1. Laboratory of Nanoscale Biology; School of Engineering, EPFL, STI IBI-STI LBEN BM 5134 (Bâtiment BM); Station 17 CH-1015 Lausanne Switzerland
2. Laboratory of Photochemistry and Spectroscopy, Department of Chemistry; KU Leuven; Celestijnenlaan 200F B-3001 Heverlee Belgium
3. School of Chemistry; University of Birmingham; Edgbaston Birmingham B15 2TT UK