Monitoring the Photothermal Reshaping of Individual Plasmonic Nanorods with Coherent Mechanical Oscillations

Light absorption in gold nanoparticles leads to metal heating that induces photothermal reshaping because of atomic surface diffusion at temperatures well below the gold melting point. In this work, we perform time-resolved experiments to measure the frequencies of the extensional coherent mechanica...

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Autores principales: Scarpettini, Alberto, Della Picca, Fabricio, Gutierrez, Marina, Bragas, Andrea
Formato: Artículo publishedVersion
Lenguaje:Inglés
Publicado: 2019
Materias:
UTN
FRD
gold nanoparticles
photothermal reshaping
Acceso en línea:http://hdl.handle.net/20.500.12272/3758
Aporte de:
RIA - Repositorio Institucional Abierto (UTN) de Universidad Tecnológica Nacional
id I68-R174-20.500.12272-3758
record_format dspace
institution Universidad Tecnológica Nacional
institution_str I-68
repository_str R-174
collection RIA - Repositorio Institucional Abierto (UTN)
language Inglés
topic UTN
FRD
gold nanoparticles
photothermal reshaping
spellingShingle UTN
FRD
gold nanoparticles
photothermal reshaping
Scarpettini, Alberto
Della Picca, Fabricio
Gutierrez, Marina
Bragas, Andrea
Monitoring the Photothermal Reshaping of Individual Plasmonic Nanorods with Coherent Mechanical Oscillations
topic_facet UTN
FRD
gold nanoparticles
photothermal reshaping
description Light absorption in gold nanoparticles leads to metal heating that induces photothermal reshaping because of atomic surface diffusion at temperatures well below the gold melting point. In this work, we perform time-resolved experiments to measure the frequencies of the extensional coherent mechanical mode in single gold nanorods, as a monitor of the changes in their aspect ratio produced by this photoinduced reshaping. We show that photothermal reshaping always occurs in typical pump–probe experiments conducted in air even at low-excitation light irradiance and usually long measuring times. The reshaping effect can be reduced by a polymer coating, which allows faster heat dissipation from the nanoparticle to the environment.
format Artículo
publishedVersion
Artículo
author Scarpettini, Alberto
Della Picca, Fabricio
Gutierrez, Marina
Bragas, Andrea
author_facet Scarpettini, Alberto
Della Picca, Fabricio
Gutierrez, Marina
Bragas, Andrea
author_sort Scarpettini, Alberto
title Monitoring the Photothermal Reshaping of Individual Plasmonic Nanorods with Coherent Mechanical Oscillations
title_short Monitoring the Photothermal Reshaping of Individual Plasmonic Nanorods with Coherent Mechanical Oscillations
title_full Monitoring the Photothermal Reshaping of Individual Plasmonic Nanorods with Coherent Mechanical Oscillations
title_fullStr Monitoring the Photothermal Reshaping of Individual Plasmonic Nanorods with Coherent Mechanical Oscillations
title_full_unstemmed Monitoring the Photothermal Reshaping of Individual Plasmonic Nanorods with Coherent Mechanical Oscillations
title_sort monitoring the photothermal reshaping of individual plasmonic nanorods with coherent mechanical oscillations
publishDate 2019
url http://hdl.handle.net/20.500.12272/3758
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AT gutierrezmarina monitoringthephotothermalreshapingofindividualplasmonicnanorodswithcoherentmechanicaloscillations
AT bragasandrea monitoringthephotothermalreshapingofindividualplasmonicnanorodswithcoherentmechanicaloscillations
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