1. Department of Materials Science and Engineering Research Institute of Advanced Materials Seoul National University Seoul 08826 Republic of Korea
2. Department of Materials Science and Engineering KAIST Institute for the Nanocentury Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
3. Department of Civil and Environmental Engineering Korea Advanced Institute of Science and Technology (KAIST) Daejeon 34141 Republic of Korea
4. Structural Safety & Prognosis Research Division Korea Atomic Energy Research Institute (KAERI) Daejeon 34057 Republic of Korea
5. Division of Materials Science and Engineering Silla University Busan 46958 Republic of Korea
6. Advanced Institute of Convergence Technology Seoul National University Suwon 16229 Republic of Korea