[1] Univ Antwerp, Dept Engn Management, Antwerp, Belgium
[2] Flanders MakeUAntwerp, B-2000 Antwerp, Belgium
[3] Univ Antwerp, Inst Environm & Sustainable Dev, Antwerp, Belgium
[4] 19 Greenway, York YO32 3FE, England
[5] Imperial Coll London, 109 Weeks Bldg,16-18 Princes Gardens, London SW7 1NE, England
[6] Univ Ghent, Dept Environm, Forest & Nat Lab, Geraardsbergsesteenweg 267, B-9090 Melle Gontrode, Belgium
[7] Nanolab Ctr Excellence, Prinsstr 13, B-2000 Antwerp, Belgium