The surface science of titanium dioxide

TiO2 photocatalysis and related surface phenomena

The Interaction of Water with Solid Surfaces: Fundamental Aspects Revisited

Surface Science Studies of the Photoactivation of TiO2New Photochemical Processes

A surface science perspective on TiO2 photocatalysis

Intrinsic defects on a TiO2(110)(1×1) surface and their reaction with oxygen: a scanning tunneling microscopy study

Oxygen adsorption on Al(111): low transient mobility

Scanning tunneling microscopy was used to study the initial stages of Cl2 adsorption on TiO2s110d. Cl atoms adsorb on the rows of fivefold coordinated surface Ti atoms, and mostly form well separated pairs (average distance 26 A, atoms can be two or three rows apart). Abstractive adsorption results in 10% single Cl adatoms. We propose that Cl2 dissociates in an approximately upright position. The outer Cl atom is emitted along the bond axis and can surmount the substrate bridging oxygen rows in a “cannon-ball”-like trajectory. Channeling along the Ti rows leads to large average Cl-Cl distances. [S0031-9007(98)06535-1]

High Transient Mobility of Chlorine on TiO 2 ( 110 ) : Evidence for ``Cannon-Ball'' Trajectories of Hot Adsorbates

Using scanning tunneling microscopy, low-energy ion scattering, and quantitative low-energy electron diffraction, we find about $17%$ metal vacancies on the oxygen-covered Cr(100) surface. The oxygen atoms occupy all the hollow sites of the first layer, including those neighboring a Cr vacancy. We argue that the vacancy formation is energetically favored and not caused by stress but by electronic effects.

Oxygen-Induced Vacancy Formation on a Metal Surface

Low coverages of Co are deposited at room temperature on a Pt(111) surface with vacancy is providing a high density of steps. Scanning-tunneling microscopy images with chemical contrast s that Co atoms do not descend Pt steps by diffusing over the step, but descend from the upper terr the lower by an exchange diffusion process with the Pt atoms at the step edge. The Co atoms de a Pt step edge by this process neither at straight A nor atB steps, but rather at the corners or kinks o the vacancy islands. [S0031-9007(99)09409-0]

G. Leonardelli

Papers

Intrinsic defects on a TiO2(110)(1×1) surface and their reaction with oxygen: a scanning tunneling microscopy study

Oxygen adsorption on Al(111): low transient mobility

High Transient Mobility of Chlorine on TiO 2 ( 110 ) : Evidence for ``Cannon-Ball'' Trajectories of Hot Adsorbates

Oxygen-Induced Vacancy Formation on a Metal Surface

Interlayer Diffusion of Adatoms: A Scanning-Tunneling Microscopy Study