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Publisher DOI: 10.1021/acs.nanolett.0c05041
Title: Deformation behavior of cross-linked supercrystalline nanocomposites: an in situ SAXS/WAXS study during uniaxial compression
Language: English
Authors: Giuntini, Diletta 
Davydok, Anton 
Blankenburg, Malte 
Domènech Garcia, Berta 
Bor, Büsra 
Li, Mingjing 
Scheider, Ingo 
Krywka, Christina 
Müller, Martin 
Schneider, Gerold A. 
Keywords: Cross-Linking;Mechanical Behavior;Nanocomposites;Nanocrystal Superlattice;Supercrystals;X-ray Scattering
Issue Date: 22-Mar-2021
Publisher: ACS Publ.
Source: Nano letters 21 (7): 2891-2897 (2021-04-14)
Journal or Series Name: Nano letters 
Abstract (english): 
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.
DOI: 10.15480/882.3499
ISSN: 1530-6984
Institute: Keramische Hochleistungswerkstoffe M-9 
Document Type: Article
Funded by: 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.
Peer Reviewed: Yes
Project: SFB 986: Maßgeschneiderte Multiskalige Materialsysteme - M3 
License: CC BY-NC-ND 4.0 (Attribution-NonCommercial-NoDerivatives) CC BY-NC-ND 4.0 (Attribution-NonCommercial-NoDerivatives)
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