Ordered hierarchical superlattice amplifies coated-CeO 2 nanoparticles luminescence.

Autor: Gallucci N; Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy,; CSGI, Center for Colloid and Surface Science, 50019 Sesto Fiorentino, Italy., Appavou MS; Jülich Center for Neutron Science (JCNS) at Heinz Maier-Leibnitz Zentrum (MLZ), Forschungszentrum Jülich GmbH, Lichtenbergstr. 1, 85748 Garching, Germany., Cowieson N; Diamond Light Source, Didcot, Oxfordshire, England, United Kingdom., D'Errico G; Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy,; CSGI, Center for Colloid and Surface Science, 50019 Sesto Fiorentino, Italy., Di Girolamo R; Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy., Lettieri S; Department of Physics, University of Naples Federico II, Via Cupa Cintia 21, 80126 Naples, Italy., Sica F; Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy., Vitiello G; CSGI, Center for Colloid and Surface Science, 50019 Sesto Fiorentino, Italy; Department of Chemical, Materials and Production Engineering, University of Naples Federico II, 80125 Naples, Italy., Paduano L; Department of Chemical Sciences, University of Naples Federico II, 80126 Naples, Italy,; CSGI, Center for Colloid and Surface Science, 50019 Sesto Fiorentino, Italy. Electronic address: luigi.paduano@unina.it.
Jazyk: angličtina
Zdroj: Journal of colloid and interface science [J Colloid Interface Sci] 2024 Apr; Vol. 659, pp. 926-935. Date of Electronic Publication: 2024 Jan 09.
DOI: 10.1016/j.jcis.2024.01.029
Abstrakt: Achieving a controlled preparation of nanoparticle superstructures with spatially periodic arrangement, also called superlattices, is one of the most intriguing and open questions in soft matter science. The interest in such regular superlattices originates from the potentialities in tailoring the physicochemical properties of the individual constituent nanoparticles, eventually leading to emerging behaviors and/or functionalities that are not exhibited by the initial building blocks. Despite progress, it is currently difficult to obtain such ordered structures; the influence of parameters, such as size, softness, interaction potentials, and entropy, are neither fully understood yet and not sufficiently studied for 3D systems. In this work, we describe the synthesis and characterization of spatially ordered hierarchical structures of coated cerium oxide nanoparticles in water suspension prepared by a bottom-up approach. Covering the CeO 2 surface with amphiphilic molecules having chains of appropriate length makes it possible to form ordered structures in which the particles occupy well-defined positions. In the present case superlattice arrangement is accompanied by an improvement in photoluminescence (PL) efficiency, as an increase in PL intensity of the superlattice structure of up to 400 % compared with that of randomly dispersed nanoparticles was observed. To the best of our knowledge, this is one of the first works in the literature in which the coexistence of 3D structures in solution, such as face-centered cubic (FCC) and Frank-Kasper (FK) phases, of semiconductor nanoparticles have been related to their optical properties.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2024 The Authors. Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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