Effect of pre-annealing temperature on the growth of aligned a -Fe2O3 nanowires via a two-step thermal oxidation

• Main Authors: Rashid, N. M., Kishi, N., Soga, T.
• Format: Article
• Published: World Scientific Publishing Co. Pte Ltd 2016
• Subjects: TP Chemical technology
• Online Access: http://eprints.utm.my/id/eprint/72241/; https://www.scopus.com/inward/record.uri?eid=2-s2.0-84978325973&doi=10.1142%2fS0218625X1650027X&partnerID=40&md5=9b76da1bebea17a129403dc5cdb04eb3
• Institution: Universiti Teknologi Malaysia

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.