Fabrication of Axial and Radial Heterostructures for Semiconductor Nanowires by Using Selective-Area Metal-Organic Vapor-Phase Epitaxy

Figure 2

Structures of nanowire samples and SEM images of grown nanowires. (a) Schematics of structures for samples I and II. The nanowire diameter is defined by 𝑑. (b) SEM image for sample I. The nanowire pitch is defined by 𝑎. (c) SEM image for sample II. (d) Dependence of heights of samples I and II on their diameters [28].