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Nanomaterials-Based Electrochemical (Bio)Sensors: Design, Fabrication, and Applications

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A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanoelectronics, Nanosensors and Devices".

Deadline for manuscript submissions: closed (31 March 2023) | Viewed by 3894

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Special Issue Editor

Dr. Guangli Li

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Guest Editor

College of Life Sciences and Chemistry, Hunan University of Technology, Zhuzhou 300450, China
Interests: (bio)electrochemical sensors; nanomaterials and nanosensors; biopotential electrodes; medical sensors
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Electrochemical (bio)sensors have shown promising application prospects in many emerging areas, such as the on-site detection of biomarkers, contaminants, and wearable health-monitoring devices. Among these, nanomaterial-based electrochemical (bio)sensors are highly desirable, due to unique properties, such as high electrocatalytic activity, large surface area, and good biocompatibility. Nanomaterials (carbon nanotubes, graphene, carbon dots, black phosphorus, MXene, etc.) play a critical role in the fabrication of novel electrochemical (bio)sensors, in response to the increasingly complex needs of environmental monitoring, food safety, health monitoring, point-of-care diagnostics, and wearable devices. In particular, the development of emerging 2D nanomaterials and nanotechnologies has made it possible to accelerate innovation in the electrochemical biosensor field by offering increased stability, sensitivity, and selectivity of analysis.

This Special Issue, devoted to nanomaterial-based electrochemical sensors, will offer a comprehensive selection of recent research works, short communications, and review articles, focused on nanomaterials, design, fabrication methods, and applications of nanomaterial-based electrochemical sensors, including, but not limited to, modified electrodes, aptamer sensors, ECL sensors, enzyme electrodes, and immunosensors. All manuscripts considered for publication in this section will undergo a rigorous peer-review process and decisions are based on the recommendations of independent reviewers.

Dr. Guangli Li
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. Nanomaterials 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 2900 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
paper-based electrochemical sensors
modified electrodes
aptamer electrochemical sensors
enzyme electrodes
electrochemical immunosensor
ECL sensors
wearable electrochemical sensors
molecular imprinting polymer
nanocomposite
graphene
black phosphorus
MXene

Published Papers (3 papers)

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Research

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15 pages, 3702 KiB

Open AccessArticle

An Efficient Voltammetric Sensor Based on Graphene Oxide-Decorated Binary Transition Metal Oxides Bi₂O₃/MnO₂ for Trace Determination of Lead Ions

by Guangli Li, Xiaoman Qi, Yang Xiao, Yuchi Zhao, Kanghua Li, Yonghui Xia, Xuan Wan, Jingtao Wu and Chun Yang

Nanomaterials 2022, 12(19), 3317; https://0-doi-org.brum.beds.ac.uk/10.3390/nano12193317 - 23 Sep 2022

Cited by 11 | Viewed by 1612

Abstract

Herein we present a facile synthesis of the graphene oxide-decorated binary transition metal oxides of Bi₂O₃ and MnO₂ nanocomposites (Bi₂O₃/MnO₂/GO) and their applications in the voltammetric detection of lead ions (Pb²⁺) in water samples. The surface morphologies, crystal structures, electroactive surface area, and charge transferred resistance of the Bi₂O₃/MnO₂/GO nanocomposites were investigated through the scanning electron microscopy (SEM), power X-ray diffraction (XRD), cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) techniques, respectively. The Bi₂O₃/MnO₂/GO nanocomposites were further decorated onto the surface of a glassy carbon electrode (GCE), and Pb²⁺ was quantitatively analyzed by using square-wave anodic stripping voltammetry (SWASV). We explored the effect of the analytical parameters, including deposition potential, deposition time, and solution pH, on the stripping peak current of Pb²⁺. The Bi₂O₃/MnO₂/GO nanocomposites enlarged the electroactive surface area and reduced the charge transferred resistance by significant amounts. Moreover, the synergistic enhancement effect of MnO₂, Bi₂O₃ and GO endowed Bi₂O₃/MnO₂/GO/GCE with extraordinary electrocatalytic activity toward Pb²⁺ stripping. Under optimal conditions, the Bi₂O₃/MnO₂/GO/GCE showed a broad linear detection range (0.01–10 μM) toward Pb²⁺ detection, with a low limit of detection (LOD, 2.0 nM). The proposed Bi₂O₃/MnO₂/GO/GCE electrode achieved an accurate detection of Pb²⁺ in water with good recoveries (95.5–105%). Full article

(This article belongs to the Special Issue Nanomaterials-Based Electrochemical (Bio)Sensors: Design, Fabrication, and Applications)

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10 pages, 1974 KiB

Open AccessArticle

Synthesis of Co₃O₄ Nanoplates by Thermal Decomposition for the Colorimetric Detection of Dopamine

by Zengmin Tang, Ling Zhang, Sijia Tang, Junping Li, Jianxiong Xu, Na Li, Lijian Xu and Jingjing Du

Nanomaterials 2022, 12(17), 2990; https://0-doi-org.brum.beds.ac.uk/10.3390/nano12172990 - 29 Aug 2022

Cited by 6 | Viewed by 1464

Abstract

Inorganic nanomaterials with enzyme-like activity have been attracting much attention due to their low cost, favorable stability, convenient storage, and simple preparation. Herein, Co₃O₄ nanoplates with a uniform nanostructure were prepared by the thermolysis of cobalt hydroxide at different temperatures, and the influence of the annealing temperature on the performance of the mimetic enzyme also was reported for the first time. The results demonstrated that Co₃O₄ nanoplates obtained at an annealing temperature of 200 °C possessed strong oxidase activity and efficiently catalyzed the oxidation of 3,3′,5,5′-tetramethylbenzidine (TMB) without the addition of hydrogen peroxide to generate the blue color product ox-TMB. Once the annealing temperature was increased to 500 °C and 800 °C, the oxidase activity of Co₃O₄ decreased rapidly, and was even inactivated. This might be attributed to the relatively large specific surface area of Co₃O₄ annealed at 200 °C. Besides this, based on the TMB-Co₃O₄ nanoplate system, a colorimetric analysis method was developed to detect dopamine with a limit of 0.82 μmol/L in a linear range from 1.6 μmol/L to 20 μmol/L. Full article

(This article belongs to the Special Issue Nanomaterials-Based Electrochemical (Bio)Sensors: Design, Fabrication, and Applications)

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Review

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17 pages, 2941 KiB

Open AccessReview

Emerging Two-Dimensional Materials-Based Electrochemical Sensors for Human Health and Environment Applications

by Muhammad Atif Khan, Faizan Ramzan, Muhammad Ali, Muhammad Zubair, Muhammad Qasim Mehmood and Yehia Massoud

Nanomaterials 2023, 13(4), 780; https://0-doi-org.brum.beds.ac.uk/10.3390/nano13040780 - 20 Feb 2023

Cited by 9 | Viewed by 2270

Abstract

Two-dimensional materials (2DMs) have been vastly studied for various electrochemical sensors. Among these, the sensors that are directly related to human life and health are extremely important. Owing to their exclusive properties, 2DMs are vastly studied for electrochemical sensing. Here we have provided a selective overview of 2DMs-based electrochemical sensors that directly affect human life and health. We have explored graphene and its derivatives, transition metal dichalcogenide and MXenes-based electrochemical sensors for applications such as glucose detection in human blood, detection of nitrates and nitrites, and sensing of pesticides. We believe that the areas discussed here are extremely important and we have summarized the prominent reports on these significant areas together. We believe that our work will be able to provide guidelines for the evolution of electrochemical sensors in the future. Full article

(This article belongs to the Special Issue Nanomaterials-Based Electrochemical (Bio)Sensors: Design, Fabrication, and Applications)

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