作者机构:[1]School of Materials Science and Engineering, Nanchang University, Nanchang 330031, China, [2]Department of Science, Nanchang Institute of Technology, Nanchang 330099, China
相关基金:This work was supported by the National Natural Science Foundation of China (Grant Nos. 60661001, 60844008), the Program for Changjiang Scholars and Innovative Research Team in University (No. IRT0730), and the Program for Innovative Research Team of Nanchang University.