About the Authors

Àngel Gómez-Sicilia

Affiliations Intituto Cajal/CSIC, Madrid, Spain, Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia),Madrid, Spain

Mateusz Sikora

Affiliation Institute of Science and Technology Austria, Klosterneuburg, Austria

Marek Cieplak

mc@ifpan.edu.pl

Affiliation Instytut Fizyki PAN, Warsaw, Poland

Mariano Carrión-Vázquez

Affiliations Intituto Cajal/CSIC, Madrid, Spain, Instituto Madrileño de Estudios Avanzados en Nanociencia (IMDEA-Nanociencia),Madrid, Spain

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: ÀGS MC MCV. Performed the experiments: ÀGS MS. Analyzed the data: ÀGS MC. Contributed reagents/materials/analysis tools: MS MC. Wrote the paper: ÀGS MC MCV MS.