Raman studies of Ti1-xFexO2 nano-particles

Nguyen Van Minh, Dao Hai Long, Nguyen The Khoi, Sung Jin Kim, In Sang Yang

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


Ti1-xFexO2 (x=0.00-0.13) nano-particles were prepared by hydrolysis method and characterized by SEM, TEM, XRD, and magnetization measurements (VSM). We investigated the effects of Fe doping on the structure of the Ti1-xFexO2 system by Raman scattering studies. SEM, TEM and XRD measurements show that the particle size of the powder is in nano-scale, and that the magnetic Fe impurities substitute for the Ti sites in the anatase TiO2 phase. All the samples with x>0 were found to be superparamagnetic at room temperature. Raman spectra show no iron-oxide peak at around 610 cm-1, strongly supporting that the Fe atoms go into the Ti-site in TiO2 of nano-particles. However, for the ceramic samples, one additional Raman peaks at around 610 cm -1 are observed. This may be related to the clusters or disorders created by mixture of various valence state of Fe ions. This may explain the existence if ferromagnetism in the ceramic Ti1-xFexO 2 system, but none in the Ti1-xFexO2 nano-particles.

Original languageEnglish
Title of host publication2006 IEEE Nanotechnology Materials and Devices Conference, NMDC
Number of pages2
StatePublished - 2006
Event2006 IEEE Nanotechnology Materials and Devices Conference, NMDC - Gyeongju, Korea, Republic of
Duration: 22 Oct 200625 Oct 2006

Publication series

Name2006 IEEE Nanotechnology Materials and Devices Conference, NMDC


Conference2006 IEEE Nanotechnology Materials and Devices Conference, NMDC
Country/TerritoryKorea, Republic of


  • Anatase
  • Diluted magnetic semiconductors
  • Nano-particle
  • Raman spectroscopy


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