrations. Higher concentrations lead to stronger substitution ability, but there is a threshold beyond which the substitution ability no longer increases. (3) When OH-PBDEs have four or more bromine atoms and exhibit the most structural similarity to T4, their binding affinity to TTR is stronger than that of T4. Full article
(This article belongs to the Special Issue Functional Materials for Electrochemical Sensors and Detectors: Current Status and Future Perspectives)
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