1. Department
of Chemistry, B.B.K. D.A.V. College for Women, Amritsar 143005, Punjab, India
2. Materials & Nanotechnology Research Laboratory, College of North Atlantic, Labrador City, NL A2 V 2K7 Canada
3. Department
of Natural and Applied Sciences, University of Wisconsin—Green Bay, 2420 Nicolet Drive, Green Bay, Wisconsin 54311-7001, United States