Molecular Species on Nanoparticulate Anatase TiO2 Film Detected by Sum Frequency Generation: Trace Hydrocarbons and Hydroxyl Groups
Langmuir2003Vol. 19(18), pp. 7330–7334
Citations Over TimeTop 10% of 2003 papers
Abstract
Visible-infrared sum frequency generation (SFG) has been applied to probe molecular species on the surface of nanoparticulate anatase TiO2 films. A trace hydrocarbon film on the surface, not detected by Fourier transform infrared spectroscopy (FTIR), is easily sensed with SFG. The first direct observation of hydroxyl groups (-OH) on the TiO2 film surface by SFG is reported. A broad vibrational band with multiple peaks in the region of 3500−3800 cm-1 ascribed to OH groups reflects the surface heterogeneity of the material.
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