Paper Title
Relaxer PMN-PZT Functionalized Graphene Oxide Piezoelectric Nanocomposites For Energy Harvesters, Sensors, Actuators And Biomedical Applications

This paper highlights the development of 2D ultra thin Graphene Oxide nanocomposites reduced by relaxor piezoelectric PMN-PZT for biomedical smart (both sensing and actuating). The Graphene Oxide (GO) reduced by (PMNPZT: 0.5Pb(Mg1/3Nb2/3)O3-0.5Pb(Zr0.53Ti0.47)O 3 were synthesized and characterized for phase formation and microstructure, dielectric and piezoelectric studies. PMN-PZT was prepared by coloumbite precursor method while GO and FGO (i.e., PMN-PZT coated GO) nanocomposites were prepared by Hummer’s method. A pseudocubic phase was predominant in pure PMN-PZT. GO could enhance surfacial properties. In other words, on one hand GO enhances large surfacial contributions to the prototype due to its 2D flakes supporting to functionalized PMN-PZT particles. On the other hand, GO’s interaction with hosts’ β phase piezoelectric nature resulting in competitive piezoelectric properties. The piezoelectric charge coefficient d 33 = 179x10-12C/N for pure PMN- PZT whereas FGO had shown 164 x10-12C/N were found in these nanocomposites, which are suitable for energy harvesting, sensors and actuator applications. Index Terms— Biomedical applications, Graphene Oxide, Relaxer PMN-PZT, Dielectric and Piezoelectric Properties.