Structure and mechanism of alkali-metal-induced reconstruction of fcc (110) surfaces

Rj, Behm; Dk, Flynn; Kd, Jamison; Ertl, G.; Thiel, Patricia A.

doi:10.1103/physrevb.36.9267

Cited by 83 publications

(22 citation statements)

References 19 publications

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“…Such steps mainly descent via (111) rather than (331) facets in agreement with theoretical predictions by Roelofs et al [22]. Depending Alkali-metal adsorption (Na, K, Cs) on the otherwise stable (110) surfaces of Ni [29][30][31], Cu [32][33][34][35][36][37], Pd [38,39], and Ag [40--44,31] is known to induce (1 × 2) reconstruction of the MR-type. The alkali-atoms sit in the MR-channels (Fig.…”

Section: Au(110) and Pt(ll0)supporting

confidence: 67%

Reconstruction behaviour of fcc(110) transition metal surfaces and their vicinals

et al. 1992

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Abstract. The fcc(ll0) surfaces are well known for their strong tendency to missing-row (MR) type reconstructions either in the clean state (Au, Pt) or driven by adsorbates (Ni, Cu, Pd, Ag). The present knowledge on the different reconstruction behaviour of flat (110) surfaces is reviewed. The survey focuses on recent scanning tunneling microscopy (STM) studies, which for the first time also elucidate the dynamics of the reconstruction process for the various systems. An overview of our recent STM and low energy electron diffraction studies on vicinal Au(ll0) and Ni(110) surfaces is given, aiming for a deeper understanding of the influence of steps on reconstruction behaviour of fcc(110) surfaces on the one hand, and on the stability of reconstructing vicinal surfaces on the other. Finally, we report on the reconstruction behaviour of Ir(110), which stabilizes in the clean state by formation of mesoscopic (331) facets and dereconstructs to the (1 x 1) phase upon oxygen adsorption at 700-900 K.

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Section: Au(110) and Pt(ll0)supporting

confidence: 67%

Reconstruction behaviour of fcc(110) transition metal surfaces and their vicinals

et al. 1992

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“…missing-row reconstruction of Au(110) by less than 0.1 monolayer of K [31], and in stabilizing the (5 x 20) reconstruction of Pt(lOO) even in the presence of molecular adsorbates that lift the reconstruction [32]. The effects of alkali metals in these phenomena cannot be explained by the simple chemisorption model, such as that of Tomanek and Bennemann [25].…”

Section: Discussionmentioning

confidence: 99%

The effect of surface reconstruction on the capacitance of Au(100) surfaces

Ross

D’Agostino

1992

Electrochimica Acta

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“…Ordered alkali structures have been identified on the unreconstructed Ag, Cu, and Ni substrates at very low temperature. 10 Qualitatively, c(nϫ2) patterns exist above a critical coverage, found to be 0.28 ML for K/Ni͕110͖ at 90 K. 19 It is thought that with increasing coverage, continuous uniaxial compression in the ͗11 0͘ direction occurs, since the smoothest potential runs parallel to the close packed rows. Quasihexagonal structures result and at saturation the separation of nearest-neighbor adatoms is typically just less than that in the bulk bcc alkali metal lattice.…”

Section: A Leedmentioning

confidence: 99%

Coverage and temperature-dependent behavior of potassium on Pd{110}

2003

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The adsorption of potassium on Pd͕110͖ has been examined via correlated Auger electron spectroscopy, temperature programmed desorption, low-energy electron diffraction, and secondary electron emission crystal current measurements. Potassium overlayers are disordered at all coverages above 115 K. The uptake of K is readily monitored and the coverage calibrated by measuring the crystal current on adsorption below 200 K. The desorption of multilayer K is found to overlap the low-temperature first layer desorption feature and thus it is not appropriate to assume that the heat of adsorption for first layer K is considerably higher than for multilayer K in this case. Crystal current measurements at higher temperature indicate that some multilayer adsorption sites are populated before the first K layer is saturated. These results reflect the equilibrium distribution of adsorbates over the available sites, which is largely governed by the coverage-dependent differential heats of adsorption for first and second layers.

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Structure and mechanism of alkali-metal-induced reconstruction of fcc (110) surfaces

Cited by 83 publications

References 19 publications

Reconstruction behaviour of fcc(110) transition metal surfaces and their vicinals

Reconstruction behaviour of fcc(110) transition metal surfaces and their vicinals

The effect of surface reconstruction on the capacitance of Au(100) surfaces

Coverage and temperature-dependent behavior of potassium on Pd{110}

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