1. Physics Department and Center of Excellence for Nanostructured Materials, University of Trieste, Via Valerio 2, I-34127 Trieste, Italy, Laboratorio “Nanotecnologie per l’Energia”, Consorzio per la Fisica, S.S. 14 Km 163.5, 34149 Trieste, Italy, Laboratorio TASC INFM-CNR, AREA Science Park, S.S. 14 Km 163.5, 34012 Trieste, Italy, Department of Earth Sciences and Thomas Young Centre@UCL, University College London, Gower Street, London WC1E 6BT, United Kingdom, Department of Physics and Astronomy,...