[1] Univ Nova Lisboa, Fac Ciencias & Tecnol, Dept Quim, REQUIMTE, P-2829516 Caparica, Portugal
[2] Univ Tecn Lisboa, Inst Super Tecn, CQFM, P-1096 Lisbon, Portugal
[3] Univ Tecn Lisboa, Inst Super Tecn, Inst Nanosci & Nanotechnol IN, Dept Engn Quim & Biol, P-1096 Lisbon, Portugal