Pt Ti alloy formation on the Pt 111/ surface

Titanium growth on the Pt 111.surface has been studied by scanning tunneling microscopy STM.and photoelectron spectroscopy. Ti grows in islands with a coverage-dependent morphology and dispersion over the Pt 111. surface. No ordered structures were found at room temperature RT.. The photoelectron spectroscopy reveals that an alloy is formed already at RT. This low temperature alloying is very surprising since Pt`Ti alloys are Engel–Brewer type systems characterised by a very high exothermic heat of formation. q2000 Elsevier Science B.V. All rights reserved