1
Materials Science Group, Department of Physics, Chemistry, and Mathematics Alabama A&M University, Normal (Huntsville), AL 35762, USA
2
International Clean Water Institute, Manassas, VA 20112, USA
3
Biomedical Engineering and Nanotechnologies Institute, Riga Technical University, Riga, LV-1658, Latvia
4
Henry Ford Health System - Detroit, MI 48255, USA
1
Tel.: 2563728109, fax: 2563725622
E-mail:
ashok.batra@aamu.edu