1. Center for Optoelectronic Materials and Devices, School of Polymer Science and Engineering, The University of Southern Mississippi, Hattiesburg, MS 39406, USA.
2. Department of Chemistry & Biochemistry, The University of Alabama, Tuscaloosa, AL 35487-0336, USA.
3. Dave C. Swalm School of Chemical Engineering and Center for Advanced Vehicular Systems, Mississippi State University, Mississippi State, MS 39762, USA.
4. Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA 70803, USA.
5. Molecular Foundry, Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, CA 94720, USA.
6. Department of Chemical and Environmental Engineering and Materials Science and Engineering Program, University of California, Riverside, Riverside, CA 92521, USA.