1. Department of Materials Science and Engineering, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854, United States
2. Institut für Physikalische Chemie, Westfälische Wilhelms-Universität Münster, Corrensstrasse 30, D48149 Münster, Germany
3. Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, via G. Campi 103, 41125, Modena, Italy
4. Science and Technology Division, Corning Incorporated, Corning, New York 14831, United States
5. São Carlos Institute of Physics, University of São Paulo, Avenida Trabalhador Saocarlense 400, São Carlos, SP 13566-590, Brazil