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Chemosensors
Special Issues
Advances in Gas Sensors and their Application
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Advances in Gas Sensors and their Application

A special issue of Chemosensors (ISSN 2227-9040). This special issue belongs to the section "Nanostructures for Chemical Sensing".

Deadline for manuscript submissions: 30 September 2024 | Viewed by 681

Special Issue Editors

Dr. Huayao Li

E-Mail Website
Guest Editor
School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan, China
Interests: gas sensor; electronic nose
Dr. Ji-Wook Yoon

E-Mail Website
Guest Editor
Division of Advanced Materials Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea
Interests: nanostructured gas sensor
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Gas sensors are widely used for many reasons, such as environmental monitoring, toxic gas monitoring, food analysis, exhaled human breath analysis, etc. Many methods have been used to enhance their performance, e.g., doping, nanostructures, heterojunctions, etc. Various novel materials have been adopted, such as CNT, MOF, COF, and MXene, and several new types have recently been invented, including light-activated transducers, field-effect transducers, MEMS, etc. Combining different gas sensors into an array to form an electronic nose enables the differentiation of complex odors.

This Special Issue aims to highlight the recent advances and applications of gas sensors. Therefore, authors are invited to submit work related to novel materials, sensor structures, mechanism studies, and applications. Both review articles and research papers are welcome.

Gas sensors is a classic topic within the scope of Chemosensors. This topic aims to highlight the advances and applications of semiconductor gas sensors, which may be of interest to readers.

Dr. Huayao Li
Dr. Ji-Wook Yoon
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. Chemosensors 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
  • Semiconductor Sensors
  • novel materials, sensor structures, mechanism studies, and applications

Published Papers (1 paper)

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Research

23 pages, 4831 KiB  
Article
Influence of pH on Room-Temperature Synthesis of Zinc Oxide Nanoparticles for Flexible Gas Sensor Applications
by Fazia Mechai, Ahmad Al Shboul, Mohand Outahar Bensidhoum, Hossein Anabestani, Mohsen Ketabi and Ricardo Izquierdo
Chemosensors 2024, 12(5), 83; https://doi.org/10.3390/chemosensors12050083 - 16 May 2024
Viewed by 184
Abstract
This research contributes to work on synthesizing zinc oxide nanoparticles (ZnO NPs) at room temperature (RT) and their utilization in flexible gas sensors. RT ZnO NP synthesis with a basicity solution (pH ≈ 13) demonstrates an efficient method for synthesizing well-crystalline ZnO NPs [...] Read more.
This research contributes to work on synthesizing zinc oxide nanoparticles (ZnO NPs) at room temperature (RT) and their utilization in flexible gas sensors. RT ZnO NP synthesis with a basicity solution (pH ≈ 13) demonstrates an efficient method for synthesizing well-crystalline ZnO NPs (RT.pH13) comparable to those synthesized by the hydrothermal method (hyd.C). The RT.pH13 achieved a high thermal stability with minimal organic reside impurities (~4.2 wt%), 30–80 nm particle size distribution, and a specific surface area (14 m2 g−1). The synthesized pre- and post-calcinated RT.pH13 NPs were then incorporated into flexible sensors for gas sensing applications at ambient conditions (RT and relative humidity of 30–50%). The pre-calcinated ZnO-based sensor (RT.pH13) demonstrated superior sensitivity to styrene and acetic acid and lower sensitivity to dimethyl-6-octenal. The calcinated ZnO-based sensor (RT.pH13.C) exhibited lower sensitivity to styrene and acetic acid, but heightened sensitivity to benzene, acetone, and ethanol. This suggests a correlation between sensitivity and structural transformations following calcination. The investigation of the sensing mechanisms highlighted the role of surface properties in the sensors’ affinity for specific gas molecules and temperature and humidity variations. The study further explored the sensors’ mechanical flexibility, which is crucial for flexible Internet of Things (IoT) applications. Full article
(This article belongs to the Special Issue Advances in Gas Sensors and their Application)
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