Tin Oxide Nanowires Synthesized via Flat Flame Deposition: Structures and Formation Mechanism

Premixed atmospheric flat flame deposition is a large-scale composite fabrication method that combined the advantages of flame synthesis and thermal evaporation. The technology has been successfully developed to sythesize SnO 2 nanowires. The results showed that the as-prepared SnO 2 nanowires with special tips are uniform single crystals, growing along [001] direction. Meanwhile, the growth mechanism of the present novel structure, which is a combination of both a vapor-solid ( VS) growth mechanism and a particle formation mechanism in a flame without any catalyst, is also proposed, Furthermore, the optical property is investigated by photoluminescence (PL) spectroscopy, indicating that such SnO 2 nanowires exhibit a much stronger emission peak at 620 nm. More importantly, this approach also provides a new pathway for sequentially engineering one-dimensional nanomaterials.