Nano Express

Nanoscale Research Letters

, Volume 4, Issue 8, pp 809-813

Open Access This content is freely available online to anyone, anywhere at any time.

Enhanced Luminescence of Eu-Doped TiO2 Nanodots

  • Ming LuoAffiliated withDepartment of Material Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University
  • , Kui ChengAffiliated withDepartment of Material Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University
  • , Wenjian WengAffiliated withDepartment of Material Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University Email author 
  • , Chenlu SongAffiliated withDepartment of Material Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University
  • , Piyi DuAffiliated withDepartment of Material Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University
  • , Ge ShenAffiliated withDepartment of Material Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University
  • , Gang XuAffiliated withDepartment of Material Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University
  • , Gaorong HanAffiliated withDepartment of Material Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University

Abstract

Monodisperse and spherical Eu-doped TiO2 nanodots were prepared on substrate by phase-separation-induced self-assembly. The average diameters of the nanodots can be 50 and 70 nm by changing the preparation condition. The calcined nanodots consist of an amorphous TiO2 matrix with Eu3+ ions highly dispersed in it. The Eu-doped TiO2 nanodots exhibit intense luminescence due to effective energy transfer from amorphous TiO2 matrix to Eu3+ ions. The luminescence intensity is about 12.5 times of that of Eu-doped TiO2 film and the luminescence lifetime can be as long as 960 μs.

Keywords

TiO2 Eu3+ Nanodots Phase-separation-induced self-assembly Luminescence