An Experimental Study of Interfacial Dynamics Control Using Temperature-Sensitive Surfactants

) strongly dependent on surfactant composition and concentration. A unique thermal hysteresis in contact angle is observed and is attributed to the asymmetric adsorption/desorption kinetics and interfacial freezing, which is amplified in wider capillaries. However, temporal temperature gradients within the tested range have minimal influence on curvature switching, indicating quasi-static interfacial equilibration at supra-CMC concentrations. These findings establish a framework for actively manipulating interfacial geometry, providing design principles for programmable and reversible wettability control in interfacial systems.