Jeong Min BaikAssociate Professor atUlsan National Institute of Science and Technology Jianhua HaoThe Hong Kong Polytechnic University Weiguo HuProfessor atBeijing Institute of Nanoenergy and Nanosystems Zhou LiBeijing Institute of Nanoenergy and Nanosystem,CAS Xudong WangUniversity of Wisconsin--Madison Zhong Lin WangRegents Prof atGeorgia Institute of Technology Wenzhuo WuPurdue University Haixia Zhang