Understanding the sensing mechanism of polyaniline resistive sensors. Effect of humidity on sensing of organic volatiles

Autores
Cavallo, Pablo César; Acevedo, Diego Fernando; Fuertes, María Cecilia; Soler Illia, Galo Juan de Avila Arturo; Barbero, César Alfredo
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Polyaniline (PANI) is the oldest and potentially one of the most useful conducting polymers. Among other technological applications, PANI films have been extensively used as resistive sensors of volatile analytes. However, at present the mechanism underlying the resistivity changes of the films upon exposure to volatile substances is still unclear. In this work, we investigate different effects of the volatile absorption which can cause the changes polymer electrical resistance when it acts as resistive sensor. This model takes into account three major components: (i) changes in the electronic structure of the polymeric chains (ΔRele), (ii) variations in the electron hopping process (ΔRhop) and (iii) changes in the ionic conductivity between chains due to changes in the dielectric medium between them (ΔRmed). Using two point probe resistivity, UV-visible spectroscopy, environmental ellipsometric porosimetry and atomic force microscopy we study the effect of volatiles on polyaniline films properties to improve the understanding on the mechanism of resistivity changes. Specifically, in the case of water absorption, the resistivity changes seem to be associated with dielectric medium changes and swelling effects (in the high humidity range). It is found that ambient humidity not only gives a resistive signal but also strongly affect the sensing of other volatiles (e.g. ethanol).
Fil: Cavallo, Pablo César. Universidad Nacional de Río Cuarto; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Acevedo, Diego Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Río Cuarto; Argentina
Fil: Fuertes, María Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Martín; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina
Fil: Soler Illia, Galo Juan de Avila Arturo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Universidad de Buenos Aires; Argentina
Fil: Barbero, César Alfredo. Universidad Nacional de Río Cuarto; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Materia
Humidity
Polyaniline
Resistive Sensor
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/37810
Acceder
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oai_identifier_str oai:ri.conicet.gov.ar:11336/37810
network_acronym_str CONICETDig
repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Understanding the sensing mechanism of polyaniline resistive sensors. Effect of humidity on sensing of organic volatilesCavallo, Pablo CésarAcevedo, Diego FernandoFuertes, María CeciliaSoler Illia, Galo Juan de Avila ArturoBarbero, César AlfredoHumidityPolyanilineResistive Sensorhttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1https://purl.org/becyt/ford/2.5https://purl.org/becyt/ford/2Polyaniline (PANI) is the oldest and potentially one of the most useful conducting polymers. Among other technological applications, PANI films have been extensively used as resistive sensors of volatile analytes. However, at present the mechanism underlying the resistivity changes of the films upon exposure to volatile substances is still unclear. In this work, we investigate different effects of the volatile absorption which can cause the changes polymer electrical resistance when it acts as resistive sensor. This model takes into account three major components: (i) changes in the electronic structure of the polymeric chains (ΔRele), (ii) variations in the electron hopping process (ΔRhop) and (iii) changes in the ionic conductivity between chains due to changes in the dielectric medium between them (ΔRmed). Using two point probe resistivity, UV-visible spectroscopy, environmental ellipsometric porosimetry and atomic force microscopy we study the effect of volatiles on polyaniline films properties to improve the understanding on the mechanism of resistivity changes. Specifically, in the case of water absorption, the resistivity changes seem to be associated with dielectric medium changes and swelling effects (in the high humidity range). It is found that ambient humidity not only gives a resistive signal but also strongly affect the sensing of other volatiles (e.g. ethanol).Fil: Cavallo, Pablo César. Universidad Nacional de Río Cuarto; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Acevedo, Diego Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Río Cuarto; ArgentinaFil: Fuertes, María Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Martín; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; ArgentinaFil: Soler Illia, Galo Juan de Avila Arturo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Universidad de Buenos Aires; ArgentinaFil: Barbero, César Alfredo. Universidad Nacional de Río Cuarto; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaElsevier Science Sa2015-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/37810Cavallo, Pablo César; Acevedo, Diego Fernando; Fuertes, María Cecilia; Soler Illia, Galo Juan de Avila Arturo; Barbero, César Alfredo; Understanding the sensing mechanism of polyaniline resistive sensors. Effect of humidity on sensing of organic volatiles; Elsevier Science Sa; Sensors and Actuators B: Chemical; 210; 1-2015; 574-5800925-4005CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.1016/j.snb.2015.01.029info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0925400515000453info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T10:01:11Zoai:ri.conicet.gov.ar:11336/37810instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 10:01:11.633CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Understanding the sensing mechanism of polyaniline resistive sensors. Effect of humidity on sensing of organic volatiles
title Understanding the sensing mechanism of polyaniline resistive sensors. Effect of humidity on sensing of organic volatiles
spellingShingle Understanding the sensing mechanism of polyaniline resistive sensors. Effect of humidity on sensing of organic volatiles
Cavallo, Pablo César
Humidity
Polyaniline
Resistive Sensor
title_short Understanding the sensing mechanism of polyaniline resistive sensors. Effect of humidity on sensing of organic volatiles
title_full Understanding the sensing mechanism of polyaniline resistive sensors. Effect of humidity on sensing of organic volatiles
title_fullStr Understanding the sensing mechanism of polyaniline resistive sensors. Effect of humidity on sensing of organic volatiles
title_full_unstemmed Understanding the sensing mechanism of polyaniline resistive sensors. Effect of humidity on sensing of organic volatiles
title_sort Understanding the sensing mechanism of polyaniline resistive sensors. Effect of humidity on sensing of organic volatiles
dc.creator.none.fl_str_mv Cavallo, Pablo César
Acevedo, Diego Fernando
Fuertes, María Cecilia
Soler Illia, Galo Juan de Avila Arturo
Barbero, César Alfredo
author Cavallo, Pablo César
author_facet Cavallo, Pablo César
Acevedo, Diego Fernando
Fuertes, María Cecilia
Soler Illia, Galo Juan de Avila Arturo
Barbero, César Alfredo
author_role author
author2 Acevedo, Diego Fernando
Fuertes, María Cecilia
Soler Illia, Galo Juan de Avila Arturo
Barbero, César Alfredo
author2_role author
author
author
author
dc.subject.none.fl_str_mv Humidity
Polyaniline
Resistive Sensor
topic Humidity
Polyaniline
Resistive Sensor
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.4
https://purl.org/becyt/ford/1
https://purl.org/becyt/ford/2.5
https://purl.org/becyt/ford/2
dc.description.none.fl_txt_mv Polyaniline (PANI) is the oldest and potentially one of the most useful conducting polymers. Among other technological applications, PANI films have been extensively used as resistive sensors of volatile analytes. However, at present the mechanism underlying the resistivity changes of the films upon exposure to volatile substances is still unclear. In this work, we investigate different effects of the volatile absorption which can cause the changes polymer electrical resistance when it acts as resistive sensor. This model takes into account three major components: (i) changes in the electronic structure of the polymeric chains (ΔRele), (ii) variations in the electron hopping process (ΔRhop) and (iii) changes in the ionic conductivity between chains due to changes in the dielectric medium between them (ΔRmed). Using two point probe resistivity, UV-visible spectroscopy, environmental ellipsometric porosimetry and atomic force microscopy we study the effect of volatiles on polyaniline films properties to improve the understanding on the mechanism of resistivity changes. Specifically, in the case of water absorption, the resistivity changes seem to be associated with dielectric medium changes and swelling effects (in the high humidity range). It is found that ambient humidity not only gives a resistive signal but also strongly affect the sensing of other volatiles (e.g. ethanol).
Fil: Cavallo, Pablo César. Universidad Nacional de Río Cuarto; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
Fil: Acevedo, Diego Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de Río Cuarto; Argentina
Fil: Fuertes, María Cecilia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Nacional de San Martín; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina
Fil: Soler Illia, Galo Juan de Avila Arturo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Comisión Nacional de Energía Atómica. Centro Atómico Constituyentes; Argentina. Universidad de Buenos Aires; Argentina
Fil: Barbero, César Alfredo. Universidad Nacional de Río Cuarto; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina
description Polyaniline (PANI) is the oldest and potentially one of the most useful conducting polymers. Among other technological applications, PANI films have been extensively used as resistive sensors of volatile analytes. However, at present the mechanism underlying the resistivity changes of the films upon exposure to volatile substances is still unclear. In this work, we investigate different effects of the volatile absorption which can cause the changes polymer electrical resistance when it acts as resistive sensor. This model takes into account three major components: (i) changes in the electronic structure of the polymeric chains (ΔRele), (ii) variations in the electron hopping process (ΔRhop) and (iii) changes in the ionic conductivity between chains due to changes in the dielectric medium between them (ΔRmed). Using two point probe resistivity, UV-visible spectroscopy, environmental ellipsometric porosimetry and atomic force microscopy we study the effect of volatiles on polyaniline films properties to improve the understanding on the mechanism of resistivity changes. Specifically, in the case of water absorption, the resistivity changes seem to be associated with dielectric medium changes and swelling effects (in the high humidity range). It is found that ambient humidity not only gives a resistive signal but also strongly affect the sensing of other volatiles (e.g. ethanol).
publishDate 2015
dc.date.none.fl_str_mv 2015-01
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/37810
Cavallo, Pablo César; Acevedo, Diego Fernando; Fuertes, María Cecilia; Soler Illia, Galo Juan de Avila Arturo; Barbero, César Alfredo; Understanding the sensing mechanism of polyaniline resistive sensors. Effect of humidity on sensing of organic volatiles; Elsevier Science Sa; Sensors and Actuators B: Chemical; 210; 1-2015; 574-580
0925-4005
CONICET Digital
CONICET
url http://hdl.handle.net/11336/37810
identifier_str_mv Cavallo, Pablo César; Acevedo, Diego Fernando; Fuertes, María Cecilia; Soler Illia, Galo Juan de Avila Arturo; Barbero, César Alfredo; Understanding the sensing mechanism of polyaniline resistive sensors. Effect of humidity on sensing of organic volatiles; Elsevier Science Sa; Sensors and Actuators B: Chemical; 210; 1-2015; 574-580
0925-4005
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/doi/10.1016/j.snb.2015.01.029
info:eu-repo/semantics/altIdentifier/url/https://www.sciencedirect.com/science/article/pii/S0925400515000453
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Elsevier Science Sa
publisher.none.fl_str_mv Elsevier Science Sa
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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