1. Surface Chemistry Laboratory of Electronic Materials,
Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Hyoja-Dong, Pohang-Si 790-784, Republic of Korea
2. Advanced Functional Nanomaterial
Laboratory, Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Hyoja-Dong, Pohang-Si 790-784, Republic of Korea
3. Photo-Electronic
Hybrids Research Center, Korea Institute of Science and Technology (KIST), Seoul 136-791, Republic of Korea
4. KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 136-701, Republic of Korea