[1] Texas Christian Univ, Dept Chem, Ft Worth, TX 76109 USA
[2] Kings Coll London, Dept Phys, London WC2R 2NS, England
[3] CNR, NEST, Ist Nanosci, Pisa, Italy
[4] Scuola Normale Super Pisa, Pisa, Italy
[5] Eidgenoss Tech Hsch Zurich, Dept Chem & Appl Biosci, CH-8093 Zurich, Switzerland
[6] Univ Svizzera Italiana, Ist Sci Computaz, Fac Informat, CH-6900 Lugano, Switzerland
[7] Univ Texas Dallas, Dept Chem & Biochem, Richardson, TX 75080 USA
[8] Univ Texas Dallas, Dept Mat Sci & Engn, Richardson, TX 75080 USA
[9] Univ Appl Sci & Arts Southern Switzerland, Dept Innovat Technol, Galleria 2,Via Cantonale 2c, CH-6928 Manno, Switzerland
[10] Univ Sharjah, Dept Chem, Sharjah, U Arab Emirates