The Spreading of Layered Microdroplets

The dynamics of impacting water droplets on alkanethiol self-assembled monolayers with co-adsorbed CH3 and CO2H terminal groups

“…Therefore, the use of the equilibrium contact angle in Eq. (14) does not arise from the assumption that it is equivalent to the advancing contact angle, but rather from a direct substitution of the original Young's equation leading to the surface tensions of the solid-vapor and solid-liquid interfaces with quantities that are more easily measurable-γ lv and θ Y . Combining the equations for the different energy terms and using the viscous term of Pasandideh-Fard et al [13] results in a new expression for the maximum spreading ratio as…”

Spreading in narrow channels

“…Experimental studies have shown that in some cases such precursor films have molecular thickness [13,14,15,16,17,18,19,20]. The spreading of such monolayers has been studied using a two-dimensional lattice gas Ising model [10,21,22] in which a half-space is occupied by a particle reservoir.…”

The Molecular Spreading of Nonpolar Perfluoropolyether Films on Amorphous Carbon Surfaces

“…At the microscopic scale, forces originating from the disjoining pressure gradient describe the spreading (2). Heslot et al (6) have intensively studied the spreading of small drops of polydimethylsiloxane on silica. Although Monte Carlo simulations have been used to explain the microscopic spreading of perfluoropolyether (PFPE) films on carbon surfaces (7,8), we introduce an alternative, mesoscopic (film thickness of less than several monolayers) approach based on the disjoining pressure gradient in this paper.…”