1. Organic Nano-Piezoelectric
Device Laboratory, Department of Physics Jadavpur University Kolkata700032, India
2. Department
of Chemistry, Assam University, Silchar 788011, India
3. Materials Science Centre, Indian Institute of Technology (IIT), Kharagpur 721302, India
4. Brandenburgische Technische Universität Cottbus-Senftenberg, Angewandte Physik-Sensorik, K.-Wachsmann-Allee 17, 03046 Cottbus, Germany