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Nanomaterials
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Nanoscale Material-Based Gas Sensors
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Nanoscale Material-Based Gas Sensors

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanoelectronics, Nanosensors and Devices".

Deadline for manuscript submissions: 20 August 2024 | Viewed by 1818

Special Issue Editor

Dr. Jingyuan Liu

E-Mail Website
Guest Editor
College of Materials Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China
Interests: nanomaterials; gas sensors; electrochemistry; MXene

Special Issue Information

Dear Colleagues,

Nanomaterials are nano-sized materials with large specific surface areas and special physical, chemical and electrical properties. Gas sensors made of nanomaterials have the advantages of high sensitivity, high selectivity and fast response, and have been widely used in environmental monitoring, medical diagnosis, chemical production and other fields. However, the performance of such sensors is significantly influenced by the morphology and structure of the sensing materials. A wide variety of nanomaterials have been developed to improve gas sensing properties, such as sensitivity, selectivity, stability, and response speed.

This Special Issue aims to cover the recent advances in the design and fabrication of nanomaterial-based gas sensors, focusing on the nanomaterials’ design of current state-of-the-art gas sensors, which have achieved new records in sensitivity, stability, and selectivity. We will highlight the methods of fabrication for these devices and relate their nanomaterials to their record performance to provide a pathway for the gas sensors that will follow. The different types of nanostructured gas sensors, including catalytic, electrochemical, thermally conductive, and optical gas sensors, will be discussed, together with their gas sensing mechanisms and potential applications.

In this Special Issue, original research articles and reviews are welcome. Research areas may include (but not limited to) the following:

  • Nanomaterials’ design of current state-of-the-art gas sensors;
  • The methods of fabrication for gas devices;
  • Gas sensing mechanisms and potential applications.

We look forward to receiving your contributions.

Dr. Jingyuan Liu
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. Nanomaterials 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 2900 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

  • nanomaterials
  • gas sensors
  • nanostructure
  • nanofabrication
  • sensing mechanism
  • sensitivity
  • selectivity
  • nanomaterial synthesis

Published Papers (2 papers)

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Research

18 pages, 4667 KiB  
Article
Hierarchical Nanoheterostructure of HFIP-Grafted α-Fe2O3@Multiwall Carbon Nanotubes as High-Performance Chemiresistive Sensors for Nerve Agents
by Xuechun Wang, Jingyuan Liu, Rumin Li, Jing Yu, Qi Liu, Jiahui Zhu and Peili Liu
Nanomaterials 2024, 14(3), 305; https://doi.org/10.3390/nano14030305 - 02 Feb 2024
Viewed by 696
Abstract
New and efficient sensors of nerve agents are urgently demanded to prevent them from causing mass casualties in war or terrorist attacks. So, in this work, a novel hierarchical nanoheterostructure was synthesized via the direct growth of α-Fe2O3 nanorods onto [...] Read more.
New and efficient sensors of nerve agents are urgently demanded to prevent them from causing mass casualties in war or terrorist attacks. So, in this work, a novel hierarchical nanoheterostructure was synthesized via the direct growth of α-Fe2O3 nanorods onto multiwall carbon nanotube (MWCNT) backbones. Then, the composites were functionalized with hexafluoroisopropanol (HFIP) and successfully applied to detect dimethyl methylphosphonate (DMMP)-sarin simulant gas. The observations show that the HFIP-α-Fe2O3@MWCNT hybrids exhibit outstanding DMMP-sensing performance, including low operating temperature (220 °C), high response (6.0 to 0.1 ppm DMMP), short response/recovery time (8.7 s/11.9 s), as well as low detection limit (63.92 ppb). The analysis of the sensing mechanism demonstrates that the perfect sensing performance is mainly due to the synergistic effect of the chemical interaction of DMMP with the heterostructure and the physical adsorption of DMMP by hydrogen bonds with HFIP that are grafted on the α-Fe2O3@MWCNTs composite. The huge specific surface area of HFIP-α-Fe2O3@MWCNTs composite is also one of the reasons for this enhanced performance. This work not only offers a promising and effective method for synthesizing sensitive materials for high-performance gas sensors but also provides insight into the sensing mechanism of DMMP. Full article
(This article belongs to the Special Issue Nanoscale Material-Based Gas Sensors)
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12 pages, 3522 KiB  
Article
Growth and Characterization of Sputtered InAlN Nanorods on Sapphire Substrates for Acetone Gas Sensing
by Ray-Hua Horng, Po-Hsiang Cho, Jui-Che Chang, Anoop Kumar Singh, Sheng-Yuan Jhang, Po-Liang Liu, Dong-Sing Wuu, Samiran Bairagi, Cheng-Hsu Chen, Kenneth Järrendahl and Ching-Lien Hsiao
Nanomaterials 2024, 14(1), 26; https://doi.org/10.3390/nano14010026 - 21 Dec 2023
Cited by 2 | Viewed by 797
Abstract
The demand for highly sensitive and selective gas sensors has been steadily increasing, driven by applications in various fields such as environmental monitoring, healthcare, and industrial safety. In this context, ternary alloy indium aluminum nitride (InAlN) semiconductors have emerged as a promising material [...] Read more.
The demand for highly sensitive and selective gas sensors has been steadily increasing, driven by applications in various fields such as environmental monitoring, healthcare, and industrial safety. In this context, ternary alloy indium aluminum nitride (InAlN) semiconductors have emerged as a promising material for gas sensing due to their unique properties and tunable material characteristics. This work focuses on the fabrication and characterization of InAlN nanorods grown on sapphire substrates using an ultra-high vacuum magnetron sputter epitaxy with precise control over indium composition and explores their potential for acetone-gas-sensing applications. Various characterization techniques, including XRD, SEM, and TEM, demonstrate the structural and morphological insights of InAlN nanorods, making them suitable for gas-sensing applications. To evaluate the gas-sensing performance of the InAlN nanorods, acetone was chosen as a target analyte due to its relevance in medical diagnostics and industrial processes. The results reveal that the InAlN nanorods exhibit a remarkable sensor response of 2.33% at 600 ppm acetone gas concentration at an operating temperature of 350 °C, with a rapid response time of 18 s. Their high sensor response and rapid response make InAlN a viable candidate for use in medical diagnostics, industrial safety, and environmental monitoring. Full article
(This article belongs to the Special Issue Nanoscale Material-Based Gas Sensors)
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