Related by context. Frequent words. (Click for all words.) 63 electron density 62 excitations 60 photons 60 phonons 60 excitons 60 electrons 59 Photons 59 anisotropy 59 electron beams 58 muons 58 antiprotons 58 alpha particles 58 magnetic fields 58 magnetization 58 dye molecules 58 ribozyme 57 magnetic flux 57 electron 57 WIMPs 57 electron spin 57 bosons 57 exciton 57 aerosol particles 56 biomolecule 56 terahertz radiation 56 GeV 56 Hawking radiation 56 photon 56 FRET 56 muon 56 active galactic nuclei 56 amplitudes 55 X ray emission 55 shorter wavelengths 55 vortices 55 fermions 55 ions 55 biological molecules 55 subatomic particle 55 dimers 55 osmium 55 X ray beam 55 Type Ia supernovae 55 QDs 55 SWNTs 55 spatial dimensions 55 redshifts 55 hydrogen ions 55 cuprates 55 Fig. 1A 55 helices 55 atomic nuclei 54 spectroscopic 54 positrons 54 chirality 54 dispersive 54 photonic crystal 54 analyte 54 dopants 54 nuclei 54 ionized gas 54 MeV 54 gravitational lensing 54 Brownian motion 53 gravitational wave 53 numerical simulations 53 dopant 53 particle 53 gravitational waves 53 ionize 53 plasmons 53 superfluid 53 particles 53 isotropic 53 NADH 53 neutrons 53 Gamma rays 53 anions 53 gamma rays 53 Cosmic rays 53 accretion disk 53 conductance 53 serine 53 frequency comb 53 crystal lattice 53 subatomic particles 53 neutrino 53 reactants 53 nanometer sized 53 planetary nebulae 52 atoms 52 cosmic rays 52 molecules 52 absorbance 52 interfacial 52 anion 52 hydrogen atom 52 atomic nucleus 52 iron oxide nanoparticles 52 laser pulses 52 X ray beams