1. Thin Film Research LabDepartment of Physics Union Christian College Aluva Kerala 683102 India
2. Department of Physics Sree Sankara College Kalady Kerala 683574 India
3. Department of Biosciences Union Christian College Aluva Kerala 683102 India
4. Facultad de Ingenieria Mecanica y Electrica Universidad Autonoma de Nuevo Leon Av. Universidad s/n, Cd. Universitaria, San Nicolas de los Garza 66455 Nuevo Leon Mexico