Self-organized nanostripe arrays on ZnO (10-10) surfaces formed during laser molecular-beam-epitaxy growth Available to Purchase

Nanostripe arrays with high density in the orders of $10−5cm−1$ were naturally formed on ZnO (10-10) surfaces during laser molecular-beam-epitaxy (laser-MBE) growth. The nanostripe arrays were elongated above $5μm$ with a few branches along the [0001] direction. Transmittance electron microscopy showed that the nanostripe arrays were triangular-shaped in the cross section and two side bonding facets were composed of high-index [(31-40) and (4-1-30)] planes. The growth origin of the nanostripe arrays was derived from a step-faceting mechanism and nonthermal equilibrium growth by laser-MBE. The step faceting could be controlled by various growth conditions relating to the surface diffusion length of the ablated active species. It was found that the highly anisotropic surfaces dramatically affected electron transport of the ZnO (10-10) layers with Hall mobility parallel to the nanostripe edges more than two orders of magnitude larger than that perpendicular to the edges.