1. Centre for Nanoscience and Technology, Department of Basic SciencesAmal Jyothi College of Engineering, Kanjirappally Kottayam 686518 Kerala India
2. International and Inter University Centre for Nanoscience and NanotechnologyMahatma Gandhi University Kottayam 686550 Kerala India
3. Department of ChemistryVimala College (Autonomous) Thrissur 68009 Kerala India