1. Carbon Composite Materials Research Center, Institute of Advanced Composite Materials, Korea Institute of Science and Technology, Chudong-ro 92, Bondong-eup, Wanju-gun, Jeollabuk-do 565-905, Republic of Korea
2. School of Materials Science and Engineering, Gwangju Institute of Science and Technology (GIST), 261 Cheomdan-gwagiro, Buk-Gu, Gwangju 500-712, Republic of Korea
3. Department of Chemistry Education and Department of Pharmacy, Kyungpook National University, Daegu 41566, Republic of Korea