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

doi:10.1021/jp802943z

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

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

48 Citations (Scopus)

Abstract

Vertically aligned Mn (10%)-doped Fe₃O₄ (Fe _2.7Mn_0.3O₄) 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 language	English
Pages (from-to)	13911-13916
Number of pages	6
Journal	Journal of Physical Chemistry C
Volume	112
Issue number	36
DOIs	https://doi.org/10.1021/jp802943z
Publication status	Published - 2008 Sept 11
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
General Energy
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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10.1021/jp802943z

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

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.",

author = "Hwang, \{Seon Oh\} and Kim, \{Chang Hyun\} and Yoon Myung and Park, \{Seong Hun\} and Jeunghee Park and Joondong Kim and Han, \{Chang Soo\} and Kim, \{Jae Young\}",

year = "2008",

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doi = "10.1021/jp802943z",

language = "English",

volume = "112",

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T1 - Synthesis of vertically aligned manganese-doped Fe3O4 nanowire arrays and their excellent room-temperature gas sensing ability

AU - Hwang, Seon Oh

AU - Kim, Chang Hyun

AU - Myung, Yoon

AU - Park, Seong Hun

AU - Park, Jeunghee

AU - Kim, Joondong

AU - Han, Chang Soo

AU - Kim, Jae Young

PY - 2008/9/11

Y1 - 2008/9/11

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/52649085323

U2 - 10.1021/jp802943z

DO - 10.1021/jp802943z

M3 - Article

AN - SCOPUS:52649085323

SN - 1932-7447

VL - 112

SP - 13911

EP - 13916

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

IS - 36

ER -

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

Abstract

ASJC Scopus subject areas

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