Synergetic Light-Harvesting and Near-Field Enhancement in Multiscale Patterned Gold Substrates

Autores
Hernandez, Luis Alfonso Guerra; Millone, María Antonieta Daza; Cortés, Emiliano; Castez, Marcos Federico; Auguié, Baptiste; Vela, María Elena; Salvarezza, Roberto Carlos; Fainstein, Alejandro
Año de publicación
2015
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Sphere-segment void (SSV) cavities have emerged as promising substrates for reproducible Surface Enhanced Raman Scattering (SERS), offering strong and uniform electromagnetic enhancement associated with the excitation of cavity-like localized surface plasmon resonances tunable across the UV–vis-near IR range, with a facile large-scale fabrication process. High-resolution electron micrographs of these structures reveal a considerable departure from the idealized smooth spherical cavity shape; notably, the electrochemical deposition of gold yields an important surface roughness. We investigate this contribution to the SERS activity of SSV substrates with a series of experiments, varying the degree of surface roughness using thermal annealing and gradual electrochemical roughening. Notably, we observe that both roughness features and cavity-like modes operate in conjunction as a multiscale antenna to provide larger SERS efficiency than the two mechanisms considered separately. We conclude that the main role of the ordered cavity structure is to increase the plasmonic mode density near rough surface features, thus optimizing the coupling of far-field radiation (light harvesting) to locally enhanced near fields.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
Materia
Química
Física
Ciencias Exactas
Plasmonic substrates
Sphere-segment void arrays
Roughness
Multiscale antennas
Surface Enhanced Raman Spectroscopies
Sensing
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/140853

id SEDICI_d8c2fd50b501bdffcb3a0154d4db412b
oai_identifier_str oai:sedici.unlp.edu.ar:10915/140853
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Synergetic Light-Harvesting and Near-Field Enhancement in Multiscale Patterned Gold SubstratesHernandez, Luis Alfonso GuerraMillone, María Antonieta DazaCortés, EmilianoCastez, Marcos FedericoAuguié, BaptisteVela, María ElenaSalvarezza, Roberto CarlosFainstein, AlejandroQuímicaFísicaCiencias ExactasPlasmonic substratesSphere-segment void arraysRoughnessMultiscale antennasSurface Enhanced Raman SpectroscopiesSensingSphere-segment void (SSV) cavities have emerged as promising substrates for reproducible Surface Enhanced Raman Scattering (SERS), offering strong and uniform electromagnetic enhancement associated with the excitation of cavity-like localized surface plasmon resonances tunable across the UV–vis-near IR range, with a facile large-scale fabrication process. High-resolution electron micrographs of these structures reveal a considerable departure from the idealized smooth spherical cavity shape; notably, the electrochemical deposition of gold yields an important surface roughness. We investigate this contribution to the SERS activity of SSV substrates with a series of experiments, varying the degree of surface roughness using thermal annealing and gradual electrochemical roughening. Notably, we observe that both roughness features and cavity-like modes operate in conjunction as a multiscale antenna to provide larger SERS efficiency than the two mechanisms considered separately. We conclude that the main role of the ordered cavity structure is to increase the plasmonic mode density near rough surface features, thus optimizing the coupling of far-field radiation (light harvesting) to locally enhanced near fields.Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas2015-08-25info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf1355-1365http://sedici.unlp.edu.ar/handle/10915/140853enginfo:eu-repo/semantics/altIdentifier/issn/2330-4022info:eu-repo/semantics/altIdentifier/doi/10.1021/acsphotonics.5b00345info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:32:06Zoai:sedici.unlp.edu.ar:10915/140853Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:32:07.269SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Synergetic Light-Harvesting and Near-Field Enhancement in Multiscale Patterned Gold Substrates
title Synergetic Light-Harvesting and Near-Field Enhancement in Multiscale Patterned Gold Substrates
spellingShingle Synergetic Light-Harvesting and Near-Field Enhancement in Multiscale Patterned Gold Substrates
Hernandez, Luis Alfonso Guerra
Química
Física
Ciencias Exactas
Plasmonic substrates
Sphere-segment void arrays
Roughness
Multiscale antennas
Surface Enhanced Raman Spectroscopies
Sensing
title_short Synergetic Light-Harvesting and Near-Field Enhancement in Multiscale Patterned Gold Substrates
title_full Synergetic Light-Harvesting and Near-Field Enhancement in Multiscale Patterned Gold Substrates
title_fullStr Synergetic Light-Harvesting and Near-Field Enhancement in Multiscale Patterned Gold Substrates
title_full_unstemmed Synergetic Light-Harvesting and Near-Field Enhancement in Multiscale Patterned Gold Substrates
title_sort Synergetic Light-Harvesting and Near-Field Enhancement in Multiscale Patterned Gold Substrates
dc.creator.none.fl_str_mv Hernandez, Luis Alfonso Guerra
Millone, María Antonieta Daza
Cortés, Emiliano
Castez, Marcos Federico
Auguié, Baptiste
Vela, María Elena
Salvarezza, Roberto Carlos
Fainstein, Alejandro
author Hernandez, Luis Alfonso Guerra
author_facet Hernandez, Luis Alfonso Guerra
Millone, María Antonieta Daza
Cortés, Emiliano
Castez, Marcos Federico
Auguié, Baptiste
Vela, María Elena
Salvarezza, Roberto Carlos
Fainstein, Alejandro
author_role author
author2 Millone, María Antonieta Daza
Cortés, Emiliano
Castez, Marcos Federico
Auguié, Baptiste
Vela, María Elena
Salvarezza, Roberto Carlos
Fainstein, Alejandro
author2_role author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Química
Física
Ciencias Exactas
Plasmonic substrates
Sphere-segment void arrays
Roughness
Multiscale antennas
Surface Enhanced Raman Spectroscopies
Sensing
topic Química
Física
Ciencias Exactas
Plasmonic substrates
Sphere-segment void arrays
Roughness
Multiscale antennas
Surface Enhanced Raman Spectroscopies
Sensing
dc.description.none.fl_txt_mv Sphere-segment void (SSV) cavities have emerged as promising substrates for reproducible Surface Enhanced Raman Scattering (SERS), offering strong and uniform electromagnetic enhancement associated with the excitation of cavity-like localized surface plasmon resonances tunable across the UV–vis-near IR range, with a facile large-scale fabrication process. High-resolution electron micrographs of these structures reveal a considerable departure from the idealized smooth spherical cavity shape; notably, the electrochemical deposition of gold yields an important surface roughness. We investigate this contribution to the SERS activity of SSV substrates with a series of experiments, varying the degree of surface roughness using thermal annealing and gradual electrochemical roughening. Notably, we observe that both roughness features and cavity-like modes operate in conjunction as a multiscale antenna to provide larger SERS efficiency than the two mechanisms considered separately. We conclude that the main role of the ordered cavity structure is to increase the plasmonic mode density near rough surface features, thus optimizing the coupling of far-field radiation (light harvesting) to locally enhanced near fields.
Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas
description Sphere-segment void (SSV) cavities have emerged as promising substrates for reproducible Surface Enhanced Raman Scattering (SERS), offering strong and uniform electromagnetic enhancement associated with the excitation of cavity-like localized surface plasmon resonances tunable across the UV–vis-near IR range, with a facile large-scale fabrication process. High-resolution electron micrographs of these structures reveal a considerable departure from the idealized smooth spherical cavity shape; notably, the electrochemical deposition of gold yields an important surface roughness. We investigate this contribution to the SERS activity of SSV substrates with a series of experiments, varying the degree of surface roughness using thermal annealing and gradual electrochemical roughening. Notably, we observe that both roughness features and cavity-like modes operate in conjunction as a multiscale antenna to provide larger SERS efficiency than the two mechanisms considered separately. We conclude that the main role of the ordered cavity structure is to increase the plasmonic mode density near rough surface features, thus optimizing the coupling of far-field radiation (light harvesting) to locally enhanced near fields.
publishDate 2015
dc.date.none.fl_str_mv 2015-08-25
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/140853
url http://sedici.unlp.edu.ar/handle/10915/140853
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/2330-4022
info:eu-repo/semantics/altIdentifier/doi/10.1021/acsphotonics.5b00345
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
dc.format.none.fl_str_mv application/pdf
1355-1365
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
_version_ 1844616200701607936
score 13.070432