Simple synthesis of gold-decorated silica nanoparticles by in situ precipitation method with new plasmonic properties

We describe a simple method for the preparation of gold-decorated silica (SiO₂) nanoparticles (NPs) by the in situ precipitation method using simple BH₄⁻ ions reduction as a procedure, where BH₄⁻ ions are adsorbed onto PEI-functionalized SiO₂ NPs for stabilizing and reducing gold ions onto PEI-SiO₂...

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Autores principales: Félix, Lizbet León, Martínez Porcel, Joaquín, Herrera Aragón, Fermín Fidel, Pacheco Salazar, David Gregorio, Sousa, Marcelo Henrique
Formato: Articulo
Lenguaje:Inglés
Publicado: 2021
Materias:
Ciencias Exactas
Física
Gold
Decorated
PEI-coated silica
Polyethyleneimine
Red-shift
Plasmonic
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/123834
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-123834
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Exactas
Física
Gold
Decorated
PEI-coated silica
Polyethyleneimine
Red-shift
Plasmonic
spellingShingle Ciencias Exactas
Física
Gold
Decorated
PEI-coated silica
Polyethyleneimine
Red-shift
Plasmonic
Félix, Lizbet León
Martínez Porcel, Joaquín
Herrera Aragón, Fermín Fidel
Pacheco Salazar, David Gregorio
Sousa, Marcelo Henrique
Simple synthesis of gold-decorated silica nanoparticles by in situ precipitation method with new plasmonic properties
topic_facet Ciencias Exactas
Física
Gold
Decorated
PEI-coated silica
Polyethyleneimine
Red-shift
Plasmonic
description We describe a simple method for the preparation of gold-decorated silica (SiO₂) nanoparticles (NPs) by the in situ precipitation method using simple BH₄⁻ ions reduction as a procedure, where BH₄⁻ ions are adsorbed onto PEI-functionalized SiO₂ NPs for stabilizing and reducing gold ions onto PEI-SiO₂ surface in water under ambient conditions. The result was 3-nm gold nanoshell NPs attached to SiO₂ core (~ 75 nm) with a surface plasmon resonance (SPR) at ~ 680 nm. SPR band is associated with Au NP aggregates that arise from strong interparticle interaction. This is an alternative to the gold-seeding methods and the use of anionic gold species for the obtention of gold-decorated SiO₂ NPs with an important red-shift in UV–Vis absorption and with potential applications in biosensors and photothermal therapy.
format Articulo
Articulo
author Félix, Lizbet León
Martínez Porcel, Joaquín
Herrera Aragón, Fermín Fidel
Pacheco Salazar, David Gregorio
Sousa, Marcelo Henrique
author_facet Félix, Lizbet León
Martínez Porcel, Joaquín
Herrera Aragón, Fermín Fidel
Pacheco Salazar, David Gregorio
Sousa, Marcelo Henrique
author_sort Félix, Lizbet León
title Simple synthesis of gold-decorated silica nanoparticles by in situ precipitation method with new plasmonic properties
title_short Simple synthesis of gold-decorated silica nanoparticles by in situ precipitation method with new plasmonic properties
title_full Simple synthesis of gold-decorated silica nanoparticles by in situ precipitation method with new plasmonic properties
title_fullStr Simple synthesis of gold-decorated silica nanoparticles by in situ precipitation method with new plasmonic properties
title_full_unstemmed Simple synthesis of gold-decorated silica nanoparticles by in situ precipitation method with new plasmonic properties
title_sort simple synthesis of gold-decorated silica nanoparticles by in situ precipitation method with new plasmonic properties
publishDate 2021
url http://sedici.unlp.edu.ar/handle/10915/123834
work_keys_str_mv AT felixlizbetleon simplesynthesisofgolddecoratedsilicananoparticlesbyinsituprecipitationmethodwithnewplasmonicproperties
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bdutipo_str Repositorios
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