Site-Selective Excitation of Ti³⁺ Ions in Rutile TiO₂ via Anisotropic Intra-Atomic 3d → 3d Transition.

ABSTRACT: Site-selective excitation (SSE), which is usually realized by tuning the wavelength of absorbed light, is an ideal way to study bond-selective chemistry, analyze the crystal structure, investigate protein conformation, etc., eventually leading to active manipulation of desired processes. Herein, SSE has been explored in (110)-, (100)-, and (011)-faced rutile TiO₂, a prototypical material in both surface science and photocatalysis fields. Using ultraviolet photoelectron spectroscopy and photon energy-, substrate orientation-, and laser polarization-dependent two-photon photoemission spectroscopy (2PPE), intra-atomic 3d → 3d transition from the split Ti³⁺ 3d orbitals, i.e., band gap states and excited states at ∼1.00 eV below and ∼2.40 eV above the Fermi level, respecti

SUBMITTER: Li J 

PROVIDER: S-EPMC10900497 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature