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Optimization of Optical Absorption of Colloids of SiO(2)@Au and Fe(3)O(4)@Au Nanoparticles with Constraints

We study the optical response of monodisperse colloids of core-shell plasmonic nanoparticles and introduce a computational approach to optimize absorption for photothermal applications that require dilute colloids of non-interacting particles with a prescribed volume fraction. Since the volume fract...

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Detalles Bibliográficos
Autores principales: Xue, Xiaozheng, Sukhotskiy, Viktor, Furlani, Edward P.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5081514/
https://www.ncbi.nlm.nih.gov/pubmed/27786279
http://dx.doi.org/10.1038/srep35911
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author Xue, Xiaozheng
Sukhotskiy, Viktor
Furlani, Edward P.
author_facet Xue, Xiaozheng
Sukhotskiy, Viktor
Furlani, Edward P.
author_sort Xue, Xiaozheng
collection PubMed
description We study the optical response of monodisperse colloids of core-shell plasmonic nanoparticles and introduce a computational approach to optimize absorption for photothermal applications that require dilute colloids of non-interacting particles with a prescribed volume fraction. Since the volume fraction is held constant, the particle concentration is size-dependent. Optimization is achieved by comparing the absorption spectra of colloids as a function of particle size and structure. We demonstrate the approach via application to colloids of core-shell SiO(2)@Au and Fe(3)O(4)@Au nanoparticles with particle sizes that range from 5–100 nm and with the incident wavelength varying from 600–1200 nm. The absorption spectra are predicted using Mie theory and the analysis shows that there is a unique mix of parameters (core radius, shell thickness, wavelength) that maximize absorption, independent of the value of volume fraction. We show that lossy Fe(3)O(4) cores produce a much broader absorption peak with much less sensitivity to variations in particle structure and wavelength than lossless SiO(2) cores. This approach can be readily adapted to colloids of nanoparticles with arbitrary materials, shapes and structure using appropriate numerical methods to compute the absorption spectra. As such, it is useful for the rational design of colloids and process variables for a broad range of photothermal applications.
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spelling pubmed-50815142016-10-31 Optimization of Optical Absorption of Colloids of SiO(2)@Au and Fe(3)O(4)@Au Nanoparticles with Constraints Xue, Xiaozheng Sukhotskiy, Viktor Furlani, Edward P. Sci Rep Article We study the optical response of monodisperse colloids of core-shell plasmonic nanoparticles and introduce a computational approach to optimize absorption for photothermal applications that require dilute colloids of non-interacting particles with a prescribed volume fraction. Since the volume fraction is held constant, the particle concentration is size-dependent. Optimization is achieved by comparing the absorption spectra of colloids as a function of particle size and structure. We demonstrate the approach via application to colloids of core-shell SiO(2)@Au and Fe(3)O(4)@Au nanoparticles with particle sizes that range from 5–100 nm and with the incident wavelength varying from 600–1200 nm. The absorption spectra are predicted using Mie theory and the analysis shows that there is a unique mix of parameters (core radius, shell thickness, wavelength) that maximize absorption, independent of the value of volume fraction. We show that lossy Fe(3)O(4) cores produce a much broader absorption peak with much less sensitivity to variations in particle structure and wavelength than lossless SiO(2) cores. This approach can be readily adapted to colloids of nanoparticles with arbitrary materials, shapes and structure using appropriate numerical methods to compute the absorption spectra. As such, it is useful for the rational design of colloids and process variables for a broad range of photothermal applications. Nature Publishing Group 2016-10-27 /pmc/articles/PMC5081514/ /pubmed/27786279 http://dx.doi.org/10.1038/srep35911 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Xue, Xiaozheng
Sukhotskiy, Viktor
Furlani, Edward P.
Optimization of Optical Absorption of Colloids of SiO(2)@Au and Fe(3)O(4)@Au Nanoparticles with Constraints
title Optimization of Optical Absorption of Colloids of SiO(2)@Au and Fe(3)O(4)@Au Nanoparticles with Constraints
title_full Optimization of Optical Absorption of Colloids of SiO(2)@Au and Fe(3)O(4)@Au Nanoparticles with Constraints
title_fullStr Optimization of Optical Absorption of Colloids of SiO(2)@Au and Fe(3)O(4)@Au Nanoparticles with Constraints
title_full_unstemmed Optimization of Optical Absorption of Colloids of SiO(2)@Au and Fe(3)O(4)@Au Nanoparticles with Constraints
title_short Optimization of Optical Absorption of Colloids of SiO(2)@Au and Fe(3)O(4)@Au Nanoparticles with Constraints
title_sort optimization of optical absorption of colloids of sio(2)@au and fe(3)o(4)@au nanoparticles with constraints
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5081514/
https://www.ncbi.nlm.nih.gov/pubmed/27786279
http://dx.doi.org/10.1038/srep35911
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