Deformation behavior of cross-linked supercrystalline nanocomposites: an in situ SAXS/WAXS study during uniaxial compression

Enthalten in
Nano letters 
Volume
21
Issue
7
Start Page
2891
End Page
2897
Citation
Nano letters 21 (7): 2891-2897 (2021-04-14)
Publisher DOI
10.1021/acs.nanolett.0c05041
Scopus ID
2-s2.0-85104275677
PubMed ID
33749275
Publisher
ACS Publ.
Peer Reviewed
true
With the ever-expanding functional applications of supercrystalline nanocomposites (a relatively new category of materials consisting of organically functionalized nanoparticles arranged into periodic structures), it becomes necessary to ensure their structural stability and understand their deformation and failure mechanisms. Inducing the cross-linking of the functionalizing organic ligands, for instance, leads to a remarkable enhancement of the nanocomposites' mechanical properties. It is however still unknown how the cross-linked organic phase redistributes applied loads, how the supercrystalline lattice accommodates the imposed deformations, and thus in general what phenomena govern the overall material's mechanical response. This work elucidates these aspects for cross-linked supercrystalline nanocomposites through an in situ small- and wide-angle X-ray scattering study combined with uniaxial pressing. Because of this loading condition, it emerges that the cross-linked ligands effectively carry and distribute loads homogeneously throughout the nanocomposites, while the superlattice deforms via rotation, slip, and local defects generation.
Schlagworte
Cross-Linking
Mechanical Behavior
Nanocomposites
Nanocrystal Superlattice
Supercrystals
X-ray Scattering
DDC Class
600: Technik
Projekt(e)
SFB 986: Teilprojekt A6 - Herstellung und Charakterisierung hierarchischer, multi-funktionaler Keramik/Metall-Polymer Materialsysteme 
SFB 986: Zentralprojekt Z02 - Untersuchung multiskalig strukturierter Materialsysteme mit Synchrotron- und Neutronenstrahlung 
Funding Organisations
Deutsche Forschungsgemeinschaft (DFG) 
Alexander von Humboldt-Stiftung 
More Funding Information
D.G. gratefully acknowledges the support from the Alexander von Humboldt Foundation. B.B. gratefully acknowledges the support from the Ministry of National Education of the Republic of Turkey.
Publication version
publishedVersion
Lizenz
https://creativecommons.org/licenses/by-nc-nd/4.0/
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