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Gas Sensors and Electronic Noses for the Real Condition Sensing

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A special issue of Chemosensors (ISSN 2227-9040). This special issue belongs to the section "Applied Chemical Sensors".

Deadline for manuscript submissions: 30 September 2024 | Viewed by 6293

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Special Issue Editors

Dr. Tao Liu

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Guest Editor

School of Microelectronics and Communication Engineering, Chongqing University, Chongqing 400044, China
Interests: machine olfaction; active learning; transfer learning and signal processing

Prof. Dr. Ping Wang

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Guest Editor

Biosensor National Special Laboratory, Department of Biomedical Engineering, Yuquan Campus, Zhouyiqing Building, Zhejiang University, Hangzhou 310027, China
Interests: biosensors and bioelectronics; electronic nose and electronic tongue; cell-based biosensors (cbbs) and organoid chips; bio-mems and bio-nems; biomimetic sensors
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Electronic noses with chemical gas sensors represent an important approach for the identification of volatile organic compounds. Previous electronic nose systems have been used in a range of successful qualitative and quantitative gas-phase analyses in laboratories. The next great challenge facing gas sensors and electronic noses is their implementation under real conditions. Therefore, the gas sensors for electronic noses should have improved physical and chemical properties of power consumption, reproducibility, selectivity, etc. New system structures should be focused on balancing the performance, volume, and weight of electronic noses. Cutting-edge machine learning models should be considered for complex and difficult scenarios.

This Special Issue aims to highlight the latest research activities in the field of gas sensors and electronic noses in real conditions and their applications. Topics of interest include but are not limited to following areas:

Material, structure, and fabrication for long-term-use chemical gas sensors;
Miniaturized gas injection systems for electronic noses;
Machine learning models for electronic noses for automatic calibration, online consecutive recognition, and other complex environments.

An electronic nose is an applied system based on chemical gas sensors. Research on electronic noses is firmly within the scope of Chemosensors. For this Special Issue, topics of interest also cover chemical sensors and associated applications, which also fit exactly with the scope of Chemosensors.

Both review articles and original research papers are welcome.

Dr. Tao Liu
Prof. Dr. Ping Wang
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

electronic nose
gas sensor
machine learning
gas sensing
cognitive intelligence

Published Papers (4 papers)

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Research

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14 pages, 14107 KiB

Open AccessArticle

Heater Topology Influence on the Functional Characteristics of Thin-Film Gas Sensors Made by MEMS-Silicon Technology

by Gennady Gorokh, Igor Taratyn, Uladzimir Fiadosenka, Olga Reutskaya and Andrei Lozovenko

Chemosensors 2023, 11(8), 443; https://doi.org/10.3390/chemosensors11080443 - 09 Aug 2023

Cited by 3 | Viewed by 872

Abstract

The design of the heater plays a decisive role in the energy consumption, sensitivity, and speed of chemical sensors. The paper analyzes various options for the topology of meander-type platinum heaters in chemical sensors fabricated on thin dielectric membranes using MEMS-silicon technology. Comprehensive studies of the heater’s current–voltage characteristics have been carried out, heating rates have been measured at various currents, experimental temperature characteristics for various meander topologies have been obtained, heater options have been determined, and optimal heat transfer processes are ensured at a low power consumption of about 20–25 mW. Sensors with an optimal heater topology based on a double dielectric membrane were fabricated according to the described technological process, and sensory responses to 0.5 vol.% CH₄ and 0.2% C₃H₈ were studied. The obtained results showed good results and confirmed the need to choose the optimal heater topology when designing sensors for recording the given type of gas mixtures in a certain temperature range. Full article

(This article belongs to the Special Issue Gas Sensors and Electronic Noses for the Real Condition Sensing)

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14 pages, 10865 KiB

Open AccessArticle

Formaldehyde Gas Sensing Characteristics of ZnO-TiO₂ Gas Sensors

by Jaebum Park, Jihoon Lee, Myung Sik Choi and Jeung-Soo Huh

Chemosensors 2023, 11(2), 140; https://doi.org/10.3390/chemosensors11020140 - 14 Feb 2023

Cited by 3 | Viewed by 1613

Abstract

Since the increase in the emission of various Volatiles Organic Compounds, gas and formaldehyde gas have had a harmful effect on the human body, and gas sensors that can measure those gases were fabricated in this study. After Pt coating was performed on the alumina substrate, Zn seed layers were fabricated. Nanostructures were formed through sonochemical synthesis by varying the ratio of ZnO and TiO₂. Thereafter, the reactivity and recovery properties were compared and evaluated according to the concentrations of formaldehyde and toluene gas. The ZnO(99%)-TiO₂(1%) gas sensor showed meaningful selectivity of about 40% or more at a concentration ranging from 5 to 20 ppm (high concentration) of formaldehyde and toluene gas, and showed a low selectivity of about 5% or more for a concentration ranging from 0.1 to 1 ppm (low concentration) of formaldehyde and toluene gas. This sensor can be optimized to have a meaningful selectivity of formaldehyde gas compared to other Volatiles Organic Compounds gases by optimizing the ZnO-TiO₂ nanostructure. Full article

(This article belongs to the Special Issue Gas Sensors and Electronic Noses for the Real Condition Sensing)

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Review

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26 pages, 7253 KiB

Open AccessReview

Design of Functional Ti₃C₂T_x MXene for Gas Sensors and Energy Harvesting: A Review

by Qui Thanh Hoai Ta, Deepika Thakur and Jin-Seo Noh

Chemosensors 2023, 11(9), 477; https://doi.org/10.3390/chemosensors11090477 - 01 Sep 2023

Cited by 1 | Viewed by 1683

Abstract

Two-dimensional (2D) inorganic compounds, MXenes, are the most promising candidate for chemical sensors and environmental remediation. Since the first synthesis of Ti₃C₂T_x MXene from the Ti₃AlC₂ MAX phase in 2011, 2D materials have been attracting significant attention from a wide range of scientific communities because of their unique physicochemical properties. The attractive properties of MXenes motivated us to explore the new wave of front-end research and applications. Over the past 12 years, there have been more than 10,000 theoretical and experimental studies on MXenes. All these publications have primarily focused on Ti₃C₂T_x MXene because of its fascinating material properties and tunability towards target applications. To provide readers with a fundamental understanding of this emerging 2D material, this review discusses the recent trends in the design of Ti₃C₂T_x MXene for gas sensors and energy harvesting applications. For the most updated information, this review focuses on important findings and applications reported in the last decade. Full article

(This article belongs to the Special Issue Gas Sensors and Electronic Noses for the Real Condition Sensing)

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22 pages, 8380 KiB

Open AccessReview

Room Temperature Resistive Hydrogen Sensor for Early Safety Warning of Li-Ion Batteries

by Sixun Li, Shiyu Zhou, Shuaiyin Zhao, Tengfei Jin, Maohua Zhong, Zhuhao Cen, Peirong Gao, Wenjun Yan and Min Ling

Chemosensors 2023, 11(6), 344; https://doi.org/10.3390/chemosensors11060344 - 12 Jun 2023

Cited by 1 | Viewed by 1915

Abstract

Lithium-ion batteries (LIBs) have become one of the most competitive energy storage technologies. However, the “thermal runaway” of LIBs leads to serious safety issues. Early safety warning of LIBs is a prerequisite for the widely applications of power battery and large-scale energy storage systems. As reported, hydrogen (H₂) could be generated due to the reaction of lithium metal and polymers inside the battery. The generation of H₂ is some time earlier than the “thermal runaway”. Therefore, the rapid detection of trace hydrogen is the most effective method for early safety warning of LIBs. Resistive hydrogen sensors have attracted attention in recent years. In addition, they could be placed inside the LIB package for the initial hydrogen detection. Here, we overview the recent key advances of resistive room temperature (RT) H₂ sensors, and explore possible applications inside LIB. We explored the underlying sensing mechanisms for each type of H₂ sensor. Additionally, we highlight the approaches to develop the H₂ sensors in large scale. Finally, the present review presents a brief conclusion and perspectives about the resistive RT H₂ sensors for early safety warning of LIBs. Full article

(This article belongs to the Special Issue Gas Sensors and Electronic Noses for the Real Condition Sensing)

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