1. Laboratory of Applied Macromolecular Chemistry, School of Materials Science and Engineering; Gwangju Institute of Science and Technology (GIST); Gwangju 500-712 South Korea
2. Fire Protection Laboratory; National Institute of Standards; 136 Giza 12211 Egypt
3. Department of Nanobio Materials and Electronics (WCU); Gwangju Institute of Science and Technology (GIST); Gwangju 500-712 South Korea