Superlattice growth and rearrangement during evaporation-induced nanoparticle self-assembly

Abstract Understanding the assembly of nanoparticles into superlattices with well-defined morphology and structure is technologically important but challenging as it requires novel combinations of in-situ methods with suitable spatial and temporal resolution. In this study, we have followed evaporat...

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Autores principales:	Elisabeth Josten, Erik Wetterskog, Artur Glavic, Peter Boesecke, Artem Feoktystov, Elke Brauweiler-Reuters, Ulrich Rücker, German Salazar-Alvarez, Thomas Brückel, Lennart Bergström
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/589fbbd5458e4c57ada8af2e814fe8f2
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spelling	oai:doaj.org-article:589fbbd5458e4c57ada8af2e814fe8f22021-12-02T12:32:41ZSuperlattice growth and rearrangement during evaporation-induced nanoparticle self-assembly10.1038/s41598-017-02121-42045-2322https://doaj.org/article/589fbbd5458e4c57ada8af2e814fe8f22017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02121-4https://doaj.org/toc/2045-2322Abstract Understanding the assembly of nanoparticles into superlattices with well-defined morphology and structure is technologically important but challenging as it requires novel combinations of in-situ methods with suitable spatial and temporal resolution. In this study, we have followed evaporation-induced assembly during drop casting of superparamagnetic, oleate-capped γ-Fe2O3 nanospheres dispersed in toluene in real time with Grazing Incidence Small Angle X-ray Scattering (GISAXS) in combination with droplet height measurements and direct observation of the dispersion. The scattering data was evaluated with a novel method that yielded time-dependent information of the relative ratio of ordered (coherent) and disordered particles (incoherent scattering intensities), superlattice tilt angles, lattice constants, and lattice constant distributions. We find that the onset of superlattice growth in the drying drop is associated with the movement of a drying front across the surface of the droplet. We couple the rapid formation of large, highly ordered superlattices to the capillary-induced fluid flow. Further evaporation of interstitital solvent results in a slow contraction of the superlattice. The distribution of lattice parameters and tilt angles was significantly larger for superlattices prepared by fast evaporation compared to slow evaporation of the solvent.Elisabeth JostenErik WetterskogArtur GlavicPeter BoeseckeArtem FeoktystovElke Brauweiler-ReutersUlrich RückerGerman Salazar-AlvarezThomas BrückelLennart BergströmNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Elisabeth Josten Erik Wetterskog Artur Glavic Peter Boesecke Artem Feoktystov Elke Brauweiler-Reuters Ulrich Rücker German Salazar-Alvarez Thomas Brückel Lennart Bergström Superlattice growth and rearrangement during evaporation-induced nanoparticle self-assembly
description	Abstract Understanding the assembly of nanoparticles into superlattices with well-defined morphology and structure is technologically important but challenging as it requires novel combinations of in-situ methods with suitable spatial and temporal resolution. In this study, we have followed evaporation-induced assembly during drop casting of superparamagnetic, oleate-capped γ-Fe2O3 nanospheres dispersed in toluene in real time with Grazing Incidence Small Angle X-ray Scattering (GISAXS) in combination with droplet height measurements and direct observation of the dispersion. The scattering data was evaluated with a novel method that yielded time-dependent information of the relative ratio of ordered (coherent) and disordered particles (incoherent scattering intensities), superlattice tilt angles, lattice constants, and lattice constant distributions. We find that the onset of superlattice growth in the drying drop is associated with the movement of a drying front across the surface of the droplet. We couple the rapid formation of large, highly ordered superlattices to the capillary-induced fluid flow. Further evaporation of interstitital solvent results in a slow contraction of the superlattice. The distribution of lattice parameters and tilt angles was significantly larger for superlattices prepared by fast evaporation compared to slow evaporation of the solvent.
format	article
author	Elisabeth Josten Erik Wetterskog Artur Glavic Peter Boesecke Artem Feoktystov Elke Brauweiler-Reuters Ulrich Rücker German Salazar-Alvarez Thomas Brückel Lennart Bergström
author_facet	Elisabeth Josten Erik Wetterskog Artur Glavic Peter Boesecke Artem Feoktystov Elke Brauweiler-Reuters Ulrich Rücker German Salazar-Alvarez Thomas Brückel Lennart Bergström
author_sort	Elisabeth Josten
title	Superlattice growth and rearrangement during evaporation-induced nanoparticle self-assembly
title_short	Superlattice growth and rearrangement during evaporation-induced nanoparticle self-assembly
title_full	Superlattice growth and rearrangement during evaporation-induced nanoparticle self-assembly
title_fullStr	Superlattice growth and rearrangement during evaporation-induced nanoparticle self-assembly
title_full_unstemmed	Superlattice growth and rearrangement during evaporation-induced nanoparticle self-assembly
title_sort	superlattice growth and rearrangement during evaporation-induced nanoparticle self-assembly
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/589fbbd5458e4c57ada8af2e814fe8f2
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_version_	1718393979264827392

Superlattice growth and rearrangement during evaporation-induced nanoparticle self-assembly

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