Related by context. Frequent words. (Click for all words.) 65 nanosized 65 aragonite 62 manganese oxide 62 nacre 61 calcite 60 nitrogen atoms 60 waxy substance 60 salt crystals 60 nanobubbles 60 nanoclusters 59 striations 59 microstructures 59 titania 59 chromophore 59 crystal lattice 59 tetrahedral 58 calcareous 58 corundum 58 spinel 58 silicon atoms 58 silicate 58 membranous 58 silicates 58 olivine 57 siliceous 57 perovskite 57 diatoms 57 alternating layers 57 lunar soil 57 collagen fibers 57 zeolites 57 crystalline structure 57 crystalline 57 electrically conducting 56 clasts 56 filamentous 56 mica 56 interfacial 56 bilayer 56 SWNTs 56 kaolinite 56 dye molecules 56 filaments 56 macroscale 56 nanometer sized 56 micelles 56 threadlike 56 spherules 55 stalactite 55 iron oxides 55 naturally occurring mineral 55 hollow tubes 55 crystals 55 oxygen isotopes 55 setae 55 Fig. 1A 55 hydrocarbon molecules 55 nanostructure 55 monolayer 55 agglomerates 55 van der Waals 55 morphologies 55 vacuoles 55 feldspar 55 photochemistry 55 nanocrystalline 55 graphitic 55 titanium oxide 55 igneous rock 55 lithosphere 55 anionic 55 globular 55 carbonaceous 55 osmium 55 ultraviolet wavelengths 55 diffraction pattern 55 nanoscopic 55 porphyrin 54 iridescence 54 protoplanetary disk 54 anisotropic 54 copper oxides 54 polymerized 54 pyroxenite 54 thermally stable 54 outer crust 54 foraminifera 54 stippled 54 porphyrins 54 hydride 54 elemental composition 54 irregular shapes 54 exosphere 54 hydroxyapatite 54 quartz crystals 54 ellipsoid 54 isotope ratios 54 reddish color 54 tubules 54 pentagons 54 geometrical shapes