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Low-Cost Gas Sensors Produced by the Graphite Line-Patterning Technique Applied to Monitoring Banana Ripeness
A low-cost sensor array system for banana ripeness monitoring is presented. The sensors are constructed by employing a graphite line-patterning technique (LPT) to print interdigitated graphite electrodes on tracing paper and then coating the printed area with a thin film of polyaniline (PANI) by in-...
Autores principales: | , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Molecular Diversity Preservation International (MDPI)
2011
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3231435/ https://www.ncbi.nlm.nih.gov/pubmed/22163963 http://dx.doi.org/10.3390/s110606425 |
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author | Manzoli, Alexandra Steffens, Clarice Paschoalin, Rafaella T. Correa, Alessandra A. Alves, William F. Leite, Fábio L. Herrmann, Paulo S. P. |
author_facet | Manzoli, Alexandra Steffens, Clarice Paschoalin, Rafaella T. Correa, Alessandra A. Alves, William F. Leite, Fábio L. Herrmann, Paulo S. P. |
author_sort | Manzoli, Alexandra |
collection | PubMed |
description | A low-cost sensor array system for banana ripeness monitoring is presented. The sensors are constructed by employing a graphite line-patterning technique (LPT) to print interdigitated graphite electrodes on tracing paper and then coating the printed area with a thin film of polyaniline (PANI) by in-situ polymerization as the gas-sensitive layer. The PANI layers were used for the detection of volatile organic compounds (VOCs), including ethylene, emitted during ripening. The influence of the various acid dopants, hydrochloric acid (HCl), methanesulfonic acid (MSA), p-toluenesulfonic acid (TSA) and camphorsulfonic acid (CSA), on the electrical properties of the thin film of PANI adsorbed on the electrodes was also studied. The extent of doping of the films was investigated by UV-Vis absorption spectroscopy and tests showed that the type of dopant plays an important role in the performance of these low-cost sensors. The array of three sensors, without the PANI-HCl sensor, was able to produce a distinct pattern of signals, taken as a signature (fingerprint) that can be used to characterize bananas ripeness. |
format | Online Article Text |
id | pubmed-3231435 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2011 |
publisher | Molecular Diversity Preservation International (MDPI) |
record_format | MEDLINE/PubMed |
spelling | pubmed-32314352011-12-07 Low-Cost Gas Sensors Produced by the Graphite Line-Patterning Technique Applied to Monitoring Banana Ripeness Manzoli, Alexandra Steffens, Clarice Paschoalin, Rafaella T. Correa, Alessandra A. Alves, William F. Leite, Fábio L. Herrmann, Paulo S. P. Sensors (Basel) Article A low-cost sensor array system for banana ripeness monitoring is presented. The sensors are constructed by employing a graphite line-patterning technique (LPT) to print interdigitated graphite electrodes on tracing paper and then coating the printed area with a thin film of polyaniline (PANI) by in-situ polymerization as the gas-sensitive layer. The PANI layers were used for the detection of volatile organic compounds (VOCs), including ethylene, emitted during ripening. The influence of the various acid dopants, hydrochloric acid (HCl), methanesulfonic acid (MSA), p-toluenesulfonic acid (TSA) and camphorsulfonic acid (CSA), on the electrical properties of the thin film of PANI adsorbed on the electrodes was also studied. The extent of doping of the films was investigated by UV-Vis absorption spectroscopy and tests showed that the type of dopant plays an important role in the performance of these low-cost sensors. The array of three sensors, without the PANI-HCl sensor, was able to produce a distinct pattern of signals, taken as a signature (fingerprint) that can be used to characterize bananas ripeness. Molecular Diversity Preservation International (MDPI) 2011-06-17 /pmc/articles/PMC3231435/ /pubmed/22163963 http://dx.doi.org/10.3390/s110606425 Text en © 2011 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 license (http://creativecommons.org/licenses/by/3.0/). |
spellingShingle | Article Manzoli, Alexandra Steffens, Clarice Paschoalin, Rafaella T. Correa, Alessandra A. Alves, William F. Leite, Fábio L. Herrmann, Paulo S. P. Low-Cost Gas Sensors Produced by the Graphite Line-Patterning Technique Applied to Monitoring Banana Ripeness |
title | Low-Cost Gas Sensors Produced by the Graphite Line-Patterning Technique Applied to Monitoring Banana Ripeness |
title_full | Low-Cost Gas Sensors Produced by the Graphite Line-Patterning Technique Applied to Monitoring Banana Ripeness |
title_fullStr | Low-Cost Gas Sensors Produced by the Graphite Line-Patterning Technique Applied to Monitoring Banana Ripeness |
title_full_unstemmed | Low-Cost Gas Sensors Produced by the Graphite Line-Patterning Technique Applied to Monitoring Banana Ripeness |
title_short | Low-Cost Gas Sensors Produced by the Graphite Line-Patterning Technique Applied to Monitoring Banana Ripeness |
title_sort | low-cost gas sensors produced by the graphite line-patterning technique applied to monitoring banana ripeness |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3231435/ https://www.ncbi.nlm.nih.gov/pubmed/22163963 http://dx.doi.org/10.3390/s110606425 |
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