Fig. 2. (Color online) Schematic illustration of the formation process of Si-AlN core-shell. (a) Formation of Al-based nanostructure (nano absorber), (b) reaction of Al, Ga and Si. (c) AlN with wurtzite structure. (d) Formation of similarly spaced elliptical membranes, (e) formation of droplets, (f) growth of droplets, (g) clumping by GaCl3, (h) formation of Si core and AlN shell.
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