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

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93 Citations (Scopus)

Abstract

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
JournalSmall
Volume3
Issue number8
DOIs
Publication statusPublished - 2007 Aug

Keywords

  • Conductivity
  • Iron
  • Nanowires
  • Oxides

ASJC Scopus subject areas

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

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    Lee, Y. C., Chueh, Y. L., Hsieh, C. H., Chang, M. T., Chou, L. J., Wang, Z. L., Lan, Y. W., Chen, C. D., Kurata, H., & Isoda, S. (2007). p-type α-Fe2O3 nanowires and their n-type transition in a reductive ambient. Small, 3(8), 1356-1361. https://doi.org/10.1002/smll.200700004