We have designed and synthesized functional molecules with structural features that favor assembly into aggregate nanostructures via combination of intermolecular interactions and self-assembly techniques.These large-areas ordered molecular aggregate nanostructures are based on a variety of molecular structures such as perylenes, anthracenes, porphyrins, polydiacetylenes, fullerenes and their derivatives.We have also developed new methods to construct these larger structures including organic vapor-solid phase reaction, natural growth, association via self-polymerization and self-organization, and a combination of self-assembly and electrochemical growth.These methods are both facile and reliable, allowing us to produce ordered and aligned aggregate nanostructures, such as large-area arrays of nanowires, nanorods, and nanotubes.Large-area ordered aggregate structures exhibit interesting electrical, optical, and optoelectronic properties for applications in next-generation electronic and optoelectronic devices.