Akademik Veri Yönetim Sistemi
Physics of Low-Dimensional Structures, cilt.1998, sa.3-4, ss.191-198, 1998 (Scopus)
Non-dissociative adsorption of ammonia on a Cu(110) surface leads to the formation of two distinct entities between 80 and 298K. A single XP N(1s) peak at 401 eV and the VEEL spectra characterize the a ammonia species which is primarily physically coordinated to surface sites via diverse types of hydrogen bonds. The β picture is clearly evident by the persistent Rxy mode at 410 cm-1. Direct interaction between the 'monolayer' and most of the 'overlayer' NH3 groups reduces the Bronsted acidity of surface copper atoms. No N-H bond rupture occurs prior to the transformation of the β pattern back into the form and an ammonia-free surface is regenerated eventually.