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In this paper we have grown catalyst-free In(Ga)N nanowires and dot-in-nanowire heterostructures on (001) and (111) silicon substrates by plasma-assisted MBE. The nanowires grow in the wurtzite structure with c-axis in the direction of growth. HRTEM data indicate that the nanowires and dot-in-nanowires are defect free. The diameter of the nanowires can be varied from 50-100nm by varying the growth...
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