Dr. Jie Ma, Laboratory of Environmental & Energy Nanomaterials (NANOEE), State Key Laboratory of Pollution Control and Resource Reuse, College of Environmental Science and Engineering, Tongji University, China
E-mail: jma@tongji.edu.cn

Dr. A. M. Elseman, Electronic and Magnetic Materials Division, Advanced Materials Department, Central Metallurgical Research & Development Institute (CMRDI), Egypt
Email: AhmedMourtada5555@yahoo.com,AhmedMourtada@hotmail.com