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In this contribution we present our recently developed “reverse-reaction-growth” scheme in molecular beam epitaxy to fabricate 1D GaAs nanowires (NWs) with diameters down to 7 nm. We observe the presence of strong quantum confinement phenomena, opening the path towards a true 1D NW platform. The introduction of crystal defects in the NW effectively leads to bright and spectrally sharp crystal phase...
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