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Biosensors for Biomedical and Environmental Applications, Third Edition

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Special Issue Editor

Special Issue Information

Dear Colleagues,

We are pleased to announce a Special Issue of Micromachines focusing on "Biosensors for Biomedical and Environmental Applications, Third Edition".

Biosensors are powerful tools in the detection of biomarkers, pollutants, xenobiotics and contaminants, and their evolution has the power to significantly improve medical diagnosis processes as well as environmental health monitoring. The last two years witnessed a boost in interest towards biosensing technologies, mostly due to the pandemic’s effects, but also due to ecological concerns related to the global environmental emergency.

Biosensors can be categorized depending on their sensing element, the relevant support, the transduction mechanism, or their intended application, and great scientific effort has been devoted to improving and optimizing all these aspects in order to enhance the selectivity and sensitivity of existing sensors, while exploring the way to novel devices. Contributions stemming from chemistry, biology, physics, engineering, computation and medicine intertwine and complement one another, making research in this multidisciplinary field vibrant and dynamic.

This Special Issue aims to provide an overview regarding recent advances in the design and production of novel biosensors, with special focus on novel sensing elements, immobilization techniques, detection strategies and miniaturization. Emphasis is placed on aspects related to the micro- and nano-conception of these devices.

Dr. Antonella Battisti
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. Micromachines 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 2600 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

sensors
biosensors
environmental sensors
biomedical sensors
food sensors
quality control
nanosystems
nanomaterials
immobilization technologies
aptamer-based biosensors
enzyme-based biosensors
cell-based biosensors
DNA-based biosensors
immunosensors
lab on a chip (LOC)
miniaturization
microstructured sensors
nanostructured sensors
biomarkers detection
pollutants detection
contaminants detection
xenobiotics detection

Related Special Issue

Published Papers (1 paper)

Research

15 pages, 4414 KiB

Open AccessArticle

Ti₃AlC₂ MAX Phase Modified Screen-Printed Electrode for the Fabrication of Hydrazine Sensor

by Khursheed Ahmad, Waseem Raza and Rais Ahmad Khan

Micromachines 2024, 15(5), 633; https://doi.org/10.3390/mi15050633 - 9 May 2024

Viewed by 364

Abstract

Hydrazine is considered a powerful reducing agent and catalyst, showing diverse applications in agricultural industries, toxic degradation research, and wastewater management. Additionally, hydrazine can trigger some specific reactions when combined with suitable oxidants. Due to its highly polar nature, hydrazine can easily dissolve in alcohol, water, and various other polar solvents. Therefore, it can be extensively utilized in different areas of application and industries such as rocketry and various chemical applications. Despite its beneficial properties, hydrazine is unstable, posing significant risk due to its highly toxic nature. It is extremely hazardous to both human health and the environment. It can cause various illnesses and symptoms such as dizziness, temporary blindness, damage to the central nervous system, and even death when inhaled in sufficient quantities. Therefore, it is highly important to monitor the level of hydrazine to prevent its toxic and hazardous effects on human beings and the environment. In the present study, we discuss the simple fabrication of a disposable cost-effective and eco-friendly hydrazine sensor. We used a screen-printed carbon electrode, i.e., SPCE, as a base for the construction of a hydrazine sensor. The Ti₃AlC₂ MAX has been used as a suitable and efficient electrode material for the fabrication of disposable hydrazine sensors. We modified the active surface of the SPCE using a drop-casting approach. The resulting Ti₃AlC₂ MAX modified SPCE (Ti₃AlC₂@SPCE) has been utilized as an efficient and low-cost hydrazine sensor. Cyclic voltammetry, i.e., CV, and linear sweep voltammetry, viz., LSV, was employed as a sensing technique in this study. The optimization of pH and electrode material loading was conducted. The Ti₃AlC₂@SPCE exhibited excellent sensing performance toward hydrazine oxidation. A reasonable detection limit (0.01 µM) was achieved for hydrazine sensing. The fabricated sensor also demonstrated a reasonable linear range of 1–50 µM. This work provides the design and fabrication of simple disposable Ti₃AlC₂@SPCE as a suitable electrode for the determination of hydrazine using LSV technology. Full article

(This article belongs to the Special Issue Biosensors for Biomedical and Environmental Applications, Third Edition)

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