1. Department of Chemistry, University College of Engineering, BIT Campus, Anna University, Tiruchirappalli, Tamil Nadu, India
2. Department of Physics, University College of Engineering, BIT Campus, Anna University, Tiruchirappalli, Tamil Nadu, India
3. Department of Physics, Erode Sengunthar Engineering College (Autonomous), Erode, Tamil Nadu, India
4. Department of Bio-Technology, University College of Engineering, BIT Campus, Anna University, Tiruchirappalli, Tamil Nadu, India