Resonant photothermal laser processing of hybrid gold/titania nanoparticle films

- Photothermal processing of TiO2 and hybrid Au/TiO2 nanoparticles using continuous-wave lasers is demonstrated.
- Processing of TiO2 nanoparticles at 355 nm results in a transition from anatase to rutile.
- Decoration of TiO2 nanoparticles with Au nanoparticles results in an increased absorbance in the visible range.
- Hybrid Au/TiO2 nanoparticles can be processed at 355 nm and 532 nm in a large laser parameter window.
- Processing of hybrid Au/TiO2 nanoparticles at 532 nm can be carried out at low laser powers and short laser pulse lengths.