Understanding the role of catalysts in the epitaxial growth of multinary III-V semiconductor nanowires and nanowire heterostructures. This project will address a bottle-neck problem in the nanowire community. The outcomes of this project will provide new knowledge in nanoscience and guidelines for the development of nanowire-based nanodevices and nanosystems. This is strategically important to place Australia at the forefront of developments on nanoscience and nanotechnology.