title: Interaction of 3D dewetting nanodroplets on homogeneous and chemically heterogeneous substrates.
abstract: Long-time interaction of dewetting nanodroplets is investigated using a long-wave approximation method. Although three-dimensional (3D) droplets evolution dynamics exhibits qualitative behavior analogous to two-dimensional (2D) dynamics, there is an extensive quantitative difference between them. 3D dynamics is substantially faster than 2D dynamics. This can be related to the larger curvature and, as a consequence, the larger Laplace pressure difference between the droplets in 3D systems. The influence of various chemical heterogeneities on the behavior of droplets has also been studied. In the case of gradient surfaces, it is shown how the gradient direction could change the dynamics. For a chemical step located between the droplets, the dynamics is enhanced or weakened depending on the initial configuration of the system.
authors.affiliation: Center of Excellence in Energy Conversion (CEEC), School of Mechanical Engineering, Sharif University of Technology, Azadi Avenue, PO Box 11365-9567 Tehran, Iran.
authors.forename: M
authors.initials: M
authors.lastname: Asgari
authors.forename: A
authors.initials: A
authors.lastname: Moosavi
mesh_terms: D003198:Computer Simulation; D004058:Diffusion; D057446:Hydrodynamics; D057927:Hydrophobic and Hydrophilic Interactions; D008567:Membranes, Artificial; D044085:Microfluidics / Q000379:methods*; D008956:Models, Chemical; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D010316:Particle Size; D017155:Wettability
chemical_list: D008567:Membranes, Artificial