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When two nanowires cross each other, they form a point contact. Point contact reaction between a nano metal wire and a nano Si wire has been studied by using ultra-high vacuum and high resolution transmission electron microscopy. Axel epitaxial growth of nano silicides of NiSi and CoSi2 in nanowires of Si has been observed. The nucleation stage and stepwise growth stage of the reactive epitaxial growth...
We have improved in-plane uniformity of crystal shape for InGaAs micro-discs using a multi-step growth in micro-channel selective-area metal-organic vapor phase epitaxy on Si(111) substrates. The multi-step growth employs a gas flow sequence in which the partial pressure of a Ga source is modulated to control the initial nucleation and the growth mode. At the initial stage of growth, we grew InAs...
Epitaxial growth of silicon on heavily boron-doped Si(111) surface was investigated. In our experiments, we found a new growth mode in the very initial stage for boron-coverage below 0.5 monolayer (ML) likely associated with defect-induced nucleation of Si islands. The initially stage of growth on boron-covered Si(111) could be interpreted by a quasi van der Waals like epitaxy, where Si adatoms catch...
Improvements have been made in polycrystalline silicon films grown by the atmospheric pressure iodine vapor transport (APIVT) process. With optimized growth conditions, gas-phase nucleation that leads to spurious growth in the bulk and on the film surface can be eliminated. A smoother surface and nearly isotropic growth characteristics are also obtained, compared to films grown earlier. Hot-wire chemical...
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