Wetting transition
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Contact angles: history of over 200 years of open questions Open
The contact angle is one of the most sensitive experimental values describing a junction between three phases, being influenced by the composition and properties of contacting media as well as the structure and composition of interfaces in…
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Statics and Dynamics of Soft Wetting Open
The laws of wetting are well known for drops on rigid surfaces but change dramatically when the substrate is soft and deformable. The combination of wetting and the intricacies of soft polymeric interfaces have provided many rich examples …
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Liquid Metal Phagocytosis: Intermetallic Wetting Induced Particle Internalization Open
A biomimetic cellular‐eating phenomenon in gallium‐based liquid metal to realize particle internalization in full‐pH‐range solutions is reported. The effect, which is called liquid metal phagocytosis, represents a wet‐processing strategy t…
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Switchable wetting of oxygen-evolving oxide catalysts Open
The surface wettability of catalysts is typically controlled via surface treatments that promote catalytic performance. Here we report on potential-regulated hydrophobicity/hydrophilicity at cobalt-based oxide interfaces with an alkaline s…
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Self-Cleaning of Hydrophobic Rough Surfaces by Coalescence-Induced Wetting Transition Open
The superhydrophobic leaves of a lotus plant and other natural surfaces with self-cleaning function have been studied intensively for the development of artificial biomimetic surfaces. The surface roughness generated by hierarchical struct…
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Apparent Contact Angles on Lubricant-Impregnated Surfaces/SLIPS: From Superhydrophobicity to Electrowetting Open
A fundamental limitation of liquids on many surfaces is their contact line pinning. This limitation can be overcome by infusing a nonvolatile and immiscible liquid or lubricant into the texture or roughness created in or applied onto the s…
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Interaction of Surface Energy Components between Solid and Liquid on Wettability, and Its Application to Textile Anti-Wetting Finish Open
With various options of anti-wetting finish methods, this study intends to provide basic information that can be applied in selecting a relevant anti-wetting chemical to grant protection from spreading of liquids with different surface ene…
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Role of the Dynamic Contact Angle on Splashing Open
In this Letter, we study the splashing behavior of droplets upon impact onto a variety of substrates with different wetting properties, ranging from hydrophilic to superhydrophobic surfaces. In particular, we study the effects of the dynam…
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New Insights Into Complex Interactions Between Heterogeneity and Wettability Influencing Two‐Phase Flow in Porous Media Open
Coupled effects of wettability and pore geometry on pore‐scale dynamics of immiscible two‐phase fluid displacement were investigated using a multiphase lattice Boltzmann model in homogeneous and heterogeneous porous media under a wide rang…
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Relationship between wetting and capillary pressure in a crude oil/brine/rock system: From nano-scale to core-scale Open
The results show a dependency between surface coverage by oil, which controls the wetting alteration, and the macroscopic wetting response. The surface-area coverage is dependent on the capillary pressure applied during primary drainage. C…
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The Grain Boundary Wetting Phenomena in the Ti-Containing High-Entropy Alloys: A Review Open
In this review, the phenomenon of grain boundary (GB) wetting by melt is analyzed for multicomponent alloys without principal components (also called high-entropy alloys or HEAs) containing titanium. GB wetting can be complete or partial. …
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A thermodynamic model of contact angle hysteresis Open
When a three-phase contact line moves along a solid surface, the contact angle no longer corresponds to the static equilibrium angle but is larger when the liquid is advancing and smaller when the liquid is receding. The difference between…
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Quasistatic fluid-fluid displacement in porous media: Invasion-percolation through a wetting transition Open
We study the influence of wettability on the morphology of fluid-fluid displacement through analog porous media in the limit of vanishing flow rates. We introduce an invasion-percolation model that considers cooperative pore filling and co…
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An immersed boundary based dynamic contact angle framework for handling complex surfaces of mixed wettabilities Open
We propose a comprehensive immersed boundary-based dynamic contact angle framework capable of handling arbitrary surfaces of mixed wettabilities in three dimensions. We study a number of dynamic contact angle models and implement them as a…
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Wetting Effect on Patterned Substrates Open
A droplet deposited on a solid substrate leads to the wetting phenomenon. A natural observation is the lotus effect, known for its superhydrophobicity. This special feature is engendered by the structured microstructure of the lotus leaf, …
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Forced Wetting Transition and Bubble Pinch-Off in a Capillary Tube Open
Immiscible fluid-fluid displacement in partial wetting continues to challenge our microscopic and macroscopic descriptions. Here, we study the displacement of a viscous fluid by a less viscous fluid in a circular capillary tube in the part…
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Contact angles from Young’s equation in molecular dynamics simulations Open
We propose a method to calculate the equilibrium contact angle of heterogeneous 3-phase solid/fluid/fluid systems using molecular dynamics simulations. The proposed method, which combines the phantom-wall method [F. Leroy and F. Müller-Pla…
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Molecular dynamics investigation of surface roughness scale effect on interfacial thermal conductance at solid-liquid interfaces Open
Non-equilibrium molecular dynamics simulations were conducted for solid-liquid-solid systems with nanometer scale grooved surfaces and an induced heat flux for a wide range of topology and solid-liquid interaction conditions to investigate…
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A unified description of hydrophilic and superhydrophobic surfaces in terms of the wetting and drying transitions of liquids Open
Significance Whether a drop of liquid such as water is repelled from a solid substrate yielding a large angle of intersection between the drop’s surface and the substrate or is strongly attracted, small , is key to the function of a host o…
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Probing Effective Wetting in Subsurface Systems Open
Wetting phenomena are of central importance for many natural and technological processes in subsurface geosciences. Surface roughness, chemical heterogeneity, and dynamic effects cause the microscopic contact angle to vary widely in subsur…
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Kinetic drop friction Open
Liquid drops sliding on tilted surfaces is an everyday phenomenon and is important for many industrial applications. Still, it is impossible to predict the drop’s sliding velocity. To make a step forward in quantitative understanding, we m…
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Molecular origin of contact line friction in dynamic wetting Open
A hydrophilic liquid, such as water, forms hydrogen bonds with a hydrophilic substrate. The strength and locality of the hydrogen bonding interactions prohibit slip of the liquid over the substrate. The question then arises how the contact…
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The Challenge of Superhydrophobicity: Environmentally Facilitated Cassie–Wenzel Transitions and Structural Design Open
Superhydrophobic materials can be used in various fields to optimize production and life due to their unique surface wetting properties. However, under certain pressure and perturbation conditions, the droplets deposited on superhydrophobi…
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Regulation of droplet impacting on superhydrophobic surfaces: Coupled effects of macrostructures, wettability patterns, and surface motion Open
Superhydrophobic surfaces have shown great application prospects due to their excellent water repellency in many applications involving fluid–surface interactions. As a ubiquitous fluid–surface interaction phenomenon, droplet impacting dyn…
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The Direct Cause of Amplified Wettability: Roughness or Surface Chemistry? Open
Higher contact angles or amplified wettability observed on surfaces of rough solid materials are typically expressed as a function of a physical dimension (roughness factor). Herein, we present a simple experimental approach that demonstra…
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Universal wetting transition of an evaporating water droplet on hydrophobic micro- and nano-structures Open
Water-repellent, rough surfaces have a remarkable and beneficial wetting property: when a water droplet comes in contact with a small fraction of the solid, both liquid-solid adhesion and hydrodynamic drag are reduced. As a prominent examp…
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Explaining Evaporation-Triggered Wetting Transition Using Local Force Balance Model and Contact Line-Fraction Open
Understanding wettability and mechanisms of wetting transition are important for design and engineering of superhydrophobic surfaces. There have been numerous studies on the design and fabrication of superhydrophobic and omniphobic surface…
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Dependency of Contact Angles on Three-Phase Contact Line: A Review Open
The wetted area of a sessile droplet on a practical substrate is limited by the three-phase contact line and characterized by contact angle, contact radius and drop height. Although, contact angles of droplets have been studied for more th…
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Superhydrophobic Surface Preparation and Wettability Transition of Titanium Alloy with Micro/Nano Hierarchical Texture Open
Microstructures are applied to various hydrophobic/hydrophilic surfaces due to the role of adjusting the surface wettability. In this paper, a 1064 nm pulsed picosecond laser was applied to prepare a micro/nano hierarchical structure on th…
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Thermodynamics of wetting, prewetting and surface phase transitions with surface binding Open
In living cells, protein-rich condensates can wet the cell membrane and surfaces of membrane-bound organelles. Interestingly, many phase-separating proteins also bind to membranes leading to a molecular layer of bound molecules. Here we in…