Formation mechanism and characteristics of Au-Sn-O and Sn-O nanocompounds with various band gaps through flame chemical vapor deposition process

After forming the double layer of SnO2 and Au, the compound of Sn and O with mul-tiple band gaps was formed in a short time period via flame chemical vapor deposition (FCVD). The Sn component of SnO2 has fluidity and is the only one moving to the discrete Au side and leav-ing O behind. The capillarity of Sn allows it to form a unique structure with Au-Sn-O nanoparticles and amorphous Sn-O nanotubes of multiple compositions in a single process. For verification, the gradual morphological, crystallographic, compositional, and optical changes in the material were sequentially presented as per the degree of FCVD.(c) 2023 THE AUTHORS. Published by Elsevier BV on behalf of Faculty of Engineering, Alexandria University. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/ licenses/by-nc-nd/4.0/).

Automated summary

SnO2 and Au were deposited using flame chemical vapor deposition (FCVD) to form a double layer. A compound of Sn and O with multiple band gaps was formed in a short time, with Sn moving to the Au side and leaving O behind. Sn's capillarity allowed it to form a unique structure with Au-Sn-O nanoparticles and amorphous Sn-O nanotubes.