This title appears in the Scientific Report :
2020
Please use the identifier:
http://hdl.handle.net/2128/25312 in citations.
Please use the identifier: http://dx.doi.org/10.1039/D0NH00117A in citations.
Strong size selectivity in the self-assembly of rounded nanocubes into 3D mesocrystals
Strong size selectivity in the self-assembly of rounded nanocubes into 3D mesocrystals
The self-assembly of nanoparticles into highly ordered crystals is largely influenced by variations in the size and shape of the constituent particles, with crystallization generally not observed if their polydispersity is too large. Here, we report on size selectivity in the self-assembly of rounde...
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Personal Name(s): | Josten, Elisabeth (Corresponding author) |
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Angst, Manuel / Glavic, Artur / Zakalek, Paul / Rücker, Ulrich / Seeck, Oliver H. / Kovács, András / Wetterskog, Erik / Kentzinger, Emmanuel / Dunin-Borkowski, Rafal E. / Bergström, Lennart / Brückel, Thomas | |
Contributing Institute: |
Physik Nanoskaliger Systeme; ER-C-1 Streumethoden; JCNS-2 Mikrostrukturforschung; PGI-5 |
Published in: | Nanoscale horizons, 5 (2020) 7, S. 1065-1072 |
Imprint: |
Cambridge
Royal Society of Chemistry
2020
|
PubMed ID: |
32542274 |
DOI: |
10.1039/D0NH00117A |
Document Type: |
Journal Article |
Research Program: |
Controlling Configuration-Based Phenomena Controlling Collective States |
Link: |
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Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1039/D0NH00117A in citations.
The self-assembly of nanoparticles into highly ordered crystals is largely influenced by variations in the size and shape of the constituent particles, with crystallization generally not observed if their polydispersity is too large. Here, we report on size selectivity in the self-assembly of rounded cubic maghemite nanoparticles into three-dimensional mesocrystals. Different X-ray scattering techniques are used to study and compare a nanoparticle dispersion that is used later for self-assembly, an ensemble of mesocrystals grown on a substrate, as well as an individual mesocrystal. The individual μm-sized mesocrystal is isolated using a focused-ion-beam-based technique and investigated by the diffraction of a micro-focused X-ray beam. Structural analysis reveals that individual mesocrystals have a drastically smaller size dispersity of nanoparticles than that in the initial dispersion, implying very strong size selectivity during self-assembly. The small size dispersity of the nanoparticles within individual mesocrystals is accompanied by a very narrow lattice parameter distribution. In contrast, the lattice parameter distribution within all mesocrystals of an ensemble is about four times wider than that of individual mesocrystals, indicating significant size fractionalization between mesocrystals during self-assembly. The small size dispersity within each mesocrystal has important implications for their physical properties. |