The fact that molecular aggregates fall in the size range of 1 100 nm makes it a good candidate for nanoarchitectures and fabrication of nanodevices. Based mainly on our own research work, nanoarchiectures with controllable compositions and structures can be obtained by using layer by layer assembly and interfacial assembly techniques. These nanoarchitectures are the basis for fabrication of nanodevices. It is anticipated that these supramolecular assembly techniques involved will provide a way which can lead from nanoarchitectures to functional assemblies.