[1] Curtin Univ, Nanochem Res Inst, Dept Chem, Perth, WA 6845, Australia
[2] Univ Warwick, Dept Chem, Coventry CV4 7AL, W Midlands, England
[3] Univ Munich, Dept Chem, D-81377 Munich, Germany
[4] Univ Maryland UMD, Ctr Energet Concepts Dev CED, Dept Mech Engn, College Pk, MD 20742 USA