Split of droplets at the nanoscale using mixed-wettability surfaces: A molecular dynamics simulation

Oblique Impacts of Nanodroplets upon Surfaces

“…For analysis, the position and velocity of each particle are extracted every 1 ps. The codes in this work have been validated by previous works. ,,,− …”

“…The LJ potential is adopted to model the interactions between atoms of water-Pt and Pt-Pt, expressed as U LJ ( r ) = 4 ε [ ( σ r ) 12 − ( σ r ) 6 ] , r < r cut where σ is the zero-crossing distance, ε is the depth of the potential well, and r is the distance between two atoms. To reduce the computational cost, for each atom, the interaction is only calculated with other atoms in r cut , where r cut is the cut-off distance and set as 1 nm, which has been widely validated in MD simulations for droplet impact processes by previous works. ,,− The interaction parameters are set at the same values as the previous studies, i.e., ε Pt‑Pt = 0.694 eV, σ water‑Pt = 0.282 nm, and σ Pt‑Pt = 0.247 nm . Wang et al selected these LJ parameters for investigating the impact of droplets at the cross regime, and they clearly claimed that these parameters could accurately reproduce the impact dynamics described by the previous studies.…”

“…The applications have their favorable outcomes; for example, inkjet printing usually welcomes the deposition; the bouncing is required for anti-icing surface design. For understanding the underlying mechanism of outcomes and spreading, the impact process of a droplet impacting a surface has been investigated in detail via theories, ,− numerical simulations, and experiments. − …”

“…The applications have their favorable outcomes; for example, inkjet printing usually welcomes the deposition; the bouncing is required for anti-icing surface design. For understanding the underlying mechanism of outcomes and spreading, the impact process of a droplet impacting a surface has been investigated in detail via theories, 1,6−9 numerical simulations, 10 and experiments. 11−14 Rioboo et al 15 first systematically reported the outcome of impacting droplets on surfaces, including deposition, prompt splash, corona splash, receding break-up, partial rebound, and rebound.…”

Dynamical behaviors of nanodroplets impinging on solid surfaces in the presence of electric fields

“…11 Experiments show that droplets go through different stages when they come into contact solid surfaces: impact, spreading, pulling back, and bouncing or settling. [12][13][14] Liu et al, 15 experimentally studied the wetting behavior of droplets under a disc electric field and observed that the strength of the electric field affects the spreading behavior and wetting angle of the droplets. Shenderov et al, 16 experimentally studied the processes of transport, capture, coupling and separation of microdroplets at a voltage of 60 V. They discovered that the size and distance between the electrode plates had no effect on the dynamic behavior of droplets.…”