1. Department of Mechanical Engineering, RajaRajeswari College of Engineering, Bangalore, India;
2. Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Hat-Yai, Thailand;
3. Department of Chemistry, RV College of Engineering, Bangalore, India;
4. R&D Center, Department of Physics, RajaRajeswari College of Engineering, Bangalore, India