Related by context. Frequent words. (Click for all words.) 64 hexagonal 62 rectangles 58 spherical 58 hexagon 57 geometric shapes 56 rectangle 55 triangles 55 rectangular 55 vertices 54 evenly spaced 53 lattice 52 concentric rings 52 shapes 51 filaments 51 cylindrical 51 colored dots 51 oblong 51 cubes 50 waveguides 50 helix 49 spacetime 49 DNA strands 49 carbon atoms 49 ellipse 49 dowels 49 geometric forms 49 concentric 48 atoms 48 geometric 48 symmetries 48 concave 48 conical 48 geometrical 48 microstructures 48 symmetrically 48 concentric circles 48 irregularly shaped 48 double helix 47 monomers 47 dots 47 curved 47 diagonals 47 translucent 47 squares 47 blobs 47 oval shaped 47 whorls 46 honeycomb 46 nuclei 46 oxygen atoms 46 geometries 45 cube 45 nanotubes 45 semiconducting 45 nanowires 45 metamaterial 45 helical 45 nucleotides 45 convex 45 fibrils 45 molecules 45 wavy 45 clumped together 45 gridded 45 crystals 45 hydrogen atoms 44 nanostructure 44 cone shaped 44 prisms 44 vortices 44 lenticular 44 pinwheel 44 matrix 44 ridged 44 subunits 44 superfluid 44 monolayer 44 geometry 44 macroscopic 44 calcite 44 pyramidal 44 teardrop shaped 44 planar 43 substrate 43 oddly shaped 43 fullerenes 43 egg carton 43 horizontally 43 orb 43 geometric patterns 43 multicolored 43 optical microscope 43 Nanotubes 43 nanostructures 43 polygons 43 indentations 43 diagonally 43 nanocrystals 43 superposition 43 collaged 43 geometric designs