Year: 2026
Type: article
Abstract: We investigated the selective formation and growth of endotaxial CoSi 2 nanowires and nanodots on Si(001) through reactive deposition endotaxy using substrate temperature control. By studying the nucleation behaviour and change in number densities (N) of the nanostructures in the pre-coalescence regime using scanning tunnelling microscopy (STM), the probability of nucleating flat-type nanodots or ridge-type nanowires was found to exhibit an Arrhenius-like dependence with growth temperature. Considering the surface distribution of cobalt adatoms in the steady growth regime, ridge-type nanowires are found to have a lower energy barrier (E R ) compared to flat-type nanodots (E F ) by 0.51 ± 0.08 eV. In other words, it is endotaxially and kinetically more favourable to nucleate and grow ridge-type nanowires over flat-type nanodots at lower growth temperatures. As the temperature increases, the distribution between ridge-type and flat-type islands becomes more balanced, with a trend suggesting that flat-type islands become increasingly favourable for nucleation and growth at higher temperatures.
Source: Scientific Reports
Authors: Bin Leong Ong, Eng Soon Tok
Institution: National University of Singapore
Language: English
Subfield: Biomedical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $2,690
Award: G292293857
OpenAlex ID: W7166553359
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