Current browse context:
physics.flu-dyn
Change to browse by:
References & Citations
Physics > Fluid Dynamics
Title: Triboelectrically mediated self-assembly and manipulation of drops at an interface
(Submitted on 21 Mar 2024 (v1), last revised 22 Mar 2024 (this version, v2))
Abstract: The fluid-fluid interface is a complex environment for a floating object where the statics and dynamics may be governed by capillarity, gravity, inertia, and other external body forces. Yet, the alignment of these forces in intricate ways might result in beautiful pattern formation and self-assembly of these objects, as in the case of bubble rafts or colloidal particles. While interfacial self-assembly has been explored widely, controlled manipulation of floating objects, e.g. drops, at the fluid-fluid interface still remains a challenge largely unexplored. In this work, we reveal the self-assembly and manipulation of water drops floating at an oil-air interface. We show that the assembly occurs due to electrostatic interactions between the drops and their environment. We highlight the role of the boundary surrounding the system by showing that even drops with a net zero electric charge can self-assemble under certain conditions. Using experiments and theory, we show that the depth of the oil bath plays an important role in setting the distance between the self-assembled drops. Furthermore, we demonstrate ways to manipulate the drops actively and passively at the interface.
Submission history
From: Paul Kaneelil [view email][v1] Thu, 21 Mar 2024 00:45:38 GMT (3164kb,D)
[v2] Fri, 22 Mar 2024 11:55:12 GMT (3033kb,D)
Link back to: arXiv, form interface, contact.