Plasmonic strain sensors based on Au-TiO2 thin films on flexible substrates

Detalhes bibliográficos
Autor(a) principal: Rodrigues, Marco S.
Data de Publicação: 2022
Outros Autores: Borges, Joel, Vaz, F.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: https://hdl.handle.net/1822/78967
Resumo: This study aimed at introducing thin films exhibiting the localized surface plasmon resonance (LSPR) phenomenon with a reversible optical response to repeated uniaxial strain. The sensing platform was prepared by growing gold (Au) nanoparticles throughout a titanium dioxide dielectric matrix. The thin films were deposited on transparent polymeric substrates, using reactive magnetron sputtering, followed by a low temperature thermal treatment to grow the nanoparticles. The microstructural characterization of the thin films’ surface revealed Au nanoparticle with an average size of 15.9 nm, an aspect ratio of 1.29 and an average nearest neighbor nanoparticle at 16.3 nm distance. The plasmonic response of the flexible nanoplasmonic transducers was characterized with custom-made mechanical testing equipment using simultaneous optical transmittance measurements. The higher sensitivity that was obtained at a maximum strain of 6.7%, reached the values of 420 nm/<i>ε</i> and 110 pp/<i>ε</i> when measured at the wavelength or transmittance coordinates of the transmittance-LSPR band minimum, respectively. The higher transmittance gauge factor of 4.5 was obtained for a strain of 10.1%. Optical modelling, using discrete dipole approximation, seems to correlate the optical response of the strained thin film sensor to a reduction in the refractive index of the matrix surrounding the gold nanoparticles when uniaxial strain is applied.
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spelling Plasmonic strain sensors based on Au-TiO2 thin films on flexible substratesGold nanoparticlesLocalized surface plasmon resonanceFlexible optical sensorsPlasmonic thin filmsScience & TechnologyThis study aimed at introducing thin films exhibiting the localized surface plasmon resonance (LSPR) phenomenon with a reversible optical response to repeated uniaxial strain. The sensing platform was prepared by growing gold (Au) nanoparticles throughout a titanium dioxide dielectric matrix. The thin films were deposited on transparent polymeric substrates, using reactive magnetron sputtering, followed by a low temperature thermal treatment to grow the nanoparticles. The microstructural characterization of the thin films’ surface revealed Au nanoparticle with an average size of 15.9 nm, an aspect ratio of 1.29 and an average nearest neighbor nanoparticle at 16.3 nm distance. The plasmonic response of the flexible nanoplasmonic transducers was characterized with custom-made mechanical testing equipment using simultaneous optical transmittance measurements. The higher sensitivity that was obtained at a maximum strain of 6.7%, reached the values of 420 nm/<i>ε</i> and 110 pp/<i>ε</i> when measured at the wavelength or transmittance coordinates of the transmittance-LSPR band minimum, respectively. The higher transmittance gauge factor of 4.5 was obtained for a strain of 10.1%. Optical modelling, using discrete dipole approximation, seems to correlate the optical response of the strained thin film sensor to a reduction in the refractive index of the matrix surrounding the gold nanoparticles when uniaxial strain is applied.This research was funded by the Portuguese Foundation for Science and Technology (FCT) in the framework of the Strategic Funding UIDB/04650/2020 and by the projects NANO4BIO: POCI01-0145-FEDER-032299, with FCT reference PTDC/FIS-MAC/32299/2017, and CO2Plasmon with FCT reference EXPL/CTM-REF/0750/2021.Multidisciplinary Digital Publishing Institute (MDPI)Universidade do MinhoRodrigues, Marco S.Borges, JoelVaz, F.2022-02-112022-02-11T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/78967engRodrigues, M.S.; Borges, J.; Vaz, F. Plasmonic Strain Sensors Based on Au-TiO2 Thin Films on Flexible Substrates. Sensors 2022, 22, 1375. https://doi.org/10.3390/s220413751424-82201424-822010.3390/s22041375352142781375https://www.mdpi.com/1424-8220/22/4/1375info: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:RCAAP2023-07-21T12:01:13Zoai:repositorium.sdum.uminho.pt:1822/78967Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T18:51:08.242505Repositório 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 Plasmonic strain sensors based on Au-TiO2 thin films on flexible substrates
title Plasmonic strain sensors based on Au-TiO2 thin films on flexible substrates
spellingShingle Plasmonic strain sensors based on Au-TiO2 thin films on flexible substrates
Rodrigues, Marco S.
Gold nanoparticles
Localized surface plasmon resonance
Flexible optical sensors
Plasmonic thin films
Science & Technology
title_short Plasmonic strain sensors based on Au-TiO2 thin films on flexible substrates
title_full Plasmonic strain sensors based on Au-TiO2 thin films on flexible substrates
title_fullStr Plasmonic strain sensors based on Au-TiO2 thin films on flexible substrates
title_full_unstemmed Plasmonic strain sensors based on Au-TiO2 thin films on flexible substrates
title_sort Plasmonic strain sensors based on Au-TiO2 thin films on flexible substrates
author Rodrigues, Marco S.
author_facet Rodrigues, Marco S.
Borges, Joel
Vaz, F.
author_role author
author2 Borges, Joel
Vaz, F.
author2_role author
author
dc.contributor.none.fl_str_mv Universidade do Minho
dc.contributor.author.fl_str_mv Rodrigues, Marco S.
Borges, Joel
Vaz, F.
dc.subject.por.fl_str_mv Gold nanoparticles
Localized surface plasmon resonance
Flexible optical sensors
Plasmonic thin films
Science & Technology
topic Gold nanoparticles
Localized surface plasmon resonance
Flexible optical sensors
Plasmonic thin films
Science & Technology
description This study aimed at introducing thin films exhibiting the localized surface plasmon resonance (LSPR) phenomenon with a reversible optical response to repeated uniaxial strain. The sensing platform was prepared by growing gold (Au) nanoparticles throughout a titanium dioxide dielectric matrix. The thin films were deposited on transparent polymeric substrates, using reactive magnetron sputtering, followed by a low temperature thermal treatment to grow the nanoparticles. The microstructural characterization of the thin films’ surface revealed Au nanoparticle with an average size of 15.9 nm, an aspect ratio of 1.29 and an average nearest neighbor nanoparticle at 16.3 nm distance. The plasmonic response of the flexible nanoplasmonic transducers was characterized with custom-made mechanical testing equipment using simultaneous optical transmittance measurements. The higher sensitivity that was obtained at a maximum strain of 6.7%, reached the values of 420 nm/<i>ε</i> and 110 pp/<i>ε</i> when measured at the wavelength or transmittance coordinates of the transmittance-LSPR band minimum, respectively. The higher transmittance gauge factor of 4.5 was obtained for a strain of 10.1%. Optical modelling, using discrete dipole approximation, seems to correlate the optical response of the strained thin film sensor to a reduction in the refractive index of the matrix surrounding the gold nanoparticles when uniaxial strain is applied.
publishDate 2022
dc.date.none.fl_str_mv 2022-02-11
2022-02-11T00:00:00Z
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/1822/78967
url https://hdl.handle.net/1822/78967
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Rodrigues, M.S.; Borges, J.; Vaz, F. Plasmonic Strain Sensors Based on Au-TiO2 Thin Films on Flexible Substrates. Sensors 2022, 22, 1375. https://doi.org/10.3390/s22041375
1424-8220
1424-8220
10.3390/s22041375
35214278
1375
https://www.mdpi.com/1424-8220/22/4/1375
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 Multidisciplinary Digital Publishing Institute (MDPI)
publisher.none.fl_str_mv Multidisciplinary Digital Publishing Institute (MDPI)
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
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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