title: Dependence of volatile droplet lifetime on the hydrophobicity of the substrate.
abstract: In this Article, we demonstrate the dependence of the lifetime of a volatile droplet on the hydrophobicity of the substrate. Ethanol droplets placed on the molecularly smooth surfaces of three polymers, applied to substrates by spin-coating, showed distinct types of behavior depending on the hydrophobicity of the latter. High contact angles, θ, lead to fairly regular recession of the triple line during liquid evaporation at essentially constant θ, whereas low contact angle caused pinning, θ decreasing with time. The latter case leads to shorter drop lifetimes.
authors: Université de Bordeaux, Institut de Mécanique et d'Ingénierie de Bordeaux (I2M), CNRS UMR 5295, Bât. A4, Cours de la Libération, 33405 TALENCE Cedex, France.
authors: M E R
authors: ME
authors: Shanahan
authors: K
authors: K
authors: Sefiane
authors: J R
authors: JR
authors: Moffat
mesh_terms: D000431:Ethanol / Q000737:chemistry; D006207:Half-Life; D057927:Hydrophobic and Hydrophilic Interactions; D011108:Polymers / Q000737:chemistry*; D013499:Surface Properties; D055549:Volatile Organic Compounds / Q000737:chemistry*
chemical_list: D011108:Polymers; D055549:Volatile Organic Compounds; D000431:Ethanol