Growth and properties of self-assembled InP-nanoneedles on (0Â 0Â 1) InP by gas source MBE

Catalyst-free self-assembled InP nanoneedles are grown on (0 0 1) InP-substrates using gas-source molecular beam epitaxy. The nanoneedles are investigated using SEM and TEM imaging, as well as micro-Raman measurements. Two nanoneedle orientations were observed: vertical (0 0 1)-oriented with the zincblende crystal structure and tilted needles with mixed zincblende and wurtzite structure.