What Determines the Size of Liquid Capillary Condensates Below the

J. Phys. Chem. C 2007, 111, 2141-2148

2141

What Determines the Size of Liquid Capillary Condensates Below the Bulk Melting Point? P. Barber,† T. Asakawa,‡ and H. K. Christenson*,† School of Physics and Astronomy, UniVersity of Leeds, Leeds, LS2 9JT, U.K. and DiVision of Materials Sciences, Graduate School of Natural Science and Technology, Kanazawa UniVersity, Kanazawa 920-1192, Japan ReceiVed: October 5, 2006; In Final Form: NoVember 1, 2006

Capillary condensation from vapor has been studied at temperatures below the bulk melting point Tm of the condensing substance using a surface force apparatus. Both mica and mica modified by self-assembly of a fluorinated surfactant (perfluoro-1H,1H,2H,2H-decylpyridinium chloride) have been used as substrate surfaces. The condensing liquids, cyclooctane and menthol, nearly wet (contact angle