Beilstein J. Nanotechnol.2023,14, 133–140, doi:10.3762/bjnano.14.14
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 SiOx branches. The SiO2decomposition is activated at 1050 °C in a reducing atmosphere, and
to the strong ability of Au to enhance SiO2decomposition, and nanoflowers with less difference in their branches can be observed across the whole sample.
Keywords: Au/Ni bilayers; dewetting; vapor–liquid–solid; SiO2decomposition; SiOx nanowires; Introduction
Substantial efforts have been devoted
three Au/Ni layer thickness ratios (15 nm/5 nm, 10 nm/10 nm, and 5 nm/15 nm, denoted 15Au5Ni, 10Au10Ni, and 5Au15Ni, respectively) deposited onto SiO2 (300 nm)/Si substrates. Au enhances the SiO2decomposition rate stronger than Ni, leading to denser decomposition cavities observed in samples with
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Figure 1:
Morphology around decomposed areas (a–c). Distribution and composition of nanoflowers and particles...