The application of surface second harmonic sensor to probe laser induced modification of titanium dioxide.
Al-Obaidi, Ala H. R.
Robertson, Peter K. J.
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The effects of high power pulsed laser light on a TiO2 photocatalyst have been investigated using a surface second harmonic generation (SSHG) sensor. When TiO2 is irradiated with a laser at 355mm a visible change in colour from white to dark blue crystals was observed. X-ray diffraction studies indicate that the crystal structure of the TiO2 developed a more rutile form following laser exposure.