1. Ph.D. Candidate, Dept. of Materials Science and Engineering, African Univ. of Science and Technology, Km 10 Airport Rd., P.M.B 681, Garki, Abuja, Nigeria; and Lecturer II, Dept. of Civil Engineering, Nigerian Turkish Nile Univ., Abuja, Nigeria.
2. Ph.D. Candidate, Dept. of Materials Science and Engineering, African Univ. of Science and Technology, Km 10 Airport Rd., P.M.B 681, Garki, Abuja, Nigeria; and Assistant Lecturer, Dept. of Materials Science and Engineering, Kwara State Univ., Ilorin, Nigeria.
3. Ph.D. Candidate, Dept. of Materials Science and Engineering, African Univ. of Science and Technology, Km 10 Airport Rd., P.M.B 681, Garki, Abuja, Nigeria; and Assistant Lecturer, Univ. of Ghana, Accra, Ghana.
4. Deputy Director, Biotechnology and Genetic Engineering Advanced Laboratory, Sheda Science and Technology Complex, Km 32 Abuja-Lokoja Expressway, P.M.B 186, Garki, Abuja, Nigeria.
5. Professor, Dept. of Mechanical and Aerospace Engineering, Princeton Univ., 1 Olden St., Princeton, NJ 08544; and Professor, Dept. of Materials Science and Engineering, African Univ. of Science and Technology, Km 10 Airport Rd., P.M.B 681, Garki, Abuja, Nigeria (corresponding author).