Related by context. Frequent words. (Click for all words.) 53 crystalline structure 50 porphyrins 48 oscillatory 48 monolayers 48 fibrils 48 alternating layers 48 porphyrin 48 graphene sheets 47 complexed 47 microstructures 47 nuclei 47 exciton 46 pentagonal 46 mycelium 46 carbon atom 46 polymer matrix 46 macromolecules 46 crystalline 46 oxide layer 46 nitrogen atoms 46 torus 45 threadlike 45 hexagonal 45 nanoscopic 45 carbonaceous 45 nanoclusters 45 whorls 45 Fig. 1A 45 baryons 45 micelles 45 helices 45 manganese oxide 45 voxel 45 amide 45 tetrahedral 45 organic inorganic 45 monolayer 44 magnetic beads 44 crystals 44 dye molecules 44 tubules 44 crystal lattice 44 filaments 44 morphologies 44 matrix 44 protoplanetary disk 44 nanometer sized 44 biological molecules 44 block copolymer 44 concentric rings 44 Bose Einstein condensate 44 actin filaments 44 microchannels 44 silicon atoms 44 atoms 44 pentagons 44 intercalated 44 sepals 44 hydrocarbon molecules 43 protein complexes 43 amyloid fibrils 43 multicomponent 43 electron spins 43 outer layer 43 mafic volcanic 43 singularities 43 planetesimals 43 outer layers 43 geometrical shapes 43 lattices 43 irregular shapes 43 subunits 43 molecules 43 oxygen atoms 43 hollow tubes 43 interbedded 43 dimer 43 orbitals 42 nanosized 42 alkyl 42 striations 42 magnetic particles 42 rubidium atoms 42 hydrogen atoms 42 hydroxide 42 planetary nebulae 41 hexagons 41 collagen fibers 41 voxels 41 matrixes 41 ribozyme 41 lattice 41 active galactic nuclei 41 quanta 41 thymine 41 sawtooth 41 ovoid 41 protein fragment 41 SWNTs 41 prismatic 41 RNA molecule