We probed the anatase (101) surface irradiated by near-infrared and infrared photons in different ambient gases by monitoring the surface lattice phonon mode using sum-frequency spectroscopy. We found that even under the irradiation of such low energy photons, the stability of surface oxygen vacancies, in comparison to sub-surface oxygen vacancies, can increase sensibly. The variation of this surface phonon mode is also in accordance with the photo-induced hydrophilicity of titanium oxide surfaces, which may provide the microscopic insight into this phenomenon.
Structural variation of anatase (101) under near infrared irradiations monitored by sum-frequency surface phonon spectroscopy
Note: This article is part of the Special Topic “Nonlinear Spectroscopy and Interfacial Structure and Dynamics” in J. Chem. Phys.
Xinyi Liu, Tao Zhou, Wei-Tao Liu; Structural variation of anatase (101) under near infrared irradiations monitored by sum-frequency surface phonon spectroscopy. J. Chem. Phys. 28 February 2019; 150 (8): 084701. https://doi.org/10.1063/1.5066573
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