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Hierarchical Self-Assembly of Dipolar ZnO Nanoparticles and Microdroplets

In this work, we investigated the orientation and the polarization of ZnO nanoparticles, which serve as building blocks of highly monodisperse microspheres, using a droplet microfluidic-assisted synthesis method. We observe, for the first time, a square lattice organization of liquid microdroplets,...

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Detalles Bibliográficos
Autores principales: Ghifari, Najla, Bennacer, Rachid, Chahboun, Adil, El Abed, Abdel I.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9502180/
https://www.ncbi.nlm.nih.gov/pubmed/36144145
http://dx.doi.org/10.3390/mi13091522
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author Ghifari, Najla
Bennacer, Rachid
Chahboun, Adil
El Abed, Abdel I.
author_facet Ghifari, Najla
Bennacer, Rachid
Chahboun, Adil
El Abed, Abdel I.
author_sort Ghifari, Najla
collection PubMed
description In this work, we investigated the orientation and the polarization of ZnO nanoparticles, which serve as building blocks of highly monodisperse microspheres, using a droplet microfluidic-assisted synthesis method. We observe, for the first time, a square lattice organization of liquid microdroplets, in a steady state, at the oil/water interface. Such square organization reveals clearly a dipolar organization of ZnO nanoparticles at the surfaces of droplets at the early stage of ZnO nanocrystal aggregation and microsphere formation. We discuss different models of organization of ZnO nanoparticles and show that the well-known tip-streaming effect in droplets in microfluidics explains the reason for the obtained dipolar droplets. The square organization is illustrated and explained.
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spelling pubmed-95021802022-09-24 Hierarchical Self-Assembly of Dipolar ZnO Nanoparticles and Microdroplets Ghifari, Najla Bennacer, Rachid Chahboun, Adil El Abed, Abdel I. Micromachines (Basel) Article In this work, we investigated the orientation and the polarization of ZnO nanoparticles, which serve as building blocks of highly monodisperse microspheres, using a droplet microfluidic-assisted synthesis method. We observe, for the first time, a square lattice organization of liquid microdroplets, in a steady state, at the oil/water interface. Such square organization reveals clearly a dipolar organization of ZnO nanoparticles at the surfaces of droplets at the early stage of ZnO nanocrystal aggregation and microsphere formation. We discuss different models of organization of ZnO nanoparticles and show that the well-known tip-streaming effect in droplets in microfluidics explains the reason for the obtained dipolar droplets. The square organization is illustrated and explained. MDPI 2022-09-14 /pmc/articles/PMC9502180/ /pubmed/36144145 http://dx.doi.org/10.3390/mi13091522 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/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 (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Ghifari, Najla
Bennacer, Rachid
Chahboun, Adil
El Abed, Abdel I.
Hierarchical Self-Assembly of Dipolar ZnO Nanoparticles and Microdroplets
title Hierarchical Self-Assembly of Dipolar ZnO Nanoparticles and Microdroplets
title_full Hierarchical Self-Assembly of Dipolar ZnO Nanoparticles and Microdroplets
title_fullStr Hierarchical Self-Assembly of Dipolar ZnO Nanoparticles and Microdroplets
title_full_unstemmed Hierarchical Self-Assembly of Dipolar ZnO Nanoparticles and Microdroplets
title_short Hierarchical Self-Assembly of Dipolar ZnO Nanoparticles and Microdroplets
title_sort hierarchical self-assembly of dipolar zno nanoparticles and microdroplets
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9502180/
https://www.ncbi.nlm.nih.gov/pubmed/36144145
http://dx.doi.org/10.3390/mi13091522
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