Flutelike Porous Hematite Nanorods and Branched Nanostructures: Synthesis, Characterisation and Application for Gas-Sensing

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dc.contributor.author Gou, Xinglong en_US
dc.contributor.author Wang, Guoxiu en_US
dc.contributor.author Kong, Xiangyang en_US
dc.contributor.author Wexler, David en_US
dc.contributor.author Horvat, Josip en_US
dc.contributor.author Yang, Juna en_US
dc.contributor.author Park, Jinsoo en_US
dc.contributor.editor en_US
dc.date.accessioned 2011-02-07T06:18:51Z
dc.date.available 2011-02-07T06:18:51Z
dc.date.issued 2008 en_US
dc.identifier 2009006841 en_US
dc.identifier.citation Gou Xinglong et al. 2008, 'Flutelike Porous Hematite Nanorods and Branched Nanostructures: Synthesis, Characterisation and Application for Gas-Sensing', Wiley - VCH Verlag GmbH & Co. KGaA, vol. 14, no. 19, pp. 5996-6002. en_US
dc.identifier.issn 0947-6539 en_US
dc.identifier.other C1UNSUBMIT en_US
dc.identifier.uri http://hdl.handle.net/10453/13107
dc.description.abstract Flute-like porous ?-Fe2O3 nanorods and branched nanostructures such as pentapods and hexapods were prepared through dehydration and recrystallisation of hydrothermally synthesised ?-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 69.5o 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 ?-Fe2O3 nanostructures show much better sensing performance towards ethanol than that of the previously reported polycrystalline nanotubes. In addition, the ?-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. en_US
dc.language en_US
dc.publisher Wiley - VCH Verlag GmbH & Co. KGaA en_US
dc.relation.isbasedon http://dx.doi.org/10.1002/chem.200701705 en_US
dc.title Flutelike Porous Hematite Nanorods and Branched Nanostructures: Synthesis, Characterisation and Application for Gas-Sensing en_US
dc.parent Chemistry: A European Journal en_US
dc.journal.volume 14 en_US
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 030600 en_US
dc.personcode 0000062974 en_US
dc.personcode 109499 en_US
dc.personcode 0000063377 en_US
dc.personcode 0000062987 en_US
dc.personcode 0000027091 en_US
dc.personcode 0000063379 en_US
dc.personcode 0000062778 en_US
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
dc.description.keywords * branched nanostructures; * hematite; * magnetic properties; * porous materials; * sensors en_US

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