1. Materials Science and Technology Division Oak Ridge National Laboratory Oak Ridge TN 37831 USA
2. Materials Science and Engineering Program University of Colorado Boulder Boulder CO 80309 USA
3. Postgraduate Programme in Materials Science and Engineering, Faculty of Animal Science and Food Engineering (FZEA) University of Sao Paulo (USP) Pirassununga SP 13635-900 Brazil
4. Center for Research, Technology and Education in Vitreous Materials Department of Materials Engineering Federal University of São Carlos São Carlos SP 13565-905 Brazil
5. Group of Advanced Functional Materials (MAFA), Department of Physics, Federal University of São Carlos (UFSCar) São Carlos SP 13565-905 Brazil