[1] Columbia Univ, Dept Chem Engn, 500 West 120th St, New York, NY 10027 USA
[2] Univ Camerino, Sch Sci & Technol, Via St Agostino 1, I-62032 Camerino, Italy
[3] Univ South Carolina, Dept Chem & Biochem, Columbia, SC 29208 USA
[4] CEA Saclay, Lab Leon Brillouin, F-91191 Gif Sur Yvette, France