1. Department of Chemistry, College of Science, Tikrit University, Tikrit 34001, Iraq
2. NanoScience Technology Center, University of Central Florida, Orlando, FL 32826, USA
3. Department of Chemistry, University of Central Florida, Orlando, FL 32826, USA
4. Department of Materials Science and Engineering, University of Central Florida, Orlando, FL 32826, USA
5. The College of Optics and Photonics (CREOL), University of Central Florida, Orlando, FL 32826, USA