Cargando…

Fabrication and Characterization of Humidity Sensors Based on Graphene Oxide–PEDOT:PSS Composites on a Flexible Substrate

In this paper, we present a simple, fast, and cost-effective method for the large-scale fabrication of high-sensitivity humidity sensors on flexible substrates. These sensors consist of a micro screen-printed capacitive structure upon which a sensitive layer is deposited. We studied two different st...

Descripción completa

Detalles Bibliográficos
Autores principales: Romero, Francisco J., Rivadeneyra, Almudena, Becherer, Markus, Morales, Diego P., Rodríguez, Noel
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7074611/
https://www.ncbi.nlm.nih.gov/pubmed/32013153
http://dx.doi.org/10.3390/mi11020148
_version_ 1783506873632161792
author Romero, Francisco J.
Rivadeneyra, Almudena
Becherer, Markus
Morales, Diego P.
Rodríguez, Noel
author_facet Romero, Francisco J.
Rivadeneyra, Almudena
Becherer, Markus
Morales, Diego P.
Rodríguez, Noel
author_sort Romero, Francisco J.
collection PubMed
description In this paper, we present a simple, fast, and cost-effective method for the large-scale fabrication of high-sensitivity humidity sensors on flexible substrates. These sensors consist of a micro screen-printed capacitive structure upon which a sensitive layer is deposited. We studied two different structures and three different sensing materials by modifying the concentration of poly(3,4-ethylenedioxythiophene)/polystyrene sulfonate (PEDOT:PSS) in a graphene oxide (GO) solution. The results show that the aggregation of the PEDOT:PSS to the GO can modify its electrical properties, boosting the performance of the capacitive sensors in terms of both resistive losses and sensitivity to relative humidity (RH) changes. Thus, in an area less than 30 mm(2), the GO/PEDOT:PSS-based sensors can achieve a sensitivity much higher (1.22 nF/%RH at 1 kHz) than other similar sensors presented in the literature which, together with their good thermal stability, time response, and performance over bending, demonstrates that the manufacturing approach described in this work paves the way for the mass production of flexible humidity sensors in an inexpensive way.
format Online
Article
Text
id pubmed-7074611
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher MDPI
record_format MEDLINE/PubMed
spelling pubmed-70746112020-03-20 Fabrication and Characterization of Humidity Sensors Based on Graphene Oxide–PEDOT:PSS Composites on a Flexible Substrate Romero, Francisco J. Rivadeneyra, Almudena Becherer, Markus Morales, Diego P. Rodríguez, Noel Micromachines (Basel) Article In this paper, we present a simple, fast, and cost-effective method for the large-scale fabrication of high-sensitivity humidity sensors on flexible substrates. These sensors consist of a micro screen-printed capacitive structure upon which a sensitive layer is deposited. We studied two different structures and three different sensing materials by modifying the concentration of poly(3,4-ethylenedioxythiophene)/polystyrene sulfonate (PEDOT:PSS) in a graphene oxide (GO) solution. The results show that the aggregation of the PEDOT:PSS to the GO can modify its electrical properties, boosting the performance of the capacitive sensors in terms of both resistive losses and sensitivity to relative humidity (RH) changes. Thus, in an area less than 30 mm(2), the GO/PEDOT:PSS-based sensors can achieve a sensitivity much higher (1.22 nF/%RH at 1 kHz) than other similar sensors presented in the literature which, together with their good thermal stability, time response, and performance over bending, demonstrates that the manufacturing approach described in this work paves the way for the mass production of flexible humidity sensors in an inexpensive way. MDPI 2020-01-29 /pmc/articles/PMC7074611/ /pubmed/32013153 http://dx.doi.org/10.3390/mi11020148 Text en © 2020 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
Romero, Francisco J.
Rivadeneyra, Almudena
Becherer, Markus
Morales, Diego P.
Rodríguez, Noel
Fabrication and Characterization of Humidity Sensors Based on Graphene Oxide–PEDOT:PSS Composites on a Flexible Substrate
title Fabrication and Characterization of Humidity Sensors Based on Graphene Oxide–PEDOT:PSS Composites on a Flexible Substrate
title_full Fabrication and Characterization of Humidity Sensors Based on Graphene Oxide–PEDOT:PSS Composites on a Flexible Substrate
title_fullStr Fabrication and Characterization of Humidity Sensors Based on Graphene Oxide–PEDOT:PSS Composites on a Flexible Substrate
title_full_unstemmed Fabrication and Characterization of Humidity Sensors Based on Graphene Oxide–PEDOT:PSS Composites on a Flexible Substrate
title_short Fabrication and Characterization of Humidity Sensors Based on Graphene Oxide–PEDOT:PSS Composites on a Flexible Substrate
title_sort fabrication and characterization of humidity sensors based on graphene oxide–pedot:pss composites on a flexible substrate
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7074611/
https://www.ncbi.nlm.nih.gov/pubmed/32013153
http://dx.doi.org/10.3390/mi11020148
work_keys_str_mv AT romerofranciscoj fabricationandcharacterizationofhumiditysensorsbasedongrapheneoxidepedotpsscompositesonaflexiblesubstrate
AT rivadeneyraalmudena fabricationandcharacterizationofhumiditysensorsbasedongrapheneoxidepedotpsscompositesonaflexiblesubstrate
AT becherermarkus fabricationandcharacterizationofhumiditysensorsbasedongrapheneoxidepedotpsscompositesonaflexiblesubstrate
AT moralesdiegop fabricationandcharacterizationofhumiditysensorsbasedongrapheneoxidepedotpsscompositesonaflexiblesubstrate
AT rodrigueznoel fabricationandcharacterizationofhumiditysensorsbasedongrapheneoxidepedotpsscompositesonaflexiblesubstrate