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Biosensors
Special Issues
Recent Advances in Nanomaterial-Enhanced Gas Sensing
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Recent Advances in Nanomaterial-Enhanced Gas Sensing

A special issue of Biosensors (ISSN 2079-6374). This special issue belongs to the section "Biosensor and Bioelectronic Devices".

Deadline for manuscript submissions: closed (31 March 2023) | Viewed by 8631

Special Issue Editors

Dr. Elena Dilonardo

E-Mail Website
Guest Editor
Institute of Nanotechnology, CNR-NANOTEC, c/o Department of Chemistry, Università degli Studi di Bari, Via Orabona 4, 70126 Bari, Italy
Interests: material chemistry; nanomaterials; sensors; biosensors; surface chemistry; material characterization
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Antonio Tricoli

E-Mail Website
Guest Editor
Faculty of Engineering, University of Sydney, Sydney, NSW 2006, Australia
Interests: biomedical sensors; renewable energy storate; renewable fuels; functional coatings; nanomaterials; electrochemistry

Special Issue Information

Dear Colleagues,

The ongoing progress in nanoscience and nanotechnology is providing nanomaterials more attractive structural and functional properties to be used as sensing layers in gas-sensor devices. Therefore, the research in the field of gas sensors is challenging, and it always renews on the basis of innovation in the preparation and functionalization of new nanomaterials as gas sensing layers. Many advances give the opportunity to develop gas sensors based on nanomaterials with enhanced properties such as high sensitivity, selectivity, low-power consumption, and miniaturized size.

Gas-sensing material nanostructures, from one- to three dimensions, have been prepared by various means, both physical and chemical, and they have been integrated in different transducer platforms, such as resistive, conductometric, electrochemical, resonant, or optoelectronic gas-sensor devices. Nowadays, the major application fields of gas-sensor devices are environmental monitoring, breath analysis, healthcare and biomedical applications, and food quality and safety.

This Special Issue of Biosensors will be dedicated to highlighting the recent advances in the enhancement of the gas-sensing properties of nanomaterials.

Full papers, communications, and reviews are welcome. Topics include, but are not limited to, the following:

  • Nanomaterials and/or functionalized nanomaterials with enhanced gas-sensing properties (e.g., metal-oxides, polymers, carbon-based nanomaterials, hybrid organic–inorganic nanocomposites, etc.);
  • The synthesis, functionalization, and deposition techniques of nanomaterials as sensing layers;
  • The fabrication and development of resistive, conductometric, electrochemical, resonant, or optoelectronic gas-sensor devices based on nanomaterial sensing layers.
  • Applications (environment-pollution control, food safety and quality, healthcare and biomedics, breath analysis).

Dr. Elena Dilonardo
Prof. Dr. Antonio Tricoli
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. Biosensors 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 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

  • gas sensors
  • nanomaterials
  • nanomaterial functionalization
  • environmental monitoring
  • food safety
  • healthcare
  • biomedics
  • breath analysis

Published Papers (3 papers)

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Research

16 pages, 7280 KiB  
Article
Two-in-One Sensor Based on PV4D4-Coated TiO2 Films for Food Spoilage Detection and as a Breath Marker for Several Diseases
by Mihai Brinza, Stefan Schröder, Nicolai Ababii, Monja Gronenberg, Thomas Strunskus, Thierry Pauporte, Rainer Adelung, Franz Faupel and Oleg Lupan
Biosensors 2023, 13(5), 538; https://doi.org/10.3390/bios13050538 - 11 May 2023
Cited by 3 | Viewed by 1948
Abstract
Certain molecules act as biomarkers in exhaled breath or outgassing vapors of biological systems. Specifically, ammonia (NH3) can serve as a tracer for food spoilage as well as a breath marker for several diseases. H2 gas in the exhaled breath [...] Read more.
Certain molecules act as biomarkers in exhaled breath or outgassing vapors of biological systems. Specifically, ammonia (NH3) can serve as a tracer for food spoilage as well as a breath marker for several diseases. H2 gas in the exhaled breath can be associated with gastric disorders. This initiates an increasing demand for small and reliable devices with high sensitivity capable of detecting such molecules. Metal-oxide gas sensors present an excellent tradeoff, e.g., compared to expensive and large gas chromatographs for this purpose. However, selective identification of NH3 at the parts-per-million (ppm) level as well as detection of multiple gases in gas mixtures with one sensor remain a challenge. In this work, a new two-in-one sensor for NH3 and H2 detection is presented, which provides stable, precise, and very selective properties for the tracking of these vapors at low concentrations. The fabricated 15 nm TiO2 gas sensors, which were annealed at 610 °C, formed two crystal phases, namely anatase and rutile, and afterwards were covered with a thin 25 nm PV4D4 polymer nanolayer via initiated chemical vapor deposition (iCVD) and showed precise NH3 response at room temperature and exclusive H2 detection at elevated operating temperatures. This enables new possibilities in application fields such as biomedical diagnosis, biosensors, and the development of non-invasive technology. Full article
(This article belongs to the Special Issue Recent Advances in Nanomaterial-Enhanced Gas Sensing)
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16 pages, 3979 KiB  
Article
Sensing Properties of g-C3N4/Au Nanocomposite for Organic Vapor Detection
by Atefeh Nasri, Babak Jaleh, Milad Daneshnazar and Rajender S. Varma
Biosensors 2023, 13(3), 315; https://doi.org/10.3390/bios13030315 - 24 Feb 2023
Cited by 5 | Viewed by 3575
Abstract
Alleviating the increasingly critical environmental pollution problems entails the sensing of volatile organic compounds (VOCs) as a hazardous factor for human health wherein the development of gas sensor platforms offers an efficient strategy to detect such noxious gases. Nanomaterials, particularly carbon-based nanocomposites, are [...] Read more.
Alleviating the increasingly critical environmental pollution problems entails the sensing of volatile organic compounds (VOCs) as a hazardous factor for human health wherein the development of gas sensor platforms offers an efficient strategy to detect such noxious gases. Nanomaterials, particularly carbon-based nanocomposites, are desired sensing compounds for gas detection owing to their unique properties, namely a facile and affordable synthesis process, high surface area, great selectivity, and possibility of working at room temperature. To achieve that objective, g-C3N4 (graphitic carbon nitride) was prepared from urea deploying simple heating. The ensuing porous nanosheets of g-C3N4 were utilized as a substrate for loading Au nanoparticles, which were synthesized by the laser ablation method. g-C3N4 presented a sensing sensitivity toward organic vapors, namely methanol, ethanol, and acetone vapor gases, which were significantly augmented in the presence of Au nanoparticles. Specifically, the as-prepared nanocomposite performed well with regard to the sensing of methanol vapor gas and offers a unique strategy and highly promising sensing compound for electronic and electrochemical applications. Full article
(This article belongs to the Special Issue Recent Advances in Nanomaterial-Enhanced Gas Sensing)
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11 pages, 11137 KiB  
Article
High-Performance Nitric Oxide Gas Sensors Based on an Ultrathin Nanoporous Poly(3-hexylthiophene) Film
by Ganghoon Jeong, Seo Young Shin, Proscovia Kyokunzire, Hyeong Jun Cheon, Eunsol Wi, Minhong Woo and Mincheol Chang
Biosensors 2023, 13(1), 132; https://doi.org/10.3390/bios13010132 - 13 Jan 2023
Cited by 2 | Viewed by 2603
Abstract
Conjugated polymer (CP)-based organic field-effect transistors (OFETs) have been considered a potential sensor platform for detecting gas molecules because they can amplify sensing signals by controlling the gate voltage. However, these sensors exhibit significantly poorer oxidizing gas sensing performance than their inorganic counterparts. [...] Read more.
Conjugated polymer (CP)-based organic field-effect transistors (OFETs) have been considered a potential sensor platform for detecting gas molecules because they can amplify sensing signals by controlling the gate voltage. However, these sensors exhibit significantly poorer oxidizing gas sensing performance than their inorganic counterparts. This paper presents a high-performance nitric oxide (NO) OFET sensor consisting of a poly(3-hexylthiophene) (P3HT) film with an ultrathin nanoporous structure. The ultrathin nonporous structure of the P3HT film was created via deposition through the shear-coating-assisted phase separation of polymer blends and selective solvent etching. The ultrathin nonporous structure of the P3HT film enhanced NO gas diffusion, adsorption, and desorption, resulting in the ultrathin nanoporous P3HT-film-based OFET gas sensor exhibiting significantly better sensing performance than pristine P3HT-film-based OFET sensors. Additionally, upon exposure to 10 ppm NO at room temperature, the nanoporous P3HT-film-based OFET gas sensor exhibited significantly better sensing performance (i.e., responsivity ≈ 42%, sensitivity ≈ 4.7% ppm−1, limit of detection ≈ 0.5 ppm, and response/recovery times ≈ 6.6/8.0 min) than the pristine P3HT-film-based OFET sensors. Full article
(This article belongs to the Special Issue Recent Advances in Nanomaterial-Enhanced Gas Sensing)
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