Dissociative adsorption of NO on TiO2(110) argon ion bombarded surfaces

Characterization of thin silicon overlayers on rutileTiO2(110)−(1×1)

“…This difference might be related to the ordered surface defects found in the (1x2) reconstruction, but not in the stoichiometric (1x1) surface. 18,45 These observations are confirmed by our DFT calculations. In Fig.…”

“…18 The ultimate pressure was 2 × 10 −10 mbar. The TiO 2 (110) rutile single crystals (10 × 10 × 1 mm 3 with both sides polished) used in this study were provided by PI-KEM Ltd. UK.…”

Ultra-thin Si overlayers on the TiO2 (110)-(1×2) surface: Growth mode and electronic properties

“…The presence of Ti-O-Si bonds has been reported in TiO 2 -SiO 2 oxide systems [35][36][37], and in TiO 2 films deposited on to SiO 2 [5][6][7]. The Ti 2p 3/2 core level spectrum for the clean (1 · 2) surface reconstruction is characterized by the presence of two components (see Table 2), the main one located at 458.5 eV corresponds to Ti 4+ species [23,34,38]. The second one centered at 456.8 eV (DE = 1.7 eV) matches with Ti 3+ species [18,23,24,39,40], and it is related to its presence in the (1 · 2) surface reconstruction.…”

“…Narrow-scan spectra were taken at analyzer pass energy of 50 eV, providing a resolution of about 1 eV. Before the XPS data were analyzed, the contribution of the Mg K a satellite lines were subtracted, a Shirley type background was used and the peaks were fitted according to standard methods [23,24]. The fitting of the Ti 2p peaks was performed using Gaussian doublets with a spin-orbit splitting of 5.7 eV and an intensity ratio of approximately 0.5, in agreement with the literature [24][25][26].…”

“…The spectra have been fitted with Gaussian curves (not shown, see Tables 1 and 2). More details about the fitting procedures are given in reference [23]. The core level O 1s spectrum at 529.9 eV for the clean (1 · 2) surface reconstruction can be fitted with a single Gaussian peak, corresponding to O species in Ti-O-Ti bonds [34].…”