1. Istituto Italiano di Tecnologia (IIT), Nano Carbon Materials Laboratory, Via Morego 30, 16163 Genova (Italy)
2. Istituto Italiano di Tecnologia (IIT), Electron Microscopy Laboratory, Via Morego 30, 16163 Genova (Italy)
3. Trinity College Dublin, The University of Dublin, Trinity Biomedical Science Institute, School of Chemistry, 152‐160 Pearse Street, Dublin 2 (Ireland)
4. European Commission, Joint Research Centre, Institute for Health and Consumer Protection, Via E. Fermi 2749, 21027 Ispra, Varese (Italy)
5. University of Texas at El Paso (UTEP), Department of Chemistry, El Paso, Texas 79968 (USA)