Strong Macroscale Supercrystalline Structures by 3D Printing Combined with Self‐Assembly of Ceramic Functionalized Nanoparticles
| Autor: | Berta Domènech, Lucio Colombi Ciacchi, A. John Hart, Oliver Focke, Eduardo Zegarra Berodt, Cemal Cem Tasan, Gerold A. Schneider, Kaline Pagnan Furlan, Jaclyn Leigh Cann, Hans Jelitto, Martin Müller, Malte Blankenburg, Alvin T. L. Tan |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Nanocomposite supercrystals business.industry 600: Technik 3D printing Nanotechnology Condensed Matter Physics Functionalized nanoparticles visual_art nanocomposites visual_art.visual_art_medium ddc:660 General Materials Science Ceramic Self-assembly business ddc:600 mechanical strengths Technik [600] colloidal assemblies |
| Zdroj: | Wiley Advanced Engineering Materials 7 (22): 2000352 (2020-07-01) Advanced engineering materials 22(2000352), 1-6 (2020). doi:10.1002/adem.202000352 |
| Popis: | Advanced engineering materials 22(2000352), 1-6 (2020). doi:10.1002/adem.202000352 To translate the exceptional properties of colloidal nanoparticles (NPs) to macroscalegeometries, assembly techniques must bridge a 10$^6$-fold range of length.Moreover, for successfully attaining a final mechanically robust nanocompositemacroscale material, some of the intrinsic NPs’ properties have to be maintainedwhile minimizing the density of strength-limiting defects. However, the assembly ofnanoscale building blocks into macroscopic dimensions, and their effective macroscaleproperties, are inherently affected by the precision of the conditionsrequired for assembly and emergent flaws including point defects, dislocations,grain boundaries, and cracks. Herein, a direct-write self-assembly technique is usedto construct free-standing, millimeter-scale columns comprising spherical ironoxide NPs (15 nm diameter) surface functionalized with oleic acid (OA), which selfassembleinto face-centered cubic (FCC) supercrystals in minutes during the directwritingprocess. The subsequent crosslinking of OA molecules results in nanocompositeswith a maximum strength of 110 MPa and elastic modulus up to58 GPa. These mechanical properties are interpreted according to the flaw sizedistribution and are as high as newly engineered platelet-based nanocomposites.The findings indicate a broad potential to create mechanically robust, multifunctional3D structures by combining additive manufacturing with colloidal assembly. Published by Deutsche Gesellschaft für Materialkunde, Frankfurt, M. |
| Databáze: | OpenAIRE |
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