About the Authors
Department of Polymer Science and Chemical Engineering, Pusan National University, Busan, South Korea
Department of Chemistry, Technische Universität Berlin, Franklinstrasse, Berlin, Germany
Department of Molecular Science and Technology, Ajou University, Suwon, South Korea
Department of Applied Chemistry and Biological Engineering, Ajou University, Suwon, South Korea
The authors have declared that no competing interests exist.
Conceived and designed the experiments: NS SGL. Performed the experiments: NS SS GR. Analyzed the data: NS SGL HJP THY. Contributed reagents/materials/analysis tools: SGL NB. Wrote the paper: NS THY SGL.