1. Department
of Chemistry, B.B.K. D.A.V. College for Women, Amritsar 143005, Punjab, India
2. Nanotechnology
Research Laboratory, College of North Atlantic, Labrador City, NL A2V 2K7 Canada
3. Department
of Natural and Applied Sciences, University of Wisconsin−Green Bay, 2420 Nicolet Drive, Green
Bay, Wisconsin 54311-7001, United States