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A Gas Sensor Based on a Single SnO Micro-Disk
In this study, individual nanofabricated SnO micro-disks, previously shown to exhibit exceptional sensitivity to NO(x), are investigated to further our understanding of gas sensing mechanisms. The SnO disks presenting different areas and thickness were isolated and electrically connected to metallic...
Autores principales: | , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6210233/ https://www.ncbi.nlm.nih.gov/pubmed/30257516 http://dx.doi.org/10.3390/s18103229 |
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author | Masteghin, Mateus G. Orlandi, Marcelo O. |
author_facet | Masteghin, Mateus G. Orlandi, Marcelo O. |
author_sort | Masteghin, Mateus G. |
collection | PubMed |
description | In this study, individual nanofabricated SnO micro-disks, previously shown to exhibit exceptional sensitivity to NO(x), are investigated to further our understanding of gas sensing mechanisms. The SnO disks presenting different areas and thickness were isolated and electrically connected to metallic electrodes aided by a Dual Beam Microscope (SEM/FIB). While single micro-disk devices were found to exhibit short response and recovery times and low power consumption, large interconnected arrays of micro-disks exhibit much higher sensitivity and selectivity. The source of these differences is discussed based on the gas/solid interaction and transport mechanisms, which showed that thickness plays a major role during the gas sensing of single-devices. The calculated Debye length of the SnO disk in presence of NO(2) is reported for the first time. |
format | Online Article Text |
id | pubmed-6210233 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-62102332018-11-02 A Gas Sensor Based on a Single SnO Micro-Disk Masteghin, Mateus G. Orlandi, Marcelo O. Sensors (Basel) Article In this study, individual nanofabricated SnO micro-disks, previously shown to exhibit exceptional sensitivity to NO(x), are investigated to further our understanding of gas sensing mechanisms. The SnO disks presenting different areas and thickness were isolated and electrically connected to metallic electrodes aided by a Dual Beam Microscope (SEM/FIB). While single micro-disk devices were found to exhibit short response and recovery times and low power consumption, large interconnected arrays of micro-disks exhibit much higher sensitivity and selectivity. The source of these differences is discussed based on the gas/solid interaction and transport mechanisms, which showed that thickness plays a major role during the gas sensing of single-devices. The calculated Debye length of the SnO disk in presence of NO(2) is reported for the first time. MDPI 2018-09-25 /pmc/articles/PMC6210233/ /pubmed/30257516 http://dx.doi.org/10.3390/s18103229 Text en © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Masteghin, Mateus G. Orlandi, Marcelo O. A Gas Sensor Based on a Single SnO Micro-Disk |
title | A Gas Sensor Based on a Single SnO Micro-Disk |
title_full | A Gas Sensor Based on a Single SnO Micro-Disk |
title_fullStr | A Gas Sensor Based on a Single SnO Micro-Disk |
title_full_unstemmed | A Gas Sensor Based on a Single SnO Micro-Disk |
title_short | A Gas Sensor Based on a Single SnO Micro-Disk |
title_sort | gas sensor based on a single sno micro-disk |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6210233/ https://www.ncbi.nlm.nih.gov/pubmed/30257516 http://dx.doi.org/10.3390/s18103229 |
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