STM and STS investigations of Ce-doped TiO_2 nanoparticles

• 出 处: Rare Metals
• 发表日期: 2006年04期
• 关键词: tunneling versus doping normalized cathodic photocatalytic anatase nanometer des

Ce-doped titanium oxide nanoparticles were investigated in the paper. The surface structures of undoped and Ce-doped TiO2 nanoparticles were observed by scanning tunneling microscopy (STM). The experimental results of scan-ning tunneling spectroscopy (STS) show that the surface electronic structures of TiO2 nanoparticles are modified by intro-ducing new electronic states in the surface band gap through cerium ion doping. The results are discussed in terms of the in-fluence of doping concentration on the surface band gap of TiO2.

Ce-doped titanium oxide nanoparticles were investigated in the paper. The surface structures of undoped and Ce-doped TiO2 nanoparticles were observed by scanning tunneling microscopy (STM). The experimental results of scan-ning tunneling spectroscopy (STS) show that the surface electronic structures of TiO2 nanoparticles are modified by intro-ducing new electronic states in the surface band gap through cerium ion doping. The results are discussed in terms of the in-fluence of doping concentration on the surface band gap of TiO2.