Improved Synthesis and Electrical Properties of Si-Doped α-Fe2O3 Nanowires

摘要: We report an improved method to synthesize α-Fe2O3 (hematite) nanowires (NWs) via thermal oxidation that significantly reduces reaction time while improving NW density and uniformity. Stress introduced by shot-peening the starting steel foils relief of such stress seem play important role in promoting uniform one-dimensional growth. Water vapor is also shown strongly influence both morphology grown nanostructures. Furthermore, although as-grown NWs exhibit high average resistivity (4 × 102 ± 4 Ω·m) associated with undoped hematite, chemical deposition silane coating these NWs, followed annealing step, produces silicon-doped a 10–3 6 Ω·m. High-resolution electron microscopy, elemental mapping EDS, further study their electrical properties attribute increased conductivity lattice doping. These doped hematite arrays are promising cand...