Syntheses and Characterizations of CuInZnSe Chalcopyrite Nanoparticles.

CuInZnSe powders with various atomic percentages (x = 0, 0.05, 0.11, 0.

Orientation-dependent chemistry and band-bending of Ti on polar ZnO surfaces.

Orientation-dependent reactivity and band-bending are evidenced upon Ti deposition (1-10 Å) on polar ZnO(0001)-Zn and ZnO(0001[combining macron])-O surfaces. At the onset of the Ti deposition, a downward band-bending was observed on ZnO(0001[combining macron])-O while no change occurred on ZnO(0001)-Zn. Combining this with the photoemission analysis of the Ti 2p core level and Zn L(L)MM Auger transition, it is established that the Ti/ZnO reaction is of the form Ti + 2ZnO → TiO + 2Zn on ZnO(0001)-Zn and Ti + yZnO → TiZnO + (y - x)Zn on ZnO(0001[combining macron])-O.