Abstract : This project is focused on developing the underlying science and technology required to enable the rational design and synthesis of functional nanoscale assemblies and the hierarchical assembly of these local functional structures into multifunctional systems. To achieve these objectives we are pursuing a highly interdisciplinary program that addresses in parallel the major scientific hurdles of the project, including development of electronically and optically well-defined nanoscale building blocks required to create novel functional nanostructures, and development of flexible and scalable methods for the assembly of these building blocks into novel functional nanostructures and nanostructured multifunctional systems. Significant progress has been made during the past fiscal year in several areas of the project. First, we have developed and demonstrated powerful methods for creating the first axial nanowire superlattice structures in which both composition and doping can be varied; Second, we have demonstrated that the nanowire possess novel photonic behavior and have configured optical bar codes and intrawire nanoscale light-emitting diodes. Third, we have demonstrated that doping modulation can be used to design and synthesize active nanoelectronic devices. These nanowire super lattice materials open up many new opportunities in nanoelectronics and nanophotonics.
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