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Chemosensors
Special Issues
Gas Sensors: Current Status and Future Perspectives
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Gas Sensors: Current Status and Future Perspectives

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

Deadline for manuscript submissions: closed (31 December 2024) | Viewed by 2443

Special Issue Editors

Dr. Izabela Constantinoiu

E-Mail Website
Guest Editor
Laser Department, National Institute of Laser, Plasma and Radiation Physics, 077125 Magurele, Romania
Interests: nanostructured materials; hydrogen sensors; surface acoustic wave sensors; pulsed laser deposition
Dr. Cristian Viespe

E-Mail Website
Guest Editor
Laser Department, National Institute of Laser, Plasma and Radiation Physics, 077125 Magurele, Romania
Interests: surface acoustic wave sensors; hydrogen sensors; thin films; pulsed laser deposition; nanomaterials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Most industries pay significant attention to the development of the security of their activities. Therefore, the development of sensors with high sensitivity and a low limit of detection is needed. There is a wide variety of gas sensors available, including resistive sensors, surface acoustic wave sensors, optoelectronic sensors, conductometric sensors and many others. The diversity of sensitive materials used is high, but obtaining selectivity for certain gases is still a challenge. Moreover, wireless operation and the facilitation of electronic advantages for sensor devices are current topics of interest in the field of hydrogen sensors.

In this Special Issue, we collated studies showing the remarkable results of all types of gas sensors, as well as works that review the various studies conducted and their results, and offer perspectives for the future.

We invite you to outline the current situation of gas sensors and we look forward to receiving your research papers, reviews of the state of the art in this field, or short communications.

Dr. Izabela Constantinoiu
Dr. Cristian Viespe
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
  • resistive sensors
  • surface acoustic wave sensors
  • optoelectronic sensors
  • conductometric sensors
  • nanostructured materials
  • chemosensors
  • nanosensors
  • nanomaterials

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Published Papers (1 paper)

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Research

13 pages, 5508 KiB  
Article
High-Sensitivity H2 and CH4 SAW Sensors with Carbon Nanowalls and Improvement in Their Performance after Plasma Treatment
by Sorin Vizireanu, Izabela Constantinoiu, Veronica Satulu, Silviu Daniel Stoica and Cristian Viespe
Chemosensors 2023, 11(11), 566; https://doi.org/10.3390/chemosensors11110566 - 16 Nov 2023
Cited by 5 | Viewed by 1857
Abstract
We have developed surface acoustic wave (SAW) sensors with high sensitivity and a reversible response at room temperature (RT). The sensitive area of the sensor was prepared from vertically aligned graphene sheets, like carbon nanowalls (CNWs), which were deposited onto the quartz SAW [...] Read more.
We have developed surface acoustic wave (SAW) sensors with high sensitivity and a reversible response at room temperature (RT). The sensitive area of the sensor was prepared from vertically aligned graphene sheets, like carbon nanowalls (CNWs), which were deposited onto the quartz SAW sensor substrate. The CNWs were obtained by RF plasma-enhanced chemical vapor deposition (PECVD) at 600 °C, and their sensitivity was subsequently enhanced through hydrogen plasma treatment. The SAW sensors were tested at H2 and CH4 at RT, and they exhibited a reversible response for both gases at concentrations between 0.02% and 0.1%, with a detection limit of a few ppm. The additional hydrogen plasma treatment preserved the lamellar structure, with slight modifications to the morphology of CNW edges, as observed by scanning electron microscopy (SEM). X-ray photoelectron spectroscopy (XPS) investigations revealed the presence of new functional groups, a significant number of defects and electron transitions after the treatment. Changes in the chemical state on the CNW surface are most probably responsible for the improved gas adsorption after plasma treatment. These results identify CNWs as a promising material for designing new SAW sensors, with the possibility of using plasma treatments to enhance the detection limit below the ppm level. Full article
(This article belongs to the Special Issue Gas Sensors: Current Status and Future Perspectives)
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