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| Main Authors: | , , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2409.07443 |
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| _version_ | 1866917773907591168 |
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| author | Eatson, Jack Bauernfeind, Susann Midtvedt, Benjamin Ciarlo, Antonio Menath, Johannes Pesce, Giuseppe Schofield, Andrew B. Volpe, Giovanni Clegg, Paul S. Vogel, Nicolas Buzza, D. Martin. A. Rey, Marcel |
| author_facet | Eatson, Jack Bauernfeind, Susann Midtvedt, Benjamin Ciarlo, Antonio Menath, Johannes Pesce, Giuseppe Schofield, Andrew B. Volpe, Giovanni Clegg, Paul S. Vogel, Nicolas Buzza, D. Martin. A. Rey, Marcel |
| contents | Ellipsoidal particles confined at liquid interfaces exhibit complex self-assembly behaviour due to quadrupolar capillary interactions induced by meniscus deformation. These interactions cause particles to attract each other in either tip-to-tip or side-to-side configurations. However, controlling their interfacial self-assembly is challenging because it is difficult to predict which of these two states will be preferred. In this study, we demonstrate that introducing a soft shell around hard ellipsoidal particles provides a means to control the self-assembly process, allowing us to switch the preferred configuration between these states. We study their interfacial self-assembly and find that pure ellipsoids without a shell consistently form a "chain-like" side-to-side assembly, regardless of aspect ratio. In contrast, core-shell ellipsoids transition from "flower-like" tip-to-tip to "chain-like" side-to-side arrangements as their aspect ratios increase. The critical aspect ratio for transitioning between these structures increases with shell-to-core ratios. Our experimental findings are corroborated by theoretical calculations and Monte Carlo simulations, which map out the phase diagram of thermodynamically preferred self-assembly structures for core-shell ellipsoids as a function of aspect ratio and shell-to-core ratios. This study shows how to program the self-assembly of anisotropic particles by tuning their physicochemical properties, allowing the deterministic realization of distinct structural configurations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2409_07443 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Programmable self-assembly of core-shell ellipsoids at liquid interfaces Eatson, Jack Bauernfeind, Susann Midtvedt, Benjamin Ciarlo, Antonio Menath, Johannes Pesce, Giuseppe Schofield, Andrew B. Volpe, Giovanni Clegg, Paul S. Vogel, Nicolas Buzza, D. Martin. A. Rey, Marcel Soft Condensed Matter Ellipsoidal particles confined at liquid interfaces exhibit complex self-assembly behaviour due to quadrupolar capillary interactions induced by meniscus deformation. These interactions cause particles to attract each other in either tip-to-tip or side-to-side configurations. However, controlling their interfacial self-assembly is challenging because it is difficult to predict which of these two states will be preferred. In this study, we demonstrate that introducing a soft shell around hard ellipsoidal particles provides a means to control the self-assembly process, allowing us to switch the preferred configuration between these states. We study their interfacial self-assembly and find that pure ellipsoids without a shell consistently form a "chain-like" side-to-side assembly, regardless of aspect ratio. In contrast, core-shell ellipsoids transition from "flower-like" tip-to-tip to "chain-like" side-to-side arrangements as their aspect ratios increase. The critical aspect ratio for transitioning between these structures increases with shell-to-core ratios. Our experimental findings are corroborated by theoretical calculations and Monte Carlo simulations, which map out the phase diagram of thermodynamically preferred self-assembly structures for core-shell ellipsoids as a function of aspect ratio and shell-to-core ratios. This study shows how to program the self-assembly of anisotropic particles by tuning their physicochemical properties, allowing the deterministic realization of distinct structural configurations. |
| title | Programmable self-assembly of core-shell ellipsoids at liquid interfaces |
| topic | Soft Condensed Matter |
| url | https://arxiv.org/abs/2409.07443 |