ZnO Nanosquids: Branching Nanowires from Nanotubes and Nanorods

Abstract

One-dimensional (1D) semiconductor nanostructures are promising building blocks for future nano-electronic and nanophotonic devices. ZnO has proven to be a multifunctional and multistructural nanomaterial with promising properties. Here we report the growth of ZnO nanosquids which can be directly grown on planar oxidized Si substrates without using catalysts and templates. The formation of these nanosquids can be explained by the theory of nucleation, and the vapor-solid crystal growth mechanism. The branching nanowires of these ZnO nanosquids could have potential application in multiplexing future nanoelectronic devices. The sharp band-edge emission at ∼380 nm indicates that these ZnO nanosquids are also applicable for interesting optoelectronic devices.