Oxygen vacancies （OVs） play a critical role in the physical properties and applications of titanium dioxide nanos- tructures, which are widely used in electrochemistry and photo catalysis nowadays. In this work, OVs...Oxygen vacancies （OVs） play a critical role in the physical properties and applications of titanium dioxide nanos- tructures, which are widely used in electrochemistry and photo catalysis nowadays. In this work, OVs were artificially introduced in the surface of a pure TiO2 single crystal by pulsed laser irradiation. Raman spectra showed that the intensity of Eg mode was enhanced. Theoretical calculations disclose that this was caused by the strong coupling effect between the phonon vibration and plasmon induced by the OVs-related surface deformation, and good agreement was achieved between the experiments and theory.展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.61574080,11404162,61505085,and 61264008)the Natural Science Foundation of Jiangsu Province,China(Grant No.BK20130549)
文摘Oxygen vacancies （OVs） play a critical role in the physical properties and applications of titanium dioxide nanos- tructures, which are widely used in electrochemistry and photo catalysis nowadays. In this work, OVs were artificially introduced in the surface of a pure TiO2 single crystal by pulsed laser irradiation. Raman spectra showed that the intensity of Eg mode was enhanced. Theoretical calculations disclose that this was caused by the strong coupling effect between the phonon vibration and plasmon induced by the OVs-related surface deformation, and good agreement was achieved between the experiments and theory.
