Equilibration dynamics of wetting layers
نویسندگان
چکیده
A direct and quantitative investigation of the transport kinetics of wetting layers is presented. The temporal decay of pulsed laser induced spatial thickness modulations in liquid ethanol f~ lms on a silver surface is monitored by means of optically excited surface plarrnons. Our method allows zn distinguish between different equilibration mechanisms. Under the condit~ons In our experiments. the dominant transport process is drect exchange of molecules with the saturated vapor. Contr~butions from lateral diffus~on were found to be less than lo' crn2/s.
منابع مشابه
Wetting and drying of a rigid substrate under variation of the microscopic details
Wetting and drying of a rigid substrate by a Lennard-Jones fluid in molecular dynamics simulations is reported. The size of the substrate particles, being smaller than the fluid particles in former simulations, is now taken to be equal to, respectively larger than, that of the fluid particles. Recently, for the latter type of system a first order drying transition has been reported. Like before...
متن کاملWetting transparency of graphene.
We report that graphene coatings do not significantly disrupt the intrinsic wetting behaviour of surfaces for which surface-water interactions are dominated by van der Waals forces. Our contact angle measurements indicate that a graphene monolayer is wetting-transparent to copper, gold or silicon, but not glass, for which the wettability is dominated by short-range chemical bonding. With increa...
متن کاملJovian Dynamics. Part II: The Genesis and Equilibration of Vortex Sets
To extend studies of the dynamics of thin atmospheric layers, the generation and equilibration of multiple anticyclonic vortex sets associated with long solitary baroclinic Rossby waves are examined numerically using a primitive equation model with Jovian parameters subject to a simple heating function. We seek primarily to model the three main groups of anticyclones seen on Jupiter, namely, th...
متن کاملIn situ Determination of Surface Tension-to-Shear Viscosity Ratio for Quasiliquid Layers on Ice Crystal Surfaces.
We have experimentally determined the surface tension-to-shear viscosity ratio (the so-called characteristic velocity) of quasiliquid layers (QLLs) on ice crystal surfaces from their wetting dynamics. Using an advanced optical microscope, whose resolution reaches the molecular level in the height direction, we directly observed the coalescent process of QLLs and followed the relaxation modes of...
متن کاملSuperdiffusive motion of the Pb wetting layer on the Si(111) surface.
Mass transport in the Pb wetting layer on the Si(111) surface is investigated by observing nonequilibrium coverage profile evolution with low energy electron microscopy and microlow energy electron diffraction. Equilibration of an initial coverage step profile occurs by the exchange of mass between oppositely directed steep coverage gradients that each move with unperturbed shape. The bifurcati...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2005