Formation of nanoflowers: Au and Ni silicide cores surrounded by SiO _x branches.

ABSTRACT: This work reports the formation of nanoflowers after annealing of Au/Ni bilayers deposited on SiO₂/Si substrates. The cores of the nanoflowers consist of segregated Ni silicide and Au parts and are surrounded by SiO _x branches. The SiO₂ decomposition is activated at 1050 °C in a reducing atmosphere, and it can be enhanced more by Au compared to Ni. SiO gas from the decomposition of SiO₂ and the active oxidation of Si is the source of Si for the growth of the SiO _x branches of the nanoflowers. The concentration of SiO gas around the decomposition cavities is inhomogeneously distributed. Closer to the cavity border, the concentration of the Si sources is higher, and SiO _x branches grow faster. Hence, nanof

SUBMITTER: Li F 

PROVIDER: S-EPMC9874233 | biostudies-literature | 2023

REPOSITORIES: biostudies-literature