H. Bludau

The adsorption of atomic nitrogen on Ru(0001): geometry and energetics

Abstract The local adsoprtion geometries of the (2 × 2)-N and (✓3 × ✓3)R30°-N phases on the Ru(0001) surface are determined by analyzing low-energy electron diffraction intensity data. For both phases, nitrogen occupies the threefold hcp site. The nitrogen sinks deeply into the top Ru layer resulting in a N-Ru interlayer distance of 1.05 and 1.10 A in the (2 × 2) and the (✓3 × ✓3)R30° unit cell, respectively. This result is attributed to a strong N binding to the Ru surface (Ru-N bond length = 1.93 A ) in both phases as also evidenced by an initio calculations which revealed binding energies of 5.82 and 5.59 eV, respectively.

Oxygen adsorption on the Ru(1010) surface: Anomalous coverage dependence

Oxygen adsorption on to Ru(101\ifmmode\bar\else\textasciimacron\fi{}0) results in the formation of two ordered overlayers, i.e., a

Fingerprinting technique in low-energy electron diffraction

c(2\ifmmode\times\else\texttimes\fi{}4)\ensuremath{-}2\mathrm{O}

A low-energy electron diffraction analysis of the R30° structure of molecular nitrogen adsorbed on Ru(0001)

and a

The bending mode vibration of CO on Ru(0001) studied with low-energy electron-diffraction

(2\ifmmode\times\else\texttimes\fi{}1)p2mg\ensuremath{-}2\mathrm{O}

Structural aspects of cesium-oxygen phases on Ru(0001)

phase, which were analyzed by low-energy electron diffraction (LEED) and density functional theory (DFT) calculation. In addition, the vibrational properties of these overlayers were studied by high-resolution electron loss spectroscopy. In both phases, oxygen occupies the threefold coordinated hcp site along the densely packed rows on an otherwise unreconstructed surface. The O atoms are attached to two atoms in the first Ru layer Ru(1) and to one Ru atom in the second layer Ru(2), forming zigzag chains along the troughs. While in the low-coverage

Coverage-dependent adsorption sites in the K/Ru(0001) system: a low-energy electron-diffraction analysis

c(2\ifmmode\times\else\texttimes\fi{}4)\ensuremath{-}\mathrm{O}

Na adsorption on Ru(0001) : a low-energy electron-diffraction analysis of three ordered phases

phase, the bond lengths of O to Ru(1) and Ru(2) are 2.08 and 2.03 \AA{}, respectively, corresponding bond lengths in the high-coverage

Cs and CO coadsorbed on Ru(0001): low-energy electron diffraction analysis

(2\ifmmode\times\else\texttimes\fi{}1)\ensuremath{-}p2mg\ensuremath{-}2\mathrm{O}

STRUCTURAL PROPERTIES OF ALKALI-METAL ATOMS ADSORBED ON Ru(0001)

phase are 2.01 and 2.04 \AA{} (LEED). Although the adsorption energy decreases by 220 meV with O coverage (DFT calculations), we observe experimentally a shortening of the Ru(1)-O bond length with O coverage. The