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Optical and Electrochemical Sensors for Biomedical and Environmental Applications
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Optical and Electrochemical Sensors for Biomedical and Environmental Applications

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

Deadline for manuscript submissions: closed (25 April 2023) | Viewed by 5399

Special Issue Editors

Dr. Abu ul Hassan S. Rana

E-Mail Website
Guest Editor
Department of Electrical and Electronic Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
Interests: nanoelectronics; nano-biosensors; optoelectronics; toxic gas sensors; photodetectors; advanced functional nanomaterials; internet of things; healthcare; nanofabrication and characterization; pH sensors; biomedical engineering; remote sensors.
Special Issues, Collections and Topics in MDPI journals
Dr. Fiona C. Brownfoot

E-Mail Website
Guest Editor
Department of Medicine Dentistry and Health Sciences, Obstetrics and Gynaecology, The University of Melbourne, Parkville, VIC 3010, Australia
Interests: biomedical nanosensors; healthcare; surgery, pH sensors; optical sensors; fetal distress monitoring; ECG; lactate sensors; nanoscience in diagnostics; tissue engineering; signals and data science
Prof. Dr. Marimuthu Palaniswami

E-Mail Website
Guest Editor
Department of Electrical and Electronic Engineering, The University of Melbourne, Parkville, VIC 3010, Australia
Interests: sensors; biosensors; crystalline materials; artificial intelligence
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The prime focus of this special issue is to highlight the novel trends in the nanofabrication of optical and electrochemical sensors for biomedical and environmental applications. Ultraviolet (UV), pH and electronic-nose (gas sensors) have potential in biomedical and environmental applications. The UV sensors are used to identify tumor and cancerous tissues in human body and to detect the high UV regions in our environment to prevent skin cancer. Similarly, invasive and non-invasive pH sensors have plethora of biomedical and environmental applications including determination of severity of illness in human body via blood pH monitoring and speculating the food spoilage in Agtech. Furthermore, one of the most important factors in environmental monitoring is to gauge the presence of toxic gases around us. Hence, toxic gas sensors or electronic nose systems have many environmental, biological and agricultural applications. The Special issue targets the recently invented novel methods to fabricate optical and electrochemical sensors. We encourage the industrial and academic scientists to submit their experimental and theoretical results in the form of original articles, review papers and short communications.

Potential topics include but are not limited to:

  1. Optical and electrochemical toxic gas sensors
  2. Electronic-nose systems and remote sensors
  3. Optical and potentiometric pH sensors
  4. Ultraviolet (UV) sensors and photodetectors
  5. Advanced functional nanomaterials and coatings for biomedical and environmental applications

Dr. Abu ul Hassan S. Rana
Dr. Fiona C. Brownfoot
Prof. Dr. Marimuthu Palaniswami
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. 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 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

  • optical sensors
  • electrochemical sensors
  • healthcare and biomedicine
  • environmental monitoring
  • pH sensors
  • UV sensors
  • electronic-nose
  • agtech
  • nanoelectronics
  • food and agriculture
  • field effect transistors
  • optic fiber
  • optoelectronics
  • nanoelectronics
  • advance functional nanomaterials
  • chemresistive sensors
  • sensors systems
  • IoT and remote sensing
  • sensors and actuators

Published Papers (2 papers)

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Research

14 pages, 3723 KiB  
Article
Effect of Pd-Sensitization on Poisonous Chlorine Gas Detection Ability of TiO2: Green Synthesis and Low-Temperature Operation
by Satish Ekar, Umesh T. Nakate, Yogesh B. Khollam, Shoyebmohamad F. Shaikh, Rajaram S. Mane, Abu ul Hassan S. Rana and Marimuthu Palaniswami
Sensors 2022, 22(11), 4200; https://doi.org/10.3390/s22114200 - 31 May 2022
Cited by 2 | Viewed by 2069
Abstract
Ganoderma lucidum mushroom-mediated green synthesis of nanocrystalline titanium dioxide (TiO2) is explored via a low-temperature (≤70 °C) wet chemical method. The role of Ganoderma lucidum mushroom extract in the reaction is to release the ganoderic acid molecules that tend to bind [...] Read more.
Ganoderma lucidum mushroom-mediated green synthesis of nanocrystalline titanium dioxide (TiO2) is explored via a low-temperature (≤70 °C) wet chemical method. The role of Ganoderma lucidum mushroom extract in the reaction is to release the ganoderic acid molecules that tend to bind to the Ti4+ metal ions to form a titanium-ganoderic acid intermediate complex for obtaining TiO2 nanocrystallites (NCs), which is quite novel, considering the recent advances in fabricated gas sensing materials. The X-ray powder diffraction, field emission scanning electron microscopy, Raman spectroscopy, and Brunauer–Emmett–Teller measurements etc., are used to characterize the crystal structure, surface morphology, and surface area of as-synthesized TiO2 and Pd-TiO2 sensors, respectively. The chlorine (Cl2) gas sensing properties are investigated from a lower range of 5 ppm to a higher range of 400 ppm. In addition to excellent response–recovery time, good selectivity, constant repeatability, as well as chemical stability, the gas sensor efficiency of the as-synthesized Pd-TiO2 NC sensor is better (136% response at 150 °C operating temperature) than the TiO2 NC sensor (57% at 250 °C operating temperature) measured at 100 ppm (Cl2) gas concentration, suggesting that the green synthesized Pd-TiO2 sensor demonstrates efficient Cl2 gas sensing properties at low operating temperatures over pristine ones. Full article
(This article belongs to the Special Issue Optical and Electrochemical Sensors for Biomedical and Environmental Applications)
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19 pages, 7174 KiB  
Article
Development and Optimization of Hybrid Polymeric Nanoparticles of Apigenin: Physicochemical Characterization, Antioxidant Activity and Cytotoxicity Evaluation
by Ameeduzzafar Zafar, Nabil K. Alruwaili, Syed Sarim Imam, Omar Awad Alsaidan, Mohammed Muqtader Ahmed, Mohd Yasir, Musarrat Husain Warsi, Ali Alquraini, Mohammed M. Ghoneim and Sultan Alshehri
Sensors 2022, 22(4), 1364; https://doi.org/10.3390/s22041364 - 10 Feb 2022
Cited by 14 | Viewed by 2506
Abstract
Breast cancer is the most common cancer in females and ranked second after skin cancer. The use of natural compounds is a good alternative for the treatment of breast cancer with less toxicity than synthetic drugs. The aim of the present study is [...] Read more.
Breast cancer is the most common cancer in females and ranked second after skin cancer. The use of natural compounds is a good alternative for the treatment of breast cancer with less toxicity than synthetic drugs. The aim of the present study is to develop and characterize hybrid Apigenin (AN) Nanoparticles (NPs) for oral delivery (AN-NPs). The hybrid AN-NPs were prepared by the self-assembly method using lecithin, chitosan and TPGS. Further, the NPs were optimized by Box-Behnken design (3-factor, 3-level). The hybrid NPs were evaluated for particle size (PS), entrapment efficiency (EE), zeta potential (ZP), and drug release. The optimized hybrid NPs (ON2), were further evaluated for solid state characterization, permeation, antioxidant, cytotoxicity and antimicrobial study. The formulation (ON2) exhibited small PS of 192.6 ± 4.2 nm, high EE 69.35 ± 1.1%, zeta potential of +36.54 mV, and sustained drug release (61.5 ± 2.5% in 24 h), as well as significantly (p < 0.05) enhanced drug permeation and antioxidant activity. The IC50 of pure AN was found to be significantly (p < 0.05) lower than the formulation (ON2). It also showed significantly greater (p < 0.05) antibacterial activity than pure AN against Bacillus subtilis and Salmonella typhimurium. From these findings, it revealed that a hybrid AN polymeric nanoparticle is a good carrier for the treatment of breast cancer. Full article
(This article belongs to the Special Issue Optical and Electrochemical Sensors for Biomedical and Environmental Applications)
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