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

Lizbet León Félix; Joaquin Martinez Porcel; Fermín Fidel Herrera Aragón; David Gregorio Pacheco Salazar; Marcelo Henrique Sousa

doi:10.1007/s42452-021-04456-0

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

Lizbet León Félix, Joaquin Martinez Porcel, Fermín Fidel Herrera Aragón, David Gregorio Pacheco Salazar, Marcelo Henrique Sousa

Departamento Académico de Física

Research output: Contribution to journal › Article › peer-review

Abstract

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.

Original language	English
Article number	443
Journal	SN Applied Sciences
Volume	3
Issue number	4
DOIs	https://doi.org/10.1007/s42452-021-04456-0
State	Published - Apr 2021

Bibliographical note

Funding Information:
This work was supported by CONCYTEC?FONDECYT within the framework E038-01?[contract N? 07-2019-FONDECYT-BM-INC. INV.].

Publisher Copyright:
© 2021, The Author(s).

Keywords

Decorated
Gold
PEI-coated silica
Plasmonic
Polyethyleneimine
Red-shift

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10.1007/s42452-021-04456-0

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

abstract = "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.",

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author = "F{\'e}lix, {Lizbet Le{\'o}n} and Porcel, {Joaquin Martinez} and Arag{\'o}n, {Ferm{\'i}n Fidel Herrera} and {Pacheco Salazar}, {David Gregorio} and Sousa, {Marcelo Henrique}",

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doi = "10.1007/s42452-021-04456-0",

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T1 - Simple synthesis of gold-decorated silica nanoparticles by in situ precipitation method with new plasmonic properties

AU - Félix, Lizbet León

AU - Porcel, Joaquin Martinez

AU - Aragón, Fermín Fidel Herrera

AU - Pacheco Salazar, David Gregorio

AU - Sousa, Marcelo Henrique

PY - 2021/4

Y1 - 2021/4

N2 - 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.

AB - 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.

KW - Decorated

KW - Gold

KW - PEI-coated silica

KW - Plasmonic

KW - Polyethyleneimine

KW - Red-shift

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DO - 10.1007/s42452-021-04456-0

M3 - Artículo

AN - SCOPUS:85102185123

SN - 2523-3971

VL - 3

JO - SN Applied Sciences

JF - SN Applied Sciences

IS - 4

M1 - 443

ER -

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

Abstract

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Keywords

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