1. DTU Chemistry, Technical University of Denmark, Kemitorvet Bldg 207, DK-2800 Kgs. Lyngby, Denmark
2. NTNU—Norwegian University of Science and Technology, N-7491 Trondheim, Norway
3. Istituto Officina dei Materiali IOM-CNR and Dipartimento di Scienze Chimiche e Farmaceutiche, Università degli Studi di Trieste, I-34121 Trieste, Italy