Flutelike porous hematite nanorods and branched nanostructures: synthesis, characterisation and application for gas-sensing.

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dc.contributor.author Gou, X
dc.contributor.author Wang, G
dc.contributor.author Kong, X
dc.contributor.author Wexler, D
dc.contributor.author Horvat, J
dc.contributor.author Yang, J
dc.contributor.author Park, J
dc.date.accessioned 2011-02-07T06:18:51Z
dc.date.issued 2008
dc.identifier.citation Chemistry (Weinheim an der Bergstrasse, Germany), 2008, 14 (19), pp. 5996 - 6002
dc.identifier.issn 0947-6539
dc.identifier.other C1UNSUBMIT en_US
dc.identifier.uri http://hdl.handle.net/10453/13107
dc.description.abstract Flute-like porous alpha-Fe2O3 nanorods and branched nanostructures such as pentapods and hexapods were prepared through dehydration and recrystallisation of hydrothermally synthesised beta-FeOOH precursor. Transmission electron microscopy (TEM), high-resolution TEM and selected area electron diffraction analyses reveal that the nanorods, which grow along the [110] direction, have nearly hollow cavities and porous walls with a pore size of 20-50 nm. The hexapods have six symmetric arms with a diameter of 60-80 nm and length of 400-900 nm. The growth direction of the arms in the hexapod-like nanostructure is also along the [110] direction, and there is a dihedral angle of 69.5 degrees between adjacent arms. These unique iron oxide nanostructures offer the first opportunity to investigate their magnetic and gas sensing properties. The nanostructures exhibited unusual magnetic behaviour, with two different Morin temperatures under field-cooled and zero-field-cooled conditions, owing to their shape anisotropy and magnetocrystalline anisotropy. Furthermore, the alpha-Fe2O3 nanostructures show much better sensing performance towards ethanol than that of the previously reported polycrystalline nanotubes. In addition, the alpha-Fe2O3 nanostructure based sensor can selectively detect formaldehyde and acetic acid among other toxic, corrosive and irritant vapours at a low working temperature with rapid response, high sensitivity and good stability.
dc.format Print
dc.language eng
dc.relation.isbasedon 10.1002/chem.200701705
dc.title Flutelike porous hematite nanorods and branched nanostructures: synthesis, characterisation and application for gas-sensing.
dc.type Journal Article
dc.parent Chemistry (Weinheim an der Bergstrasse, Germany)
dc.journal.volume 19
dc.journal.volume 14
dc.journal.number 19 en_US
dc.publocation Germany en_US
dc.identifier.startpage 5996 en_US
dc.identifier.endpage 6002 en_US
dc.cauo.name SCI.Faculty of Science en_US
dc.conference Verified OK en_US
dc.for 0306 Physical Chemistry (Incl. Structural)
dc.personcode 109499
dc.percentage 100 en_US
dc.classification.name Physical Chemistry (incl. Structural en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity en_US
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
pubs.organisational-group /University of Technology Sydney/Strength - Materials and Technology for Energy Efficiency
utslib.copyright.status Closed Access
utslib.copyright.date 2015-04-15 12:17:09.805752+10
pubs.consider-herdc false
utslib.collection.history Closed (ID: 3)
utslib.collection.history School of Chemistry and Forensic Science (ID: 339)


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