Mechanical instability generates monodisperse colloidosomes
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866912697739640832 |
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| author | Shin, Seungwoo Cao, Federico Pelcovits, Robert A. Powers, Thomas R. Dogic, Zvonimir |
| author_facet | Shin, Seungwoo Cao, Federico Pelcovits, Robert A. Powers, Thomas R. Dogic, Zvonimir |
| contents | Formation and rupture of vesicles is a fundamental process underlying diverse phenomena in biology, materials science, and biomedical applications. Vesicles form when the area of a growing disk-like membrane exceeds a critical value at which the edge and bending energies balance each other. Observing such topological transitions in lipid bilayers is a challenge because of their nanoscale dimensions and rapid dynamics. We study a scaled-up model of colloidal membranes assembled from rod-shaped colloidal particles. The unique features of colloidal membranes enable the real-time visualization of spontaneous closure driven by instability relevant to all membrane-based materials. First-principles theory quantitatively predicts the instability point for vesicle formation and intermediate membrane conformations during the disk-to-vesicle transition. The instability generates monodisperse, selectively permeable colloidosomes with size controlled by gravity and membrane thickness, providing a scalable and programmable platform for diverse applications. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2511_06588 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Mechanical instability generates monodisperse colloidosomes Shin, Seungwoo Cao, Federico Pelcovits, Robert A. Powers, Thomas R. Dogic, Zvonimir Soft Condensed Matter Formation and rupture of vesicles is a fundamental process underlying diverse phenomena in biology, materials science, and biomedical applications. Vesicles form when the area of a growing disk-like membrane exceeds a critical value at which the edge and bending energies balance each other. Observing such topological transitions in lipid bilayers is a challenge because of their nanoscale dimensions and rapid dynamics. We study a scaled-up model of colloidal membranes assembled from rod-shaped colloidal particles. The unique features of colloidal membranes enable the real-time visualization of spontaneous closure driven by instability relevant to all membrane-based materials. First-principles theory quantitatively predicts the instability point for vesicle formation and intermediate membrane conformations during the disk-to-vesicle transition. The instability generates monodisperse, selectively permeable colloidosomes with size controlled by gravity and membrane thickness, providing a scalable and programmable platform for diverse applications. |
| title | Mechanical instability generates monodisperse colloidosomes |
| topic | Soft Condensed Matter |
| url | https://arxiv.org/abs/2511.06588 |