Fumagalli L.Esteban-Ferrer D.Cuervo A.Carrascosa J.L.Gomila G.2020-12-152020-12-152012http://hdl.handle.net/20.500.12614/2243enAtribuciĆ³n-NoComercial-SinDerivadas 3.0 EspaƱaLabel-free identification of single dielectric nanoparticles and viruses with ultraweak polarization forcesresearch article10.1038/nmat3369open access