Gas Phase Nanowire Integration Process PI : Heiko

We report on a gas phase process to synthesize and integrate seed particles and inorganic nanowires with control over location, diameter, length, and geometrical orientation. The process flow begins with the gas phase synthesis and size selection of nanoparticle seeds. The seed particles are deposited onto addressable locations on a substrate by Coulomb force and fringing field directed assembly. The seed particles are then subsequently grown into nanowires in a second reactor. Gold nanowires are grown in a focused deposition and annealing process. Silicon nanowires are grown via a vapor liquid solid process from gold nanoparticle catalysts. ZnO nanowires are grown by hydrothermal synthesis from oxidized zinc acetate seeds. These wires were further processed to form ZnO nanowire/p-GaN heterojunction light emitting diodes (LEDs) with vastly different electroluminescence spectra under forward and reverse bias.