1. Department of Chemistry, St. Joseph's College (Autonomous) Devagiri, Calicut Kerala 673 008 India
2. Centre for Nano Science and TechnologyDepartment of Basic Sciences, Amal Jyothi College of Engineering Kanjirapally Kerala 686 518 India
3. School of Chemical Sciences and International and Inter University Centre for Nanoscience and NanotechnologyMahatma Gandhi University Kottayam Kerala 686 560 India