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In the growth of GaAsP nanowires on GaAs (001) substrates, it was found that the P concentrations in the nanowires and unintentional two-dimensional (2D) GaAsP layer are different. Possible explanations are given.
We review GaAs and InP nanowires and GaAs based nanowire heterostructures grown on (111)B substrates by metal organic chemical vapor deposition via vapor-liquid-solid (VLS) mechanism. Transmission electron microscopy, time-resolved photoluminescence and micro-Raman spectroscopy have been used to understand the crystal structure, carrier lifetime and strain effects on the bandgap energy.
In this paper, we demonstrate the key issues of axial nanowire heterostructures, such as, the fundamental criteria for formation and failure of axial nanowire heterostructures via vapor-liquid-solid mechanism and lateral misfit strain relaxation in these structures. We show the failure of axial nanowire heterostructures by growing InAs axially on GaAs nanowires, and the lateral misfit strain relaxation...
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