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Simple synthesis of gold-decorated silica nanoparticles by in situ precipitation method with new plasmonic properties
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Simple synthesis of gold-decorated silica nanoparticles by in situ precipitation method with new plasmonic properties
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Journal Article
Simple synthesis of gold-decorated silica nanoparticles by in situ precipitation method with new plasmonic properties
2021
Overview
We describe a simple method for the preparation of gold-decorated silica (SiO
2
) nanoparticles (NPs) by the in situ precipitation method using simple BH
4
−
ions reduction as a procedure, where BH
4
−
ions are adsorbed onto PEI-functionalized SiO
2
NPs for stabilizing and reducing gold ions onto PEI-SiO
2
surface in water under ambient conditions. The result was 3-nm gold nanoshell NPs attached to SiO
2
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 SiO
2
NPs with an important red-shift in UV–Vis absorption and with potential applications in biosensors and photothermal therapy.
Publisher
Springer International Publishing,Springer Nature B.V
Subject
