1. Department of Materials Science and Engineering, National Tsing Hua University, No. 101, Section 2 Kuang-Fu Road, Hsinchu, Taiwan 300, Republic of China, Graduate Institute of Electro-Optical Engineering and Department of Electrical Engineering, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 106, Taiwan, Republic of China, and Advanced Materials Laboratory and Nanomaterials Laboratory, Nanoscale Materials Center, National Institute for Materials Science (NIMS), Namiki 1-1, Tsukuba,...