Surface plasmon resonances in silver nanostars
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.3390/s18113821 http://hdl.handle.net/11449/188339 |
Resumo: | The recent development of silver nanostars (Ag-NSs) is promising for improved surface-enhanced sensing and spectroscopy, which may be further exploited if the mechanisms behind the excitation of localized surface plasmon resonances (LSPRs) are identified. Here, we show that LSPRs in Ag-NSs can be obtained with finite-difference time-domain (FDTD) calculations by considering the nanostars as combination of crossed nanorods (Ag-NRs). In particular, we demonstrate that an apparent tail at large wavelengths (λ > 700 nm) observed in the extinction spectra of Ag-NSs is due to a strong dipolar plasmon resonance, with no need to invoke heterogeneity (different number of arms) effects as is normally done in the literature. Our description also indicates a way to tune the strongest LSPR at desired wavelengths, which is useful for sensing applications. |
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Repositório Institucional da UNESP |
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Surface plasmon resonances in silver nanostarsAg nanostarsMetallic nanoparticlesPlasmonic biosensingThe recent development of silver nanostars (Ag-NSs) is promising for improved surface-enhanced sensing and spectroscopy, which may be further exploited if the mechanisms behind the excitation of localized surface plasmon resonances (LSPRs) are identified. Here, we show that LSPRs in Ag-NSs can be obtained with finite-difference time-domain (FDTD) calculations by considering the nanostars as combination of crossed nanorods (Ag-NRs). In particular, we demonstrate that an apparent tail at large wavelengths (λ > 700 nm) observed in the extinction spectra of Ag-NSs is due to a strong dipolar plasmon resonance, with no need to invoke heterogeneity (different number of arms) effects as is normally done in the literature. Our description also indicates a way to tune the strongest LSPR at desired wavelengths, which is useful for sensing applications.Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Departamento Administrativo de Ciencia, Tecnología e InnovaciónDepartamento de Física Universidad del ValleDepartment of Applied Physics University of Cantabria, Avda. Los Castros, s/nSchool of Technology and Applied Sciences São Paulo State University (UNESP), Campus Presidente PrudenteSão Carlos Institute of Physics University of São Paulo, PO Box 369National Institute of Telecommunications (Inatel)School of Technology and Applied Sciences São Paulo State University (UNESP), Campus Presidente PrudenteCAPES: 2013/01897-4CNPq: 2013/01897-4FAPESP: 2013/01897-4CAPES: 2013/14262-7CNPq: 2013/14262-7FAPESP: 2013/14262-7CAPES: 2016/06612-6CNPq: 2016/06612-6FAPESP: 2016/06612-6CAPES: 2016/09634-0CNPq: 2016/09634-0FAPESP: 2016/09634-0CAPES: 2016/12311-9CNPq: 2016/12311-9FAPESP: 2016/12311-9Departamento Administrativo de Ciencia, Tecnología e Innovación: FP44842-128-2017Universidad del ValleUniversity of CantabriaUniversidade Estadual Paulista (Unesp)Universidade de São Paulo (USP)National Institute of Telecommunications (Inatel)Gómez, Faustino ReyesRubira, Rafael J. G. [UNESP]Camacho, Sabrina A. [UNESP]Martin, Cibely S. [UNESP]da Silva, Robson R.Constantino, Carlos J. L. [UNESP]Alessio, Priscila [UNESP]Oliveira, Osvaldo N.Mejía-Salazar, J. Ricardo2019-10-06T16:04:54Z2019-10-06T16:04:54Z2018-11-08info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://dx.doi.org/10.3390/s18113821Sensors (Switzerland), v. 18, n. 11, 2018.1424-8220http://hdl.handle.net/11449/18833910.3390/s181138212-s2.0-85056332029972712220321926397271222032192630000-0002-1345-0540Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengSensors (Switzerland)info:eu-repo/semantics/openAccess2024-06-18T18:17:51Zoai:repositorio.unesp.br:11449/188339Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T14:34:41.288774Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Surface plasmon resonances in silver nanostars |
title |
Surface plasmon resonances in silver nanostars |
spellingShingle |
Surface plasmon resonances in silver nanostars Gómez, Faustino Reyes Ag nanostars Metallic nanoparticles Plasmonic biosensing |
title_short |
Surface plasmon resonances in silver nanostars |
title_full |
Surface plasmon resonances in silver nanostars |
title_fullStr |
Surface plasmon resonances in silver nanostars |
title_full_unstemmed |
Surface plasmon resonances in silver nanostars |
title_sort |
Surface plasmon resonances in silver nanostars |
author |
Gómez, Faustino Reyes |
author_facet |
Gómez, Faustino Reyes Rubira, Rafael J. G. [UNESP] Camacho, Sabrina A. [UNESP] Martin, Cibely S. [UNESP] da Silva, Robson R. Constantino, Carlos J. L. [UNESP] Alessio, Priscila [UNESP] Oliveira, Osvaldo N. Mejía-Salazar, J. Ricardo |
author_role |
author |
author2 |
Rubira, Rafael J. G. [UNESP] Camacho, Sabrina A. [UNESP] Martin, Cibely S. [UNESP] da Silva, Robson R. Constantino, Carlos J. L. [UNESP] Alessio, Priscila [UNESP] Oliveira, Osvaldo N. Mejía-Salazar, J. Ricardo |
author2_role |
author author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidad del Valle University of Cantabria Universidade Estadual Paulista (Unesp) Universidade de São Paulo (USP) National Institute of Telecommunications (Inatel) |
dc.contributor.author.fl_str_mv |
Gómez, Faustino Reyes Rubira, Rafael J. G. [UNESP] Camacho, Sabrina A. [UNESP] Martin, Cibely S. [UNESP] da Silva, Robson R. Constantino, Carlos J. L. [UNESP] Alessio, Priscila [UNESP] Oliveira, Osvaldo N. Mejía-Salazar, J. Ricardo |
dc.subject.por.fl_str_mv |
Ag nanostars Metallic nanoparticles Plasmonic biosensing |
topic |
Ag nanostars Metallic nanoparticles Plasmonic biosensing |
description |
The recent development of silver nanostars (Ag-NSs) is promising for improved surface-enhanced sensing and spectroscopy, which may be further exploited if the mechanisms behind the excitation of localized surface plasmon resonances (LSPRs) are identified. Here, we show that LSPRs in Ag-NSs can be obtained with finite-difference time-domain (FDTD) calculations by considering the nanostars as combination of crossed nanorods (Ag-NRs). In particular, we demonstrate that an apparent tail at large wavelengths (λ > 700 nm) observed in the extinction spectra of Ag-NSs is due to a strong dipolar plasmon resonance, with no need to invoke heterogeneity (different number of arms) effects as is normally done in the literature. Our description also indicates a way to tune the strongest LSPR at desired wavelengths, which is useful for sensing applications. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-11-08 2019-10-06T16:04:54Z 2019-10-06T16:04:54Z |
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 |
http://dx.doi.org/10.3390/s18113821 Sensors (Switzerland), v. 18, n. 11, 2018. 1424-8220 http://hdl.handle.net/11449/188339 10.3390/s18113821 2-s2.0-85056332029 9727122203219263 9727122203219263 0000-0002-1345-0540 |
url |
http://dx.doi.org/10.3390/s18113821 http://hdl.handle.net/11449/188339 |
identifier_str_mv |
Sensors (Switzerland), v. 18, n. 11, 2018. 1424-8220 10.3390/s18113821 2-s2.0-85056332029 9727122203219263 0000-0002-1345-0540 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Sensors (Switzerland) |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128380727459840 |