Infrared Absorption Study of a Dihydrogen Complex in Anatase TiO 2
physica status solidi (b)(2020)
摘要
An infrared absorption study of natural anatase TiO 2 is performed. A complex with absorption lines at 3355.9 and 3357.3 cm −1 is shown to consist of at least two equivalent hydrogen atoms, whereby these features are due to the stretch local vibrational modes of two OH bonds located in the basal plane of the anatase crystal, forming an angle of approximately 90°. The complex is shown to be electrically active with a level in the upper part of the bandgap. The microscopic model of the defect is discussed.
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