Bong Sup Shim1 Taesik Eom1 Milan Simek3 Mehmet Mutlu2

1, Inha University, Incheon, , Korea (the Republic of)
3, Institute of Plasma Physics, Prague, , Czechia
2, TOBB University of Economics and Technology, Ankara, , Turkey

Natural systems utilize multifunctional biocomposites by a bottom-up self-assembly of nanomaterials for creating multiscale, hierarchical, and multiphasic structures. While conventional man-made synthetic composites increase one functionality by sacrificing the others, the biocomposites often synchronistically maximize multi-funcitonality. Here, by molecularly organized layer-by-layer assembly as well as thermodynamically driven orientation, we will introduce multifunctional nanocomposites, recently developed from our lab, from natural biomaterials including high crystalline cellulose nanofibers, naturally extracted electrically conductive melanin nanoparticles, and photosynthetic protein complexes. High electrical conductivity, high mechanical strength, and photoelectric sensibility are demonstrated by combination with biocompatibility. These composites can be used as key functional materials in wide range of biomedical device applications such as implantable circuits, biosensors, drug delivery carriers, and neural interfaces.