1. Center for Polymers and Organic Solids University of California Santa Barbara (UCSB) Santa Barbara CA 93106 USA
2. Department of Physics North Carolina State University Raleigh NC 27695-7907 USA
3. Department of Chemical Engineering University of California Santa Barbara CA 93106 USA
4. Graduate School of Science and Engineering Kindai University Higashiosaka City Osaka 577-8502 Japan
5. Advanced Low-Dimensional Materials Center Donghua University Shanghai 201620 China
6. CNRS Centrale Lille Institut UMR 8181–UCCS– Unité de Catalyse et Chimie du Solide University of Lille 59000 Lille France