Development and characterization of gas sensors using thin films of polyaniline as active layer
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Matéria (Rio de Janeiro. Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762018000400450 |
Resumo: | ABSTRACT This work aimed at the development and characterization of gas sensing devices using thin films of polyaniline (PAni) as active layer, deposited by in situ polymerization. The polyaniline, an intrinsically conductive polymer, was used due to its high sensitivity to gases, low response time and stability, ease of synthesis and low cost. The sensor was built on a glass fiber reinforced substrate with interdigitated gold electrodes coated with a PAni film layer whose thickness variation was fixed as a function of deposition time. The PAni characterization by Infrared Spectroscopy (FTIR) showed that the exposure to ethanol does not change the chemical structure of PAni. The thickness (3.5 ?m) and morphology of PAni films through Scanning Electron Microscopy (SEM) were compatible to those found in the literature. The electrical resistance of the sensors was evaluated as function of ethanol concentration and varied between 60 kohms for lower ethanol concentrations and 140 kohms for higher concentrations. Nevertheless, a statistical analysis of the measurements in five sensors with different ethanol concentrations demonstrated that the sensors have not been able to differentiate ethanol concentrations to the level of significance of 5%. |
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Development and characterization of gas sensors using thin films of polyaniline as active layergas sensorethanolpolyanilineelectrical conductivityABSTRACT This work aimed at the development and characterization of gas sensing devices using thin films of polyaniline (PAni) as active layer, deposited by in situ polymerization. The polyaniline, an intrinsically conductive polymer, was used due to its high sensitivity to gases, low response time and stability, ease of synthesis and low cost. The sensor was built on a glass fiber reinforced substrate with interdigitated gold electrodes coated with a PAni film layer whose thickness variation was fixed as a function of deposition time. The PAni characterization by Infrared Spectroscopy (FTIR) showed that the exposure to ethanol does not change the chemical structure of PAni. The thickness (3.5 ?m) and morphology of PAni films through Scanning Electron Microscopy (SEM) were compatible to those found in the literature. The electrical resistance of the sensors was evaluated as function of ethanol concentration and varied between 60 kohms for lower ethanol concentrations and 140 kohms for higher concentrations. Nevertheless, a statistical analysis of the measurements in five sensors with different ethanol concentrations demonstrated that the sensors have not been able to differentiate ethanol concentrations to the level of significance of 5%.Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiroem cooperação com a Associação Brasileira do Hidrogênio, ABH22018-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762018000400450Matéria (Rio de Janeiro) v.23 n.4 2018reponame:Matéria (Rio de Janeiro. Online)instname:Matéria (Rio de Janeiro. Online)instacron:RLAM10.1590/s1517-707620180004.0593info:eu-repo/semantics/openAccessWinck,André LuísSantos,João Carlos Vernetti dosLenz,Denise MariaTedesco,Douglas Milaneng2018-12-03T00:00:00Zoai:scielo:S1517-70762018000400450Revistahttp://www.materia.coppe.ufrj.br/https://old.scielo.br/oai/scielo-oai.php||materia@labh2.coppe.ufrj.br1517-70761517-7076opendoar:2018-12-03T00:00Matéria (Rio de Janeiro. Online) - Matéria (Rio de Janeiro. Online)false |
dc.title.none.fl_str_mv |
Development and characterization of gas sensors using thin films of polyaniline as active layer |
title |
Development and characterization of gas sensors using thin films of polyaniline as active layer |
spellingShingle |
Development and characterization of gas sensors using thin films of polyaniline as active layer Winck,André Luís gas sensor ethanol polyaniline electrical conductivity |
title_short |
Development and characterization of gas sensors using thin films of polyaniline as active layer |
title_full |
Development and characterization of gas sensors using thin films of polyaniline as active layer |
title_fullStr |
Development and characterization of gas sensors using thin films of polyaniline as active layer |
title_full_unstemmed |
Development and characterization of gas sensors using thin films of polyaniline as active layer |
title_sort |
Development and characterization of gas sensors using thin films of polyaniline as active layer |
author |
Winck,André Luís |
author_facet |
Winck,André Luís Santos,João Carlos Vernetti dos Lenz,Denise Maria Tedesco,Douglas Milan |
author_role |
author |
author2 |
Santos,João Carlos Vernetti dos Lenz,Denise Maria Tedesco,Douglas Milan |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Winck,André Luís Santos,João Carlos Vernetti dos Lenz,Denise Maria Tedesco,Douglas Milan |
dc.subject.por.fl_str_mv |
gas sensor ethanol polyaniline electrical conductivity |
topic |
gas sensor ethanol polyaniline electrical conductivity |
description |
ABSTRACT This work aimed at the development and characterization of gas sensing devices using thin films of polyaniline (PAni) as active layer, deposited by in situ polymerization. The polyaniline, an intrinsically conductive polymer, was used due to its high sensitivity to gases, low response time and stability, ease of synthesis and low cost. The sensor was built on a glass fiber reinforced substrate with interdigitated gold electrodes coated with a PAni film layer whose thickness variation was fixed as a function of deposition time. The PAni characterization by Infrared Spectroscopy (FTIR) showed that the exposure to ethanol does not change the chemical structure of PAni. The thickness (3.5 ?m) and morphology of PAni films through Scanning Electron Microscopy (SEM) were compatible to those found in the literature. The electrical resistance of the sensors was evaluated as function of ethanol concentration and varied between 60 kohms for lower ethanol concentrations and 140 kohms for higher concentrations. Nevertheless, a statistical analysis of the measurements in five sensors with different ethanol concentrations demonstrated that the sensors have not been able to differentiate ethanol concentrations to the level of significance of 5%. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762018000400450 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1517-70762018000400450 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/s1517-707620180004.0593 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiro em cooperação com a Associação Brasileira do Hidrogênio, ABH2 |
publisher.none.fl_str_mv |
Laboratório de Hidrogênio, Coppe - Universidade Federal do Rio de Janeiro em cooperação com a Associação Brasileira do Hidrogênio, ABH2 |
dc.source.none.fl_str_mv |
Matéria (Rio de Janeiro) v.23 n.4 2018 reponame:Matéria (Rio de Janeiro. Online) instname:Matéria (Rio de Janeiro. Online) instacron:RLAM |
instname_str |
Matéria (Rio de Janeiro. Online) |
instacron_str |
RLAM |
institution |
RLAM |
reponame_str |
Matéria (Rio de Janeiro. Online) |
collection |
Matéria (Rio de Janeiro. Online) |
repository.name.fl_str_mv |
Matéria (Rio de Janeiro. Online) - Matéria (Rio de Janeiro. Online) |
repository.mail.fl_str_mv |
||materia@labh2.coppe.ufrj.br |
_version_ |
1752126691560390656 |