1. Department of Industrial Chemistry, College of Natural and Applied Sciences, Addis Ababa Science and Technology University, P.O. Box 16417, Addis Ababa, Ethiopia
2. Nanotechnology Centre of Excellence, Addis Ababa Science and Technology University, P.O. Box 16417, Addis Ababa, Ethiopia
3. Department of Chemistry, College of Natural Sciences, Wollo University, P.O. Box 1145, Dessie, Ethiopia
4. Department of Chemistry, College of Natural and Computational Sciences, Mekelle University, P.O. Box 231, Mekelle, Ethiopia