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Towards Polymeric Nanoparticles with Multiple Magnetic Patches

Fabricating future materials by self-assembly of nano-building blocks programmed to generate specific lattices is among the most challenging goals of nanotechnology and has led to the recent concept of patchy particles. We report here a simple strategy to fabricate polystyrene nanoparticles with sev...

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Autores principales: Yammine, Elham, Adumeau, Laurent, Abboud, Maher, Mornet, Stéphane, Nakhl, Michel, Duguet, Etienne
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7827819/
https://www.ncbi.nlm.nih.gov/pubmed/33435290
http://dx.doi.org/10.3390/nano11010147
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author Yammine, Elham
Adumeau, Laurent
Abboud, Maher
Mornet, Stéphane
Nakhl, Michel
Duguet, Etienne
author_facet Yammine, Elham
Adumeau, Laurent
Abboud, Maher
Mornet, Stéphane
Nakhl, Michel
Duguet, Etienne
author_sort Yammine, Elham
collection PubMed
description Fabricating future materials by self-assembly of nano-building blocks programmed to generate specific lattices is among the most challenging goals of nanotechnology and has led to the recent concept of patchy particles. We report here a simple strategy to fabricate polystyrene nanoparticles with several silica patches based on the solvent-induced self-assembly of silica/polystyrene monopods. The latter are obtained with morphological yields as high as 99% by seed-growth emulsion polymerization of styrene in the presence of 100 nm silica seeds previously modified with an optimal surface density of methacryloxymethyl groups. In addition, we fabricate “magnetic” silica seeds by silica encapsulation of preformed maghemite supraparticles. The polystyrene pod, i.e., surface nodule, serves as a sticky point when the monopods are incubated in a bad/good solvent mixture for polystyrene, e.g., ethanol/tetrahydrofuran mixtures. After self-assembly, mixtures of particles with two, three, four silica or magnetic silica patches are mainly obtained. The influence of experimental parameters such as the ethanol/tetrahydrofuran volume ratio, monopod concentration and incubation time is studied. Further developments would consist of obtaining pure batches by centrifugal sorting and optimizing the relative position of the patches in conventional repulsion figures.
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spelling pubmed-78278192021-01-25 Towards Polymeric Nanoparticles with Multiple Magnetic Patches Yammine, Elham Adumeau, Laurent Abboud, Maher Mornet, Stéphane Nakhl, Michel Duguet, Etienne Nanomaterials (Basel) Article Fabricating future materials by self-assembly of nano-building blocks programmed to generate specific lattices is among the most challenging goals of nanotechnology and has led to the recent concept of patchy particles. We report here a simple strategy to fabricate polystyrene nanoparticles with several silica patches based on the solvent-induced self-assembly of silica/polystyrene monopods. The latter are obtained with morphological yields as high as 99% by seed-growth emulsion polymerization of styrene in the presence of 100 nm silica seeds previously modified with an optimal surface density of methacryloxymethyl groups. In addition, we fabricate “magnetic” silica seeds by silica encapsulation of preformed maghemite supraparticles. The polystyrene pod, i.e., surface nodule, serves as a sticky point when the monopods are incubated in a bad/good solvent mixture for polystyrene, e.g., ethanol/tetrahydrofuran mixtures. After self-assembly, mixtures of particles with two, three, four silica or magnetic silica patches are mainly obtained. The influence of experimental parameters such as the ethanol/tetrahydrofuran volume ratio, monopod concentration and incubation time is studied. Further developments would consist of obtaining pure batches by centrifugal sorting and optimizing the relative position of the patches in conventional repulsion figures. MDPI 2021-01-09 /pmc/articles/PMC7827819/ /pubmed/33435290 http://dx.doi.org/10.3390/nano11010147 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Yammine, Elham
Adumeau, Laurent
Abboud, Maher
Mornet, Stéphane
Nakhl, Michel
Duguet, Etienne
Towards Polymeric Nanoparticles with Multiple Magnetic Patches
title Towards Polymeric Nanoparticles with Multiple Magnetic Patches
title_full Towards Polymeric Nanoparticles with Multiple Magnetic Patches
title_fullStr Towards Polymeric Nanoparticles with Multiple Magnetic Patches
title_full_unstemmed Towards Polymeric Nanoparticles with Multiple Magnetic Patches
title_short Towards Polymeric Nanoparticles with Multiple Magnetic Patches
title_sort towards polymeric nanoparticles with multiple magnetic patches
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7827819/
https://www.ncbi.nlm.nih.gov/pubmed/33435290
http://dx.doi.org/10.3390/nano11010147
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