Hierarchical Self-Assembly of Dipolar ZnO Nanoparticles and Microdroplets

Autor:	Najla Ghifari, Rachid Bennacer, Adil Chahboun, Abdel I. El Abed
Jazyk:	angličtina
Rok vydání:	2022
Předmět:	droplets microfluidics meso-crystallization ZnO nanoparticles dipolar electric interaction tip-streaming effect Mechanical engineering and machinery TJ1-1570
Zdroj:	Micromachines, Vol 13, Iss 9, p 1522 (2022)
Druh dokumentu:	article
ISSN:	13091522 2072-666X
DOI:	10.3390/mi13091522
Popis:	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.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/ddcfd6e53c624138b4b3e485f071665a Zobrazit plný text záznamu View record in DOAJ