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| Main Authors: | , , , , , |
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| Format: | Preprint |
| Published: |
2023
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2310.06774 |
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| _version_ | 1866915321947881472 |
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| author | Felsted, Robert G. Chun, Jaehun Schenter, Gregory K. Bard, Alexander B. Xia, Xiaojing Pauzauskie, Peter J. |
| author_facet | Felsted, Robert G. Chun, Jaehun Schenter, Gregory K. Bard, Alexander B. Xia, Xiaojing Pauzauskie, Peter J. |
| contents | Rigorous understanding of the self-assembly of colloidal nanocrystals is crucial to the development of tailored nanostructured materials. Despite extensive studies, a mechanistic understanding of self-assembly under non-equilibrium driven by an external field remains an ongoing challenge. We demonstrate self-assembly by optical tweezers imposing an external attractive field for cubic-phase sodium yttrium fluoride nanocrystals. We show that surface roughness of the nanocrystals is a decisive factor for contact leading to assembly between the nanocrystals, manifested by the roughness-dependent hydrodynamic resistivity. This provides direct evidence that dynamics are equally important to energetics in understanding self-assembly. These results have implications in a wide variety of different fields, such as in understanding the factors that mediate oriented attachment-based crystal growth or in interpreting the structure of binding sites on viruses. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_06774 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Optical assembly of nanostructures mediated by surface roughness Felsted, Robert G. Chun, Jaehun Schenter, Gregory K. Bard, Alexander B. Xia, Xiaojing Pauzauskie, Peter J. Materials Science Rigorous understanding of the self-assembly of colloidal nanocrystals is crucial to the development of tailored nanostructured materials. Despite extensive studies, a mechanistic understanding of self-assembly under non-equilibrium driven by an external field remains an ongoing challenge. We demonstrate self-assembly by optical tweezers imposing an external attractive field for cubic-phase sodium yttrium fluoride nanocrystals. We show that surface roughness of the nanocrystals is a decisive factor for contact leading to assembly between the nanocrystals, manifested by the roughness-dependent hydrodynamic resistivity. This provides direct evidence that dynamics are equally important to energetics in understanding self-assembly. These results have implications in a wide variety of different fields, such as in understanding the factors that mediate oriented attachment-based crystal growth or in interpreting the structure of binding sites on viruses. |
| title | Optical assembly of nanostructures mediated by surface roughness |
| topic | Materials Science |
| url | https://arxiv.org/abs/2310.06774 |