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Quantitative optical microspectroscopy, electron microscopy, and modelling of individual silver nanocubes reveal surface compositional changes at the nanoscale
The optical response of metal nanoparticles is governed by plasmonic resonances, which depend often intricately on the geometry and composition of the particle and its environment. In this work we describe a method and analysis pipeline unravelling these relations at the single nanoparticle level th...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
RSC
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9419171/ https://www.ncbi.nlm.nih.gov/pubmed/36133358 http://dx.doi.org/10.1039/d0na00059k |
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author | Wang, Yisu Zilli, Attilio Sztranyovszky, Zoltan Langbein, Wolfgang Borri, Paola |
author_facet | Wang, Yisu Zilli, Attilio Sztranyovszky, Zoltan Langbein, Wolfgang Borri, Paola |
author_sort | Wang, Yisu |
collection | PubMed |
description | The optical response of metal nanoparticles is governed by plasmonic resonances, which depend often intricately on the geometry and composition of the particle and its environment. In this work we describe a method and analysis pipeline unravelling these relations at the single nanoparticle level through a quantitative characterization of the optical and structural properties. It is based on correlating electron microscopy with microspectroscopy measurements of the same particle immersed in media of different refractive indices. The optical measurements quantify the magnitude of both the scattering and the absorption cross sections, while the geometry measured in electron microscopy is used for numerical simulations of the cross section spectra accounting for the experimental conditions. We showcase the method on silver nanocubes of nominal 75 nm edge size. The large amount of information afforded by the quantitative cross section spectra and measuring the same particle in two environments, allows us to identify a specific degradation of the cube surface. We find a layer of tarnish, only a few nanometers thick, a fine surface compositional change of the studied system which would be hardly quantifiable otherwise. |
format | Online Article Text |
id | pubmed-9419171 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | RSC |
record_format | MEDLINE/PubMed |
spelling | pubmed-94191712022-09-20 Quantitative optical microspectroscopy, electron microscopy, and modelling of individual silver nanocubes reveal surface compositional changes at the nanoscale Wang, Yisu Zilli, Attilio Sztranyovszky, Zoltan Langbein, Wolfgang Borri, Paola Nanoscale Adv Chemistry The optical response of metal nanoparticles is governed by plasmonic resonances, which depend often intricately on the geometry and composition of the particle and its environment. In this work we describe a method and analysis pipeline unravelling these relations at the single nanoparticle level through a quantitative characterization of the optical and structural properties. It is based on correlating electron microscopy with microspectroscopy measurements of the same particle immersed in media of different refractive indices. The optical measurements quantify the magnitude of both the scattering and the absorption cross sections, while the geometry measured in electron microscopy is used for numerical simulations of the cross section spectra accounting for the experimental conditions. We showcase the method on silver nanocubes of nominal 75 nm edge size. The large amount of information afforded by the quantitative cross section spectra and measuring the same particle in two environments, allows us to identify a specific degradation of the cube surface. We find a layer of tarnish, only a few nanometers thick, a fine surface compositional change of the studied system which would be hardly quantifiable otherwise. RSC 2020-04-22 /pmc/articles/PMC9419171/ /pubmed/36133358 http://dx.doi.org/10.1039/d0na00059k Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/ |
spellingShingle | Chemistry Wang, Yisu Zilli, Attilio Sztranyovszky, Zoltan Langbein, Wolfgang Borri, Paola Quantitative optical microspectroscopy, electron microscopy, and modelling of individual silver nanocubes reveal surface compositional changes at the nanoscale |
title | Quantitative optical microspectroscopy, electron microscopy, and modelling of individual silver nanocubes reveal surface compositional changes at the nanoscale |
title_full | Quantitative optical microspectroscopy, electron microscopy, and modelling of individual silver nanocubes reveal surface compositional changes at the nanoscale |
title_fullStr | Quantitative optical microspectroscopy, electron microscopy, and modelling of individual silver nanocubes reveal surface compositional changes at the nanoscale |
title_full_unstemmed | Quantitative optical microspectroscopy, electron microscopy, and modelling of individual silver nanocubes reveal surface compositional changes at the nanoscale |
title_short | Quantitative optical microspectroscopy, electron microscopy, and modelling of individual silver nanocubes reveal surface compositional changes at the nanoscale |
title_sort | quantitative optical microspectroscopy, electron microscopy, and modelling of individual silver nanocubes reveal surface compositional changes at the nanoscale |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9419171/ https://www.ncbi.nlm.nih.gov/pubmed/36133358 http://dx.doi.org/10.1039/d0na00059k |
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