p-type α-Fe2O3 nanowires and their n-type transition in a reductive ambient

Yu Chen Lee, Yu Lun Chueh, Chin Hua Hsieh, Mu Tung Chang, Li Jen Chou, Zhong Lin Wang, Yann Wen Lan, Chii Dong Chen, Hiroki Kurata, Seiji Isoda

Research output: Contribution to journalArticlepeer-review

102 Citations (Scopus)


The synthesis and electronic properties of p-type Α-Fe 2O3 nanowires and their n-type transition in a reductive ambient with ordered oxygen vacancies were analyzed. Α-Fe 2O3 was the most stable iron oxide compound material, widely used in photoelectrodes, gas sensing, catalysts, magnetic recording, and in medical fields. SEM and image of Α-Fe2O3 nanowires synthesized on an Fe64Ni36 substrate at 450°C for 10 hours in an Ar ambient of 100 seem was done. A typical TEM image of nanowire with diameter of 18nm was analyzed. The corresponding diffraction pattern confirms the phase of Α-Fe2O3 with a [001] zone axis. The results show that p-type nature of iron oxide nanowire were mainly caused by strong surface adsorption owing to the oxygen vacancies and the large surface to volume ratio.

Original languageEnglish
Pages (from-to)1356-1361
Number of pages6
Issue number8
Publication statusPublished - 2007 Aug


  • Conductivity
  • Iron
  • Nanowires
  • Oxides

ASJC Scopus subject areas

  • Biotechnology
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)


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