Synthesis of vertically aligned manganese-doped Fe3O4 nanowire arrays and their excellent room-temperature gas sensing ability

Seon Oh Hwang, Chang Hyun Kim, Yoon Myung, Seong Hun Park, Jeunghee Park, Joondong Kim, Chang-Soo Han, Jae Young Kim

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

Vertically aligned Mn (10%)-doped Fe3O4 (Fe 2.7Mn0.3O4) nanowire arrays were produced by the reduction/substitution of pregrown Fe2O3 nanowires. These nanowires were ferromagnetic with a Verwey temperature of 129 K. X-ray magnetic circular dichroism measurements revealed that the Mn2+ ions preferentially occupy the tetrahedral sites, substituting for the Fe 3+ ions. We observed that the Mn substitution decreases the magnetization, but increases the electrical conductivity. We developed highly sensitive gas sensors using these nanowire arrays, operating at room temperature, whose sensitivity showed a correlation with their bond strength of diatomic/triatomic molecules.

Original languageEnglish
Pages (from-to)13911-13916
Number of pages6
JournalJournal of Physical Chemistry C
Volume112
Issue number36
DOIs
Publication statusPublished - 2008 Sep 11
Externally publishedYes

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Manganese
Nanowires
manganese
nanowires
Gases
room temperature
synthesis
gases
Substitution reactions
Ions
substitutes
triatomic molecules
Temperature
Dichroism
diatomic molecules
Chemical sensors
dichroism
Magnetization
ions
X rays

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Synthesis of vertically aligned manganese-doped Fe3O4 nanowire arrays and their excellent room-temperature gas sensing ability. / Hwang, Seon Oh; Kim, Chang Hyun; Myung, Yoon; Park, Seong Hun; Park, Jeunghee; Kim, Joondong; Han, Chang-Soo; Kim, Jae Young.

In: Journal of Physical Chemistry C, Vol. 112, No. 36, 11.09.2008, p. 13911-13916.

Research output: Contribution to journalArticle

Hwang, Seon Oh ; Kim, Chang Hyun ; Myung, Yoon ; Park, Seong Hun ; Park, Jeunghee ; Kim, Joondong ; Han, Chang-Soo ; Kim, Jae Young. / Synthesis of vertically aligned manganese-doped Fe3O4 nanowire arrays and their excellent room-temperature gas sensing ability. In: Journal of Physical Chemistry C. 2008 ; Vol. 112, No. 36. pp. 13911-13916.
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