1. What have the authors contributed in "Apparent contact angle and contact angle hysteresis on liquid infused surfaces" ?
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2. What future works have the authors mentioned in the paper "Apparent contact angle and contact angle hysteresis on liquid infused surfaces" ?
Another important direction for future work is to investigate the possible presence of thin oil film coating the surface corrugations and/or the water droplet [ 2 ], including the molecular mechanism that determines the film thickness and its influence to the shape of the water droplet when their length scales are comparable.. The authors will explore this case in more details in future works.. Instead, it should be replaced by a composite water-oil and oil water interfaces, γwg → γow + γog −∆ ( e ), where the binding potential ∆ ( e ) is a function of the oil film thickness, and its form depends on the intermolecular interactions of the fluids.
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3. What is the hysteresis of the oil-water contact lines?
8. Contact angle hysteresis on liquid infused surfaces arises due to the pinning of oil-water and oil-gas contact lines by the surface corrugations.
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4. What is the way to assume the pressure ensemble for the water phase?
For the oil phase, instead it is appropriate to assume the pressure ensemble due to the presence of a large amount of oil infused in between the surface corrugations, which to a good approximation can be considered as an infinite reservoir.
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![TABLE I. Theoretical prediction for the apparent contact angle θSapp for several LIS systems reported in the literature[2, 3, 30], as given by Eq. (15). For the Cassie-Baxter contact angles, we have assumed rough surfaces with projected solid area fraction f = 0.44. The surface tensions are expressed in the unit of mN/m, the line tension τ is in Newton (N), and the angles are in degrees (◦). Λ is the dimensionless parameter needed for computing the line tension as defined in Eq. (25). For the computation of the line tension in Eq. (27), we have assumed a typical Laplace pressure ∆Pog = 10 3 Pa for the oil–gas ridge, corresponding to a radius of curvature, rog ∼ 100µm.](/figures/table-i-theoretical-prediction-for-the-apparent-contact-ywt5se4m.webp)
