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1993
The surface self-diffusion of tungsten was studied mainly by field ion microscopy (FIM). The atomic displacements observed have been evaluated in terms of diffusion coefficients. With more than one adatom on a plane at a time, interactions between adatoms occur, and binding energies may be deduced.
Gerhard Czack +3 more
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The surface self-diffusion of tungsten was studied mainly by field ion microscopy (FIM). The atomic displacements observed have been evaluated in terms of diffusion coefficients. With more than one adatom on a plane at a time, interactions between adatoms occur, and binding energies may be deduced.
Gerhard Czack +3 more
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Resonant diffusion on modulated surfaces
Advances in Colloid and Interface Science, 2005Some theoretical methods for description of the diffusion on modulated surfaces are reviewed. A general formula for calculation of the diffusion coefficient of a particle moving in the field of a periodic potential is developed, which takes into account both the potential barrier effect and the dependence of the friction coefficient on the potential ...
Tsekov, R., Evstatieva, E.
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Long jumps in surface diffusion
Journal of Colloid and Interface Science, 2004Diffusion on metal surfaces is often viewed as the movement of atoms jumping between nearest-neighbor sites. However, statistical predictions suggest that at elevated temperatures longer jumps should become important. Now, with instruments such as the field ion microscope and the scanning tunneling microscope, which reveal individual adsorbed atoms, it
Grazyna, Antczak, Gert, Ehrlich
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Surface diffusion and island density
Physical Review Letters, 1992A Comment on the Letter by Mo, Kleiner, Webb, and Lagally, Phys. Rev. Lett. 66, 998 (1991).
Pimpinelli, Alberto +2 more
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Surface Diffusion and Island Growth
Defect and Diffusion Forum, 2007Grazing-Incidence Small Angle X-ray Scattering (GISAXS) and X-Ray Photon Correlation Spectroscopy (XPCS) studies of island growth in two different systems are presented: 5 ML of iron on MgO(001) and 10 ML of iron on Au(001). Due to a missing conducting surface Fe/MgO thinner than approximately 20 ML could not be studied previously by common methods ...
Reitinger, Rüdiger +8 more
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Surface Science, 1975
Abstract A commentary is presented on current progress towards understanding diffusion on surfaces. Recent work by field ion microscopy shows that interactions between diffusing adatoms lead to correlated motions and add unexpected complexity to the elementary diffusion mechanisms.
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Abstract A commentary is presented on current progress towards understanding diffusion on surfaces. Recent work by field ion microscopy shows that interactions between diffusing adatoms lead to correlated motions and add unexpected complexity to the elementary diffusion mechanisms.
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Anomalous Diffusion at Liquid Surfaces
Physical Review Letters, 1995We study the role of bulk-surface exchange in the diffusion of adsorbed molecules at liquid-solid and liquid-fluid interfaces. For ``strong adsorbers'' (readsorption time much less than desorption time) we find anomalous surface diffusion on time scales less than the surface retention time: Displacement moments grow as $〈{r}^{q}〉\ensuremath{\sim}{t ...
, Bychuk, , O'Shaughnessy
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Diffuse LEED and Surface Crystallography
Physical Review Letters, 1985Diffuse low-energy-electron diffraction measurements at 46 eV for a disordered O/W(100) surface at 120 K have been interpreted by theory to give the local geometry of the oxygen atoms. This first application of the technique shows that phonon scattering does not prevent interpretation of data, and demonstrates sensitivity to surface geometry comparable
, Heinz, , Saldin, , Pendry
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Microscopic theory of surface diffusion
Physical Review B, 1990We develop a microscopic theory of surface diffusion of adatoms using the Mori continued-fraction formalism. Along the surface plane, the adatom motion is extended leading to diffusive behavior, while motion perpendicular to the plane is assumed bounded and oscillatory.
, Ala-Nissila, , Ying
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Surface diffusion in porous catalysts
Physical Chemistry Chemical Physics, 2010This paper presents the application of pulsed field gradient (PFG) nuclear magnetic resonance (NMR) to observe surface diffusion of 1-octene in porous 1 wt% Pd/theta-Al(2)O(3) catalyst trilobes. We demonstrate for the first time the ability to identify diffusion on the pore surfaces unambiguously at ambient conditions in saturated porous media; this ...
Daniel, Weber +4 more
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