High Transient Mobility of Chlorine onTiO2(110): Evidence for 'Cannon-Ball' Trajectories of Hot Adsorbates

Autor: Wilhelm Hebenstreit, G. Leonardelli, Michael Schmid, Peter Varga, Ulrike Diebold
Rok vydání: 1998
Předmět:
Zdroj: Physical Review Letters. 81:405-408
ISSN: 1079-7114
0031-9007
DOI: 10.1103/physrevlett.81.405
Popis: 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]
Databáze: OpenAIRE