Optical nanoparticle sorting elucidates synthesis of plasmonic nanotriangles

We investigate the optical and morphological properties of gold nanoparticles grown by reducing a gold salt with Na2S. Lasers are tuned to the observed plasmon resonances, and the optical forces exerted on the nanoparticles are used to selectively print individual nanoparticles onto a substrate. Thi...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Huergo, María Ana Cristina, Maier, Christoph, Castez, Marcos Federico, Vericat, Carolina, Nedev, Spas, Salvarezza, Roberto Carlos, Urban, Alexander, Feldmann, Jochen
Formato: Articulo Preprint
Lenguaje:Inglés
Publicado: 2016
Materias:
Física
Optical printing
Gold nanoparticles
Cancer therapy
Nanoshells
Plasmon
Nanoparticle sorting
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/101956
https://ri.conicet.gov.ar/11336/44235
https://pubs.acs.org/doi/10.1021/acsnano.5b08095
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-101956
record_format dspace
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Física
Optical printing
Gold nanoparticles
Cancer therapy
Nanoshells
Plasmon
Nanoparticle sorting
spellingShingle Física
Optical printing
Gold nanoparticles
Cancer therapy
Nanoshells
Plasmon
Nanoparticle sorting
Huergo, María Ana Cristina
Maier, Christoph
Castez, Marcos Federico
Vericat, Carolina
Nedev, Spas
Salvarezza, Roberto Carlos
Urban, Alexander
Feldmann, Jochen
Optical nanoparticle sorting elucidates synthesis of plasmonic nanotriangles
topic_facet Física
Optical printing
Gold nanoparticles
Cancer therapy
Nanoshells
Plasmon
Nanoparticle sorting
description We investigate the optical and morphological properties of gold nanoparticles grown by reducing a gold salt with Na2S. Lasers are tuned to the observed plasmon resonances, and the optical forces exerted on the nanoparticles are used to selectively print individual nanoparticles onto a substrate. This enables us to combine dark-field spectroscopy and scanning electron microscopy to compare the optical properties of single nanoparticles with their morphology. By arresting the synthesis at different times, we are able to investigate which type of nanoparticle is responsible for the respective resonances. We find that thin Au nanotriangles are the source of the observed near infrared (NIR) resonance. The initial lateral growth of these triangles causes the plasmon resonance to redshift into the NIR, whereas a subsequent thickening of the triangles and a concomitant truncation lead to a blueshift of the resonance. Furthermore, we find that the nanotriangles produced have extremely narrow line widths (187 ± 23 meV), show nearly isotropic scattering, and are stable for long periods of time. This shows their vast potential for applications such as in vivo imaging and bio(chemical) sensing. The method used here is generally applicable to other syntheses, and shows how complex nanostructures can be built up on substrates by selectively printing NPs of varying plasmonic resonances.
format Articulo
Preprint
author Huergo, María Ana Cristina
Maier, Christoph
Castez, Marcos Federico
Vericat, Carolina
Nedev, Spas
Salvarezza, Roberto Carlos
Urban, Alexander
Feldmann, Jochen
author_facet Huergo, María Ana Cristina
Maier, Christoph
Castez, Marcos Federico
Vericat, Carolina
Nedev, Spas
Salvarezza, Roberto Carlos
Urban, Alexander
Feldmann, Jochen
author_sort Huergo, María Ana Cristina
title Optical nanoparticle sorting elucidates synthesis of plasmonic nanotriangles
title_short Optical nanoparticle sorting elucidates synthesis of plasmonic nanotriangles
title_full Optical nanoparticle sorting elucidates synthesis of plasmonic nanotriangles
title_fullStr Optical nanoparticle sorting elucidates synthesis of plasmonic nanotriangles
title_full_unstemmed Optical nanoparticle sorting elucidates synthesis of plasmonic nanotriangles
title_sort optical nanoparticle sorting elucidates synthesis of plasmonic nanotriangles
publishDate 2016
url http://sedici.unlp.edu.ar/handle/10915/101956
https://ri.conicet.gov.ar/11336/44235
https://pubs.acs.org/doi/10.1021/acsnano.5b08095
work_keys_str_mv AT huergomariaanacristina opticalnanoparticlesortingelucidatessynthesisofplasmonicnanotriangles
AT maierchristoph opticalnanoparticlesortingelucidatessynthesisofplasmonicnanotriangles
AT castezmarcosfederico opticalnanoparticlesortingelucidatessynthesisofplasmonicnanotriangles
AT vericatcarolina opticalnanoparticlesortingelucidatessynthesisofplasmonicnanotriangles
AT nedevspas opticalnanoparticlesortingelucidatessynthesisofplasmonicnanotriangles
AT salvarezzarobertocarlos opticalnanoparticlesortingelucidatessynthesisofplasmonicnanotriangles
AT urbanalexander opticalnanoparticlesortingelucidatessynthesisofplasmonicnanotriangles
AT feldmannjochen opticalnanoparticlesortingelucidatessynthesisofplasmonicnanotriangles
bdutipo_str Repositorios
_version_ 1764820440596873216

Ejemplares similares