ZnO Nanowire Growth
Zinc Oxide (ZnO) is a direct band-gap (E.g.=3.37eV) semiconductor with a large excitation binding energy (60meV), exhibiting near UV emission, transparent conductivity and piezoelectricity. Moreover, ZnO is biocompatible and can be used for biomedical applications without coating.
SEM image shows vertically aligned ZnO nanorods on GaN-coated sapphire - average length of 400nm.
Structures catalysed by Au nanoparticles. Courtesy of University of Cambridge Department of Engineering