1. Department of Chemistry; Allama Iqbal Open University; Islamabad Pakistan.
2. Department of Chemistry; Materials Laboratory; Mirpur University of Science & Technology (MUST); Mirpur- 10250 (AJK) Pakistan.
3. Department of Physics; University of Sargodha; Sargodha, Punjab Pakistan.
4. National Center for Nanotechnology; Department of Metallurgy & Material Engineering; Pakistan Institute of Engineering and Applied Sciences; Islamabad Pakistan.