Datum
2021-10-13Autor
Wang, JunweiSchwenger, JanStröbel, AndreasFeldner, PatrickHerre, PatrickRomeis, StefanPeukert, WolfgangMerle, BenoitVogel, NicolasSchlagwort
620 Ingenieurwissenschaften 660 Chemische Verfahrenstechnik, Technische Chemie PartikelSupramolekülMechanische EigenschaftDeformationsverhaltenMetadata
Zur Langanzeige
Aufsatz
Mechanics of colloidal supraparticles under compression
Zusammenfassung
Colloidal supraparticles are finite, spherical assemblies of many primary particles. To take advantage of their emergent functionalities, such supraparticles must retain their structural integrity. Here, we investigate their size-dependent mechanical properties via nanoindentation. We find that the deformation resistance inversely scales with the primary particle diameter, while the work of deformation is dependent on the supraparticle diameter. We adopt the Griffith theory to such particulate systems to provide a predictive scaling to relate the fracture stress to the geometry of supraparticles. The interplay between primary particle material and cohesive interparticle forces dictates the mechanical properties of supraparticles. We find that enhanced stability, associated with ductile fracture, can be achieved if supraparticles are engineered to dissipate more energy via deformation of primary particles than breaking of interparticle bonds. Our work provides a coherent framework to analyze, predict, and design the mechanical properties of colloidal supraparticles.
Zitierform
In: Science Advances Volume 7 / Issue 42 (2021-10-13) eissn:2375-2548Förderhinweis
This project was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)—Project-ID 416229255—SFB 1411.Zitieren
@article{doi:10.17170/kobra-202307198404,
author={Wang, Junwei and Schwenger, Jan and Ströbel, Andreas and Feldner, Patrick and Herre, Patrick and Romeis, Stefan and Peukert, Wolfgang and Merle, Benoit and Vogel, Nicolas},
title={Mechanics of colloidal supraparticles under compression},
journal={Science Advances},
year={2021}
}
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2023-07-24T14:03:02Z 2023-07-24T14:03:02Z 2021-10-13 doi:10.17170/kobra-202307198404 http://hdl.handle.net/123456789/14919 This project was funded by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation)—Project-ID 416229255—SFB 1411. eng Namensnennung-Nicht-kommerziell 4.0 International http://creativecommons.org/licenses/by-nc/4.0/ 620 660 Mechanics of colloidal supraparticles under compression Aufsatz Colloidal supraparticles are finite, spherical assemblies of many primary particles. To take advantage of their emergent functionalities, such supraparticles must retain their structural integrity. Here, we investigate their size-dependent mechanical properties via nanoindentation. We find that the deformation resistance inversely scales with the primary particle diameter, while the work of deformation is dependent on the supraparticle diameter. We adopt the Griffith theory to such particulate systems to provide a predictive scaling to relate the fracture stress to the geometry of supraparticles. The interplay between primary particle material and cohesive interparticle forces dictates the mechanical properties of supraparticles. We find that enhanced stability, associated with ductile fracture, can be achieved if supraparticles are engineered to dissipate more energy via deformation of primary particles than breaking of interparticle bonds. Our work provides a coherent framework to analyze, predict, and design the mechanical properties of colloidal supraparticles. open access Wang, Junwei Schwenger, Jan Ströbel, Andreas Feldner, Patrick Herre, Patrick Romeis, Stefan Peukert, Wolfgang Merle, Benoit Vogel, Nicolas doi:10.1126/sciadv.abj0954 416229255—SFB 1411 Partikel Supramolekül Mechanische Eigenschaft Deformationsverhalten publishedVersion eissn:2375-2548 Issue 42 Science Advances Volume 7 false eabj0954
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