About the Authors

Silvio Romano

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Software, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

Affiliation Physics Department, Università degli Studi di Napoli “Federico II”, Napoli, Italy

Annalisa Fierro

Contributed equally to this work with: Annalisa Fierro, Antonella Liccardo

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Software, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

annalisa.fierro@spin.cnr.it

Affiliation CNR-SPIN, Napoli, Italy

Antonella Liccardo

Contributed equally to this work with: Annalisa Fierro, Antonella Liccardo

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Software, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

Affiliation Physics Department, Università degli Studi di Napoli “Federico II”, Napoli, Italy

Competing Interests

The authors have declared that no competing interests exist.