Sessile Nanodroplets on Elliptical Patches of Enhanced Lyophilicity
| Autor: | Dević, Ivan, Soligno, Giuseppe, Dijkstra, Marjolein, Roij, René van, Zhang, Xuehua, Lohse, Detlef, Sub Cond-Matter Theory, Stat & Comp Phys, Sub Soft Condensed Matter, Debye Institute, Theoretical Physics |
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| Přispěvatelé: | Physics of Fluids, Sub Cond-Matter Theory, Stat & Comp Phys, Sub Soft Condensed Matter, Debye Institute, Theoretical Physics |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Surface (mathematics)
Monte Carlo method 02 engineering and technology Substrate (electronics) 010402 general chemistry Ellipse Curvature 01 natural sciences Article Contact angle Optics Materials Science(all) Taverne Electrochemistry Physics::Atomic and Molecular Clusters General Materials Science Spectroscopy Chemistry business.industry Contact line Surfaces and Interfaces Mechanics 021001 nanoscience & nanotechnology Condensed Matter Physics Aspect ratio (image) 0104 chemical sciences 0210 nano-technology business |
| Zdroj: | Langmuir, 33(11), 2744. American Chemical Society : Division of Carbohydrate Chemistry Langmuir Langmuir, 33(11), 2744-2749. American Chemical Society |
| ISSN: | 0743-7463 |
| Popis: | We theoretically investigate the shape of a nanodroplet on a lyophilic elliptical patch in lyophobic surroundings on a flat substrate. To compute the droplet equilibrium shape, we minimize its interfacial free energy using both Surface Evolver and Monte Carlo calculations, finding good agreement between the two methods. We observe different droplet shapes, which are controlled by the droplet volume and the aspect ratio of the ellipse. In particular, we study the behavior of the nanodroplet contact angle along the three-phase contact line, explaining the different droplet shapes. Although the nanodroplet contact angle is constant and fixed by Young’s law inside and outside the elliptical patch, its value varies along the rim of the elliptical patch. We find that because of the pinning of the nanodroplet contact line at the rim of the elliptical patch, which has a nonconstant curvature, there is a regime of aspect ratios of the elliptical patch in which the nanodroplet starts expanding to the lyophobic part of the substrate, although there is still a finite area of the lyophilic patch free to be wetted. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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