Surfactant-Assisted Hydrothermal Synthesis of PMN-PT Nanorods

The effects of surfactant polyacrylate acid (PAA) on shape evolution of 0.7Pb(Mg(1/3)Nb(2/3))O(3)-0.3PbTiO(3) (0.7PMN-0.3PT) nanorods were studied. The results revealed that the polyacrylic acid content had great influence on the morphology of 0.7PMN-0.3PT. With increasing PAA concentration from 0.45 to 0.82 g/ml, the ratio of perovskite phase (PMN-PT nanorod) increased, while the ratio of pyrochlore phase decreased. When the PAA concentration was 0.82 g/ml, pure 0.7PMN-0.3PT nanorods were obtained. However, when PAA concentration was higher than 0.82 g/ml, the excess of PAA would hindered their [100] orientation growth. The piezoelectric coefficient d(33) of 0.7PMN-0.3PT nanorod was obtained by linear fitting, and the d(33) value was 409 pm/V.