Surface plasmon resonances in silver nanostars

Detalhes bibliográficos
Autor(a) principal: Gómez, Faustino Reyes
Data de Publicação: 2018
Outros Autores: 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
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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spelling 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