Dynamics of an adsorbed patch and a model for spreading of films of ultralow thicknesses

Neogi, P.
November 1996
Journal of Chemical Physics;11/15/1996, Vol. 105 Issue 19, p8909
Academic Journal
The dynamics of ultrathin films of liquids with vanishing 3D volatility, on solid surfaces, has been modeled by assuming that the films can be taken to be adsorbed patches spreading under surface diffusion. When the phase behavior of the adsorbed films is taken into account, it is seen that a vapor patch will spread without limits and evolve into a Gaussian profile. For a liquid film which has low 2D volatility, a patch will appear to equilibrate and the surface ahead will remain dry. This is the ‘‘pancake,’’ a case where a wetting liquid stops spreading. The spreading kinetics is generally seen to be the usual square-root-of-time type, although exceptions are also seen. A simple case of non-Fickian diffusion has been included, but fails to give anticipated results at least in a simple model. © 1996 American Institute of Physics.


Related Articles

  • Evolution of structural and magnetic properties in Ta/Ni81Fe19 multilayer thin films. Hashim, I.; Atwater, H. A.; Kung, K. T. Y.; Valletta, R. M. // Journal of Applied Physics;7/1/1993, Vol. 74 Issue 1, p458 

    Examines the interdiffusion kinetics in Ta/Ni[sub81]Fe[19] polycrystalline multilayer films. Concurrent grain growth and grain-boundary diffusion; Evolution of soft magnetic preperties upon thermal annealing; Background on a kinetic analysis of interdiffusion.

  • Intrinsic compressive stress in polycrystalline films with negligible grain boundary diffusion. Sheldon, Brian W.; Ditkowski, Adi; Beresford, R.; Chason, Eric; Rankin, Janet // Journal of Applied Physics;7/15/2003, Vol. 94 Issue 2, p948 

    The model developed here describes compressive stress evolution during the growth of continuous, polycrystalline films (i.e., beyond the point where individual islands have coalesced into a continuous film). These stresses are attributed to the insertion of excess adatoms at grain boundaries....

  • Kinetics of diffusion growth of silicides in silicon–thin-metal-film systems. Barg, A. I.; Bokstein, B. S.; Klinger, L. M. // Journal of Applied Physics;8/15/1992, Vol. 72 Issue 4, p1356 

    Proposes a kinetic model for diffusional growth of silicides in thin-metal-silicon systems. Experimental results; Equations and solutions of diffusion growth model; Conclusions.

  • The dynamics and stability of thin liquid films during spin coating. I. Films with constant rates of evaporation or absorption. Reisfeld, B.; Bankoff, S. G.; Davis, S. H. // Journal of Applied Physics;11/15/1991, Vol. 70 Issue 10, p5258 

    Presents a study which investigated the dynamics and stability of thin liquid films during spin coating. Derivation of a nonlinear evolution equation which describe the shape of the film interface; Domains of stability exhibited by thin liquid films when an absorption is presents at the free...

  • Light-induced instabilities driven by competing helical patterns in long-pitch cholesterics. Brasselet, E.; Krimer, D.; Kramer, L. // European Physical Journal E -- Soft Matter;Aug2005, Vol. 17 Issue 4, p403 

    We study theoretically the dynamical reorientation phenomena when a long-pitch cholesteric liquid-crystal film with homeotropic alignment is illuminated by a circularly polarized lightwave. In the present case, the natural cholesteric pitch is of the order of (or larger than) the film thickness....

  • Generation of mirage effect by heated carbon nanotube thin film. Tong, L. H.; Lim, C. W.; Li, Y. C.; Chuanzeng Zhang; Tinh Quoc Bui // Journal of Applied Physics;2014, Vol. 115 Issue 24, p244905-1 

    Mirage effect, a common phenomenon in nature, is a naturally occurring optical phenomenon in which lights are bent due to the gradient variation of refraction in the temperature gradient medium. The theoretical analysis of mirage effect generated by heated carbon nanotube thin film is presented...

  • Dynamics of simple liquids at heterogeneous surfaces: Molecular-dynamics simulations and hydrodynamic description. Cottin-Bizonne, C.; Barentin, C.; Charlai, É; Bocquet, L.; Barrat, J.-L. // European Physical Journal E -- Soft Matter;Dec2004, Vol. 15 Issue 4, p427 

    In this paper we consider the effect of surface heterogeneity on the slippage of fluid, using two complementary approaches. First, MD simulations of a corrugated hydrophobic surface have been performed. A dewetting transition, leading to a super-hydrophobic state, is observed for pressure below...

  • Reactive Diffusion in Ni-Si Bulk Diffusion Couples. Oukassi, S.; Hodaj, F. // Journal of Phase Equilibria & Diffusion;Jun2009, Vol. 30 Issue 3, p230 

    Reactive diffusion in the Ni-Si system has been studied using bulk polycrystalline Ni/Si wafer diffusion couples in the temperature range from 450 to 700 °C and with annealing times of up to 32 h. For all diffusion couples, three phases were detected Ni2Si, Ni3Si2, and NiSi. The thickness e...

  • Diffusion and crystallization mechanisms of Ge/Au bilayer media for write-once optical disk. Wu, T. H.; Kuo, P. C.; Ou, S. L.; Chen, Jung-Po; Yen, Po-Fu; Jeng, Tzuan-Ren; Wu, Chih-Yuan; Huang, Der-Ray // Applied Physics Letters;1/7/2008, Vol. 92 Issue 1, p011126 

    Ge/Au bilayer thin films were fabricated by magnetron sputtering method, the temperature dependence of resistance from room temperature to 500 °C and concentration depth profiles are measured. From the temperature dependence of resistance measurement, we found two phase change phenomena which...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics