Fabrication of TiO2 Grating with Composites of Azobenzene Polymer and TiO2 Nanoparticles

摘要

We have used the formation of surface relief gratings (SRG) on azobenzene polymers to manipulate TiO2 nanoparticles and to fabricate TiO2 nanoparticle gratings. Suspensions of an azobenzene polymer (PDO3) and TiO2 were used to spin coat thin films on glass slide substrates. By interfering coherent light from an Argon laser on the surface of the PDO3-TiO2 composite films, SRGs were fabricated. Atomic force microscopic images of the SRGs show TiO2 nanoparticles dispersed throughout the sample, and in particular, at the peaks of the SRG after oxygen plasma treatment. The lateral forces acting on the azobenzene polymer during the SRG fabrication drag the TiO2 nanoparticles. These results indicated that it is feasible to create TiO2 nanoparticle gratings with the composites.