Screen-printed, flexible, and eco-friendly thermoelectric touch sensors based on ethyl cellulose and graphite flakes inks
Autor(a) principal: | |
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Data de Publicação: | 2023 |
Outros Autores: | , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | https://hdl.handle.net/1822/89499 |
Resumo: | Despite the undoubtable interest in energy conversion, thermoelectric (TE) materials can be approached from a temperature-sensitive perspective, as they can detect small thermal stimuli, such as a human touch or contact with cold/hot objects. This feature offers possibilities for different applications one of them being the integration with scalable and cost-effective, biocompatible, flexible, and lightweight thermal sensing solutions, exploring the combination of sustainable Seebeck coefficient-holding materials with printing techniques and flexible substrates. In this work, ethyl cellulose and graphite flakes inks were optimized to be used as functional material for flexible thermal touch sensors produced by screen-printing. Graphite concentrations of 10, 20 and 30 wt% were tested, with 1, 2 and 3 printed layers on four different substrates—office paper, sticker label paper, standard cotton, and organic cotton. The conjugation of these variables was assessed in terms of printability, sheet resistance and TE response. The best electrical-TE output combination is achieved by printing two layers of the ink with 20 wt% of graphite on an office paper substrate. Subsequently, thermal touch sensors with up to 48 TE elements were produced to increase the output voltage response (>4.5 mV) promoted by a gloved finger touch. Fast and repeatable touch recognition were obtained in optimized devices with a signal-to-noise ratio up to 340 and rise times bellow 0.5 s. The results evidence that the screen-printed graphite-based inks are highly suitable for flexible TE sensing applications. |
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Screen-printed, flexible, and eco-friendly thermoelectric touch sensors based on ethyl cellulose and graphite flakes inksThermoelectricTouch sensorsEthyl celluloseGraphiteFlexible substrateScreen-printingflexible substratesEngenharia e Tecnologia::Outras Engenharias e TecnologiasScience & TechnologyDespite the undoubtable interest in energy conversion, thermoelectric (TE) materials can be approached from a temperature-sensitive perspective, as they can detect small thermal stimuli, such as a human touch or contact with cold/hot objects. This feature offers possibilities for different applications one of them being the integration with scalable and cost-effective, biocompatible, flexible, and lightweight thermal sensing solutions, exploring the combination of sustainable Seebeck coefficient-holding materials with printing techniques and flexible substrates. In this work, ethyl cellulose and graphite flakes inks were optimized to be used as functional material for flexible thermal touch sensors produced by screen-printing. Graphite concentrations of 10, 20 and 30 wt% were tested, with 1, 2 and 3 printed layers on four different substrates—office paper, sticker label paper, standard cotton, and organic cotton. The conjugation of these variables was assessed in terms of printability, sheet resistance and TE response. The best electrical-TE output combination is achieved by printing two layers of the ink with 20 wt% of graphite on an office paper substrate. Subsequently, thermal touch sensors with up to 48 TE elements were produced to increase the output voltage response (>4.5 mV) promoted by a gloved finger touch. Fast and repeatable touch recognition were obtained in optimized devices with a signal-to-noise ratio up to 340 and rise times bellow 0.5 s. The results evidence that the screen-printed graphite-based inks are highly suitable for flexible TE sensing applications.This work was financed by national funds from FCT—Fundação para a Ciência e a Tecnologia, I P, in the scope of the projects LA/P/0037/2020, UIDP/50025/2020, and UIDB/50025/2020 of the As-sociate Laboratory Institute of Nanostructures, Nanomodelling and Nanofabrication—i3N, and by projects PTDC/NAN-MAT/32558/2017 and PTDC/CTM-PAM/4241/2020. E V thanks the FCT— Fundação para a Ciência e a Tecnologia, I P, under the national support to R&D units Grant, through the reference project UIDB/04436/2020 and UIDP/04436/2020. J F and J T C thank the support from FCT— Fundação para a Ciência e a Tecnologia, I P through the PhD scholarships SFRH/BD/121679/2016 and SFRH/BD/139225/2018, respectively. This work has received funding from the European Union Horizon 2020 Research and Innovation Programme under the Grant Agreements Nos: 640598 (ERC-2014-STG NEW-FUN), 952169 (SYNERGY, H2020-WIDESPREAD-2020-5, CSA), and 101008701 (EMERGE, H2020-INFRAIA-2020-1).IOP PublishingUniversidade do MinhoFigueira, J.Bonito, R. M.Carvalho, J. T.Vieira, E. M. FGaspar, C.Loureiro, JoanaCorreia, J. H.Fortunato, E.Martins, R.Pereira, L.20232023-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/89499eng2058-85852058-858510.1088/2058-8585/acc114025001https://iopscience.iop.org/article/10.1088/2058-8585/acc114info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-03-16T01:22:26Zoai:repositorium.sdum.uminho.pt:1822/89499Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T04:01:13.556103Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Screen-printed, flexible, and eco-friendly thermoelectric touch sensors based on ethyl cellulose and graphite flakes inks |
title |
Screen-printed, flexible, and eco-friendly thermoelectric touch sensors based on ethyl cellulose and graphite flakes inks |
spellingShingle |
Screen-printed, flexible, and eco-friendly thermoelectric touch sensors based on ethyl cellulose and graphite flakes inks Figueira, J. Thermoelectric Touch sensors Ethyl cellulose Graphite Flexible substrate Screen-printing flexible substrates Engenharia e Tecnologia::Outras Engenharias e Tecnologias Science & Technology |
title_short |
Screen-printed, flexible, and eco-friendly thermoelectric touch sensors based on ethyl cellulose and graphite flakes inks |
title_full |
Screen-printed, flexible, and eco-friendly thermoelectric touch sensors based on ethyl cellulose and graphite flakes inks |
title_fullStr |
Screen-printed, flexible, and eco-friendly thermoelectric touch sensors based on ethyl cellulose and graphite flakes inks |
title_full_unstemmed |
Screen-printed, flexible, and eco-friendly thermoelectric touch sensors based on ethyl cellulose and graphite flakes inks |
title_sort |
Screen-printed, flexible, and eco-friendly thermoelectric touch sensors based on ethyl cellulose and graphite flakes inks |
author |
Figueira, J. |
author_facet |
Figueira, J. Bonito, R. M. Carvalho, J. T. Vieira, E. M. F Gaspar, C. Loureiro, Joana Correia, J. H. Fortunato, E. Martins, R. Pereira, L. |
author_role |
author |
author2 |
Bonito, R. M. Carvalho, J. T. Vieira, E. M. F Gaspar, C. Loureiro, Joana Correia, J. H. Fortunato, E. Martins, R. Pereira, L. |
author2_role |
author author author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Figueira, J. Bonito, R. M. Carvalho, J. T. Vieira, E. M. F Gaspar, C. Loureiro, Joana Correia, J. H. Fortunato, E. Martins, R. Pereira, L. |
dc.subject.por.fl_str_mv |
Thermoelectric Touch sensors Ethyl cellulose Graphite Flexible substrate Screen-printing flexible substrates Engenharia e Tecnologia::Outras Engenharias e Tecnologias Science & Technology |
topic |
Thermoelectric Touch sensors Ethyl cellulose Graphite Flexible substrate Screen-printing flexible substrates Engenharia e Tecnologia::Outras Engenharias e Tecnologias Science & Technology |
description |
Despite the undoubtable interest in energy conversion, thermoelectric (TE) materials can be approached from a temperature-sensitive perspective, as they can detect small thermal stimuli, such as a human touch or contact with cold/hot objects. This feature offers possibilities for different applications one of them being the integration with scalable and cost-effective, biocompatible, flexible, and lightweight thermal sensing solutions, exploring the combination of sustainable Seebeck coefficient-holding materials with printing techniques and flexible substrates. In this work, ethyl cellulose and graphite flakes inks were optimized to be used as functional material for flexible thermal touch sensors produced by screen-printing. Graphite concentrations of 10, 20 and 30 wt% were tested, with 1, 2 and 3 printed layers on four different substrates—office paper, sticker label paper, standard cotton, and organic cotton. The conjugation of these variables was assessed in terms of printability, sheet resistance and TE response. The best electrical-TE output combination is achieved by printing two layers of the ink with 20 wt% of graphite on an office paper substrate. Subsequently, thermal touch sensors with up to 48 TE elements were produced to increase the output voltage response (>4.5 mV) promoted by a gloved finger touch. Fast and repeatable touch recognition were obtained in optimized devices with a signal-to-noise ratio up to 340 and rise times bellow 0.5 s. The results evidence that the screen-printed graphite-based inks are highly suitable for flexible TE sensing applications. |
publishDate |
2023 |
dc.date.none.fl_str_mv |
2023 2023-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://hdl.handle.net/1822/89499 |
url |
https://hdl.handle.net/1822/89499 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
2058-8585 2058-8585 10.1088/2058-8585/acc114 025001 https://iopscience.iop.org/article/10.1088/2058-8585/acc114 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
IOP Publishing |
publisher.none.fl_str_mv |
IOP Publishing |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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