Substrate effect on phonon confinement in TiO_2 nanoparticles for thermal sensing application

摘要

The great potential of anatase TiO_2 nanoparticles (NPs) for high temperature applications is limited by the agglomeration, grain growth, and phase transformation into rutile. In this regard, we have decorated TiO_2 NPs over the surface of Santa Barbara Amorphous-15 (SBA15) and studied the substrate effect on the thermal stability of anatase TiO_2 NPs in terms of the grain growth and the phase transformation. Here, we reported the ultrafast grain growth of anatase TiO_2 NPs in TiO2-SBA15 nanocomposite in response to short time thermal exposure and the resulting phonon confinement effect for high temperature thermal sensing application.