Title: Contact Angle Hysteresis near a First-Order Wetting Transition
Abstract:We examine the contact angle hysteresis for n-octane droplets on a n-hexadecyltrichlorosilane-coated silicon wafer in the vicinity of a first-order wetting transition with wetting temperature Tw = 49....We examine the contact angle hysteresis for n-octane droplets on a n-hexadecyltrichlorosilane-coated silicon wafer in the vicinity of a first-order wetting transition with wetting temperature Tw = 49.5 °C. A pinning transition is observed at Tp = 46.8 °C for the receding contact angle. Above this temperature, the contact line for receding droplets is pinned; consequently, the receding contact angle θr = 0°. We use contact angle data to quantify the substrate surface energy difference, Δσ(T) = σsv(T) − σsl(T), and the relative surface heterogeneity, h0/σlv, as a function of temperature T where σij is the surface energy between phases i and j.Read More
Publication Year: 2001
Publication Date: 2001-04-19
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 5
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