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EFFECT OF PRE-ANNEALING TEMPERATURE ON THE GROWTH OF ALIGNED α-Fe2O3 NANOWIRES VIA A TWO-STEP THERMAL OXIDATION

Norhana Mohamed Rashid, Naoki Kishi and Tetsuo Soga
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Norhana Mohamed Rashid: Department of Frontier Materials, Nagoya Institute of Technology, Nagoya 466-8555, Japan†Department of Renewable Energy Engineering, Universiti Teknologi Malaysia, Johor Bahru, Johor 81310, Malaysia
Naoki Kishi: Department of Frontier Materials, Nagoya Institute of Technology, Nagoya 466-8555, Japan
Tetsuo Soga: Department of Frontier Materials, Nagoya Institute of Technology, Nagoya 466-8555, Japan

Surface Review and Letters (SRL), 2016, vol. 23, issue 04, 1-6

Abstract: Pre-annealing as part of a two-step thermal oxidation process has a significant effect on the growth of hematite (α-Fe2O3) nanowires on Fe foil. High-density aligned nanowires were obtained on iron foils pre-annealed at 300∘C under a dry air flow for 30min. The X-ray diffraction (XRD) patterns indicate that the nanowires are transformed from the small α-Fe2O3 grains and uniquely grow in the (110) direction. The formation of a high-density of small grains by pre-annealing improved the alignment and density of the α-Fe2O3 nanowires.

Keywords: Iron oxide; nanowire; pre-annealing; oxidation (search for similar items in EconPapers)
Date: 2016
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DOI: 10.1142/S0218625X1650027X

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