P.S. Liu is a professor in the College of Nuclear Science and Technology at Beijing Normal University (BNU), Beijing, China. He graduated at Chinese Academy of Science in 1998, and received his doctor's degree in materials science and engineering. He has ever served as the committeeman of the academic committee of the Key Laboratory of Beam Technology and Material Modification of Ministry of Education of China, and the first director of Material Physics Division and then the vice director of Nuclear Physics Research Institute at BNU. Investigating on porous materials and high-temperature coatings for quite a number of years, he has published extensively in the area of materials science and engineering as the first author, including about 60 SCI papers, more than 40 EI articles, and 6 academic books. In addition, he holds 8 Chinese invention patents as the first originator. Dr. G. F. Chen, Ph.D. from the Institute of Metal Research, Chinese Academy of Sciences; Alexander von Humboldt Fellow in the Max Planck-Institute of Metals Research in Germany; research scientist at the Au4 National Physical Laboratory in London; research specialist at Cleveland State University in Cleveland, Ohio, professor at the Northwestern Polytechnic University in Fremont, California, and now an expert in corporate technology at Siemens Ltd., in Beijing. He has more than 20 years of experience in materials research and development, particularly with energy materials.