NEXAFS and FTIR-ATR Investigation of the Static and Dynamic Superhydrophobicity of Functionalized Titanium Dioxide Nanoparticle Coatings

Unravelling uniaxial strain effects on electronic correlations, hybridization and bonding in transition metal oxides

“…The transitions of O1s electron to all four molecular orbitals of TiO2 are dipole allowed due to presence of p-character in these hybridized orbitals. Generally, the first four O K-edge features (526 -548 eV) can be assigned to the one electron transition from the O1s orbital to the 2t2g, 3eg, 3a1g and 4t1u orbitals of TiO2, respectively [12]. The changes of absorption spectra ∆μ(X), defined as μ(X) − μ(0%), are presented below the spectra in Fig.…”

Tuning the Band Gap in Titanium Dioxide Thin Films by Surfactant-Mediated Confinement and Patterning of Gold Nanoparticles

“…As shown in Figure c, O k-edge NEXAFS spectra of pristine TiO 2 comprise two main regimes, a pre-edge region with two peaks (labeled a and b) between 530 and 536 eV and a broader region consisting of four broader higher-energy peaks (labeled c, d′, d, and e) between 538 and 555 eV. − The first two peaks a and b, observed at 531.6 and 534.3 eV, respectively, for the TO-0 film, arise due to the oxygen 2p empty states hybridized with the Ti 3d band, with the former having π symmetry and the latter σ symmetry. − Peak c (539.6 eV) is attributed to oxygen 2p states, which are antibonding combinations of direct oxygen–oxygen interactions . Peaks d′ (542.3 eV) and d (545.7 eV) are attributed to oxygen 2p empty states hybridized with Ti 4s and 4p states, respectively. , Peaks a, b, c, d′, and d thus correspond to the transitions O 1s → π*­(O 2p + Ti 3d), O 1s → σ*­(O 2p + Ti 3d), O 1s → σ*­(O 2p), O 1s → σ*­(O 2p + Ti 4s), and O 1s → σ*­(O 2p + Ti 4p), respectively.…”