Fabrication of Multiple Concentric Nanoring Structures
2009; American Chemical Society; Volume: 9; Issue: 10 Linguagem: Inglês
10.1021/nl901493f
ISSN1530-6992
AutoresClaudio Somaschini, Sergio Bietti, Nobuyuki Koguchi, S. Sanguinetti,
Tópico(s)Quantum and electron transport phenomena
ResumoWe present the fabrication of GaAs/AlGaAs Multiple (from three to five) concentric nanoring structures by an innovative growth method based on droplet epitaxy and characterized by short time As supply to the Ga droplets at different substrate temperatures. The formation mechanism has been interpreted on the basis of a detailed ex situ and in situ characterization of nanostructure morphology and surface reconstruction. We introduce design criteria which will allow to obtain concentric quantum ring structures of the desired complexity.
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