Abstract
Fabrication of GaAs/AlGaAs nano-ring structures by the droplet epitaxy technique is presented. Various double-ring shaped nanostructures are obtained by the crystallization of Ga droplets with a varying As supply and are characterized by the Atomic Force Microscopy. The formation mechanism of the nano-rings under the influence of the As flux has been deduced from the nano-ring morphology, revealing that the evolution of double nano-rings is caused by a combination of Ga migration and a nanodrilling effect.
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