About the Authors

Giuseppe Maccari

giuseppe.maccari@iit.it

Affiliation Center for Nanotechnology Innovation @NEST, Istituto Italiano di Tecnologia, Pisa, Italy

Mariagrazia Di Luca

Affiliation NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, Pisa, Italy

Riccardo Nifosí

Affiliation NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, Pisa, Italy

Francesco Cardarelli

Affiliation Center for Nanotechnology Innovation @NEST, Istituto Italiano di Tecnologia, Pisa, Italy

Giovanni Signore

Affiliation Center for Nanotechnology Innovation @NEST, Istituto Italiano di Tecnologia, Pisa, Italy

Claudia Boccardi

Affiliation Center for Nanotechnology Innovation @NEST, Istituto Italiano di Tecnologia, Pisa, Italy

Angelo Bifone

Affiliation Center for Nanotechnology Innovation @NEST, Istituto Italiano di Tecnologia, Pisa, Italy

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: GM MDL RN FC GS AB. Performed the experiments: GM MDL RN GS CB. Analyzed the data: GM MDL RN. Contributed reagents/materials/analysis tools: GM MDL FC GS CB. Wrote the paper: GM MDL RN FC.