Related by context. Frequent words. (Click for all words.) 65 chitin 62 hydroxyapatite 62 calcite 59 ductility 59 spider silk 59 microstructures 58 crystalline structure 58 colloidal 58 nanoscopic 57 zeolites 57 aluminum oxide 57 nanocrystals 57 graphene sheets 57 iridescence 57 electrical conductivity 57 titanium oxide 56 iron oxides 56 silicate 56 crystalline 56 nanostructure 56 zirconia 56 nanotubes 56 crystals 56 keratin 56 monolayer 56 ductile 55 alternating layers 55 silicon nanowires 55 dentin 55 nanometers thick 55 nanorods 55 mica 55 inorganic materials 55 microstructure 54 olivine 54 silicates 54 outer shell 54 outer layer 54 filaments 54 calcium carbonate 54 fibrous 54 melanosomes 54 nanotube 54 Germanium 53 photonic crystals 53 nanometer sized 53 nanostructures 53 interfacial 53 fibers 53 Quantum dots 53 nanowires 53 nuclei 53 lattice 53 carbon nanotubes 53 graphene 53 enamel 52 thermal conductivity 52 anisotropic 52 nanospheres 52 apatite 52 fibrils 52 Nanowires 52 membrane 52 photonic crystal 52 membranes 52 tensile strength 52 graphite 52 nanofibers 52 polycrystalline 52 germanium 52 silicon carbide 52 luminescence 52 filament 52 cerium 52 macromolecules 52 crystal lattice 51 quartz crystals 51 oxidizes 51 endosperm 51 organic molecules 51 micron sized 51 glycoproteins 51 silica 51 polymeric 51 silicon oxide 51 biofilms 51 biocompatible 51 ultrafine 51 ruthenium 51 texture 50 polysaccharide 50 cultured pearls 50 dimer 50 pigments 50 conductivity 50 polymer coating 50 Nanotubes 50 metal alloys 50 translucency 50 semiconducting 50 phonons