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  • Title: Self-directed growth of AlGaAs core-shell nanowires for visible light applications.
    Author: Chen C, Shehata S, Fradin C, LaPierre R, Couteau C, Weihs G.
    Journal: Nano Lett; 2007 Sep; 7(9):2584-9. PubMed ID: 17696557.
    Abstract:
    Al0.37Ga0.63As nanowires (NWs) were grown in a molecular beam epitaxy system on GaAs(111)B substrates. Micro-photoluminescence measurements and energy dispersive X-ray spectroscopy indicated a core--shell structure and Al composition gradient along the NW axis, producing a potential minimum for carrier confinement. The core--shell structure formed during growth as a consequence of the different Al and Ga adatom diffusion lengths.
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