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Applications of Nanocomposites in Gas Sensors

A special issue of International Journal of Molecular Sciences (ISSN 1422-0067). This special issue belongs to the section "Molecular Nanoscience".

Deadline for manuscript submissions: 20 March 2025 | Viewed by 2197

Special Issue Editor


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Guest Editor
Laboratory of Chemistry and Physics of Semiconductor and Sensor Materials, Department of Chemistry, Lomonosov Moscow State University, 119234 Moscow, Russia
Interests: gas sensor; metal oxide; semiconductor; solid-state chemistry

Special Issue Information

Dear Colleagues,

The use of nanocomposites in the field of chemical gas sensors allowed scholars to demonstrate the dramatic improvements of the performance of various types of sensors, such as metal oxide, polymeric, carbon-based, electrochemical and others. Apart from quantitative effects, some new phenomena have been shown, for example, in the case of composite systems with hetero- and homo-junctions. The purpose of the present Special Issue is to collect the papers that demonstrate the innovation of the design and architecture of gas-sensing nanocomposite systems and the methods of  obtaining them, as well as addressing unresolved questions such as the synergistic effects of such systems, their evolution during operation and their long-term stability. In addition to the original research articles and review papers, summaries of the current body of knowledge in the field of gas-sensing nanocomposite systems and new insights into future research are welcome in the upcoming open access Special Issue.

Topics include, but are not limited to:

  • Metal oxide nanocomposite systems for gas sensing;
  • Organic–inorganic composites and nanohybrid systems;
  • Carbon-based nanocomposites for gas sensors;
  • New modeling approaches for gas-sensing nanocomposites.

Dr. Valeriy Krivetskiy
Guest Editor

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Keywords

  • nanocomposite
  • gas sensor
  • nano architecture
  • solid state

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Published Papers (1 paper)

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Research

13 pages, 3243 KiB  
Article
Investigation of Laser-Induced Graphene (LIG) on a Flexible Substrate and Its Functionalization by Metal Doping for Gas-Sensing Applications
by Dongwook Kwak, Hyojin Kim, Seunghun Jang, Byoung Gak Kim, Donghwi Cho, Hyunju Chang and Jeong-O Lee
Int. J. Mol. Sci. 2024, 25(2), 1172; https://doi.org/10.3390/ijms25021172 - 18 Jan 2024
Cited by 3 | Viewed by 1684
Abstract
Graphene materials synthesized using direct laser writing (laser-induced graphene; LIG) make favorable sensor materials because of their large surface area, ease of fabrication, and cost-effectiveness. In particular, LIG decorated with metal nanoparticles (NPs) has been used in various sensors, including chemical sensors and [...] Read more.
Graphene materials synthesized using direct laser writing (laser-induced graphene; LIG) make favorable sensor materials because of their large surface area, ease of fabrication, and cost-effectiveness. In particular, LIG decorated with metal nanoparticles (NPs) has been used in various sensors, including chemical sensors and electronic and electrochemical biosensors. However, the effect of metal decoration on LIG sensors remains controversial; hypotheses based on computational simulations do not always match the experimental results, and even the experimental results reported by different researchers have not been consistent. In the present study, we explored the effects of metal decorations on LIG gas sensors, with NO2 and NH3 gases as the representative oxidizing and reducing agents, respectively. To eliminate the unwanted side effects arising from metal salt residues, metal NPs were directly deposited via vacuum evaporation. Although the gas sensitivities of the sensors deteriorate upon metal decoration irrespective of the metal work function, in the case of NO2 gas, they improve upon metal decoration in the case of NH3 exposure. A careful investigation of the chemical structure and morphology of the metal NPs in the LIG sensors shows that the spontaneous oxidation of metal NPs with a low work function changes the behavior of the LIG gas sensors and that the sensors’ behaviors under NO2 and NH3 gases follow different principles. Full article
(This article belongs to the Special Issue Applications of Nanocomposites in Gas Sensors)
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