Plasmonic strain sensors based on Au-TiO2 thin films on flexible substrates
Autor(a) principal: | |
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Data de Publicação: | 2022 |
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/1822/78967 |
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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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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1799132282607370240 |