| Autor: |
Torres-Díaz I; Chemical & Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA. mabevan@jhu.edu., Hendley RS; Chemical & Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA. mabevan@jhu.edu., Mishra A; Chemical & Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA. mabevan@jhu.edu., Yeh AJ; Chemical & Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA. mabevan@jhu.edu., Bevan MA; Chemical & Biomolecular Engineering, Johns Hopkins University, Baltimore, MD 21218, USA. mabevan@jhu.edu. |
| Jazyk: |
angličtina |
| Zdroj: |
Soft matter [Soft Matter] 2022 Feb 09; Vol. 18 (6), pp. 1319-1330. Date of Electronic Publication: 2022 Feb 09. |
| DOI: |
10.1039/d1sm01523k |
| Abstrakt: |
We report computer simulations of two-dimensional convex hard superellipse particle phases vs. particle shape parameters including aspect ratio, corner curvature, and sidewall curvature. Shapes investigated include disks, ellipses, squares, rectangles, and rhombuses, as well as shapes with non-uniform curvature including rounded squares, rounded rectangles, and rounded rhombuses. Using measures of orientational order, order parameters, and a novel stretched bond orientational order parameter, we systematically identify particle shape properties that determine liquid crystal and crystalline phases including their coarse boundaries and symmetry. We observe phases including isotropic, nematic, tetratic, plastic crystals, square crystals, and hexagonal crystals (including stretched variants). Our results catalog known benchmark shapes, but include new shapes that also interpolate between known shapes. Our results indicate design rules for particle shapes that determine two-dimensional liquid, liquid crystalline, and crystalline microstructures that can be realized via particle assembly. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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