1. Department
of Chemistry, University of North Texas, Denton, Texas 76203, United States
2. Department
of Physics, UNESP - Sao Paulo State University, Bauru, SP, 17033-360, Brazil
3. Department
of Physics, University of Texas at Dallas, Richardson, Texas 75080, United States
4. Department
of Materials Science and Engineering, University of Texas at Dallas, Richardson, Texas 75080, United
States
5. Novartis Institutes of Biomedical Research, Chemistry, Fort Worth, Texas
76134, United States