Related by context. Frequent words. (Click for all words.) 69 silicon atoms 67 nitrogen atoms 67 oxygen atom 67 carbon atom 65 porphyrin 65 chromophore 64 oxygen atoms 64 dimers 63 amide 63 dye molecules 63 bilayer 63 adsorbed 63 helices 62 electrically conducting 62 dimer 62 fullerene 62 hydrogen atoms 62 thiol 62 crystal lattice 61 porphyrins 61 hydrocarbon molecules 61 carbon atoms 61 orbitals 61 aliphatic 60 excitons 60 manganese oxide 60 exciton 60 anion 60 adenine 60 histidine 60 hydroxide 60 thymine 60 hollow tubes 60 anions 59 actin filaments 59 guanine 59 nanosized 59 polymer matrix 59 molecule 59 reactants 59 semiconducting 59 SWNTs 58 molecularly 58 biomolecule 58 alkanes 58 alkyl 58 covalent 58 hydrogen atom 58 cytosol 58 dopant 58 osmium 58 metal ions 58 molecules 58 block copolymer 58 nanospheres 58 electron spins 58 polypeptides 58 mannose 58 adsorb 58 amyloid fibrils 57 fermions 57 silicon oxide 57 phonons 57 bosons 57 nanoribbons 57 hydrogen ions 57 electrochemical reaction 57 dopants 57 atoms 57 tetrahedral 57 cuprates 57 chemically inert 57 liquid droplets 57 SWCNTs 57 protein fragment 57 lipophilic 57 fibrils 57 nanocrystalline 57 SiO 2 57 excitations 57 silicates 57 filaments 57 graphene sheets 57 hydride 57 chromophores 56 monolayers 56 ribose 56 aqueous solution 56 antiprotons 56 alternating layers 56 biological molecules 56 carbons 56 reactant 56 nanoscopic 56 complexed 56 lamina 56 aldehyde 56 alpha particles 56 Fig. 1A 56 microstructures 56 bile acid