Light-Sculpted Azopolymer Colloids: From Patchy Spheres to Porcupine and Pineapple Morphologies
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arXiv
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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2026
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| _version_ | 1866917372792668160 |
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| author | Sorkhabi, Sh. Golghasemi Barille, R. Loumaigne, M. Korbut, A. Zielinska, S. Ortyl, E. |
| author_facet | Sorkhabi, Sh. Golghasemi Barille, R. Loumaigne, M. Korbut, A. Zielinska, S. Ortyl, E. |
| contents | A simple optical strategy to transform patchy PMMA azopolymer composite nanoparticles into complex, fully three-dimensional morphologies using controlled laser polarization is presented. The particles consist of a PMMA core decorated with nanoscale azopolymer patches that undergo localized photofluidization upon trans cis isomerization. Linear polarization drives directed mass transport within each patch, producing elongated super-cones that collectively yield porcupine like particles, whereas circular polarization generates isotropic bump deformations reminiscent of sea-pineapple structures. A nonlinear, volume-conserving geometric model quantitatively reproduces the patch-to-filament transition. Brownian and Jeffery-flow simulations reveal that these photoinduced morphologies dramatically alter hydrodynamic behavior, leading to enhanced anisotropic diffusion, reduced rotational randomization, and polarization-dependent transport amplification in shear flow. This light-driven, reversible sculpting method provides a versatile route to programmable colloidal shapes and highlights geometry as a powerful control parameter for microscale transport, active materials, and soft-matter physics. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_29310 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Light-Sculpted Azopolymer Colloids: From Patchy Spheres to Porcupine and Pineapple Morphologies Sorkhabi, Sh. Golghasemi Barille, R. Loumaigne, M. Korbut, A. Zielinska, S. Ortyl, E. Applied Physics A simple optical strategy to transform patchy PMMA azopolymer composite nanoparticles into complex, fully three-dimensional morphologies using controlled laser polarization is presented. The particles consist of a PMMA core decorated with nanoscale azopolymer patches that undergo localized photofluidization upon trans cis isomerization. Linear polarization drives directed mass transport within each patch, producing elongated super-cones that collectively yield porcupine like particles, whereas circular polarization generates isotropic bump deformations reminiscent of sea-pineapple structures. A nonlinear, volume-conserving geometric model quantitatively reproduces the patch-to-filament transition. Brownian and Jeffery-flow simulations reveal that these photoinduced morphologies dramatically alter hydrodynamic behavior, leading to enhanced anisotropic diffusion, reduced rotational randomization, and polarization-dependent transport amplification in shear flow. This light-driven, reversible sculpting method provides a versatile route to programmable colloidal shapes and highlights geometry as a powerful control parameter for microscale transport, active materials, and soft-matter physics. |
| title | Light-Sculpted Azopolymer Colloids: From Patchy Spheres to Porcupine and Pineapple Morphologies |
| topic | Applied Physics |
| url | https://arxiv.org/abs/2603.29310 |