1. Centre
for Nanoporous Materials, School of Chemistry, The University of Manchester, Oxford Road, Manchester, M13 9PL, United Kingdom
2. Centre
for Materials Science and Nanotechnology, Department of Chemistry, University of Oslo, P.O.
Box 1126, 0315 Oslo, Norway
3. SINTEF
Materials and Chemistry, P.O. Box 124, Blindern, 0314 Oslo, Norway