[14p-D519-1~9] 6.5 Surface Physics, Vacuum

[14p-D519-7] Electronic state analysis of Cu nanoparticles on rutile TiO₂(110)

〇Kei Mitsuhara¹, Kazuma Ide¹, Takeru Yagi¹, Masaru Takizawa¹ (1.Ritsumeikan Univ.)

Keywords:Cu nanoparticles, rutile TiO2, photoelectron spectroscopy

The electronic properties of Cu nanoparticles grown on R- and O-TiO₂(110) substrates were analyzed by photoelectron and secondary electrons spectroscopy using SR light. As a result, the all O 2s and Ti 3p lines for R-TiO₂ and O-TiO₂ show higher EB shifts up to Cu coverage of 0.5 ML and then decrease almost linearly with increase Cu coverage. The work functions for both surfaces decrease abruptly by a small amount of Cu deposition. The Ti 3d defect state intensity increases after Cu deposition. These results suggest that Cu nanoparticles react with oxygen of the TiO₂(110) surface and then Cu nanoparticles is oxidized.