Nanomaterials and devices thereof offer many advantages over conventional coarse-grained counterparts. By varying nanocrystallite size and interfacial properties, it is possible to control magnetic, photonic, and mechanical properties and create functionally gradient thin films and composites. Single-domain nanomagnets offer many advantages over multi-domain coarse-grained counterparts. Similarly, superior electronic properties can be obtained by confining carriers within nanocrystallites where they do not see defects typically present in large-grained materials. However, these advantages can be realized only if processing challenges can be overcome to create suitable nanostructured materials. Processing of nanocrystalline materials into useful form often leads to creation of porosity "artifacts" and the presence of undesirable interface states. We have created novel nanostructured materials by our sequential and simultaneous self-assembly processing. Using controlled processing methods, we have created “artifact” free thin films and composites and realize "true" properties of nanocrystalline materials. This talk will focus on potential for manufacturing novel magnetic, electronic, photonic and super strong structural devices.