March: Danyang Wang and Dewei Chu, "Morphology control of lead-free piezoelectric (Bi0.5Na0.5)TiO3 nanofibres via hydrothermal route
Authored by Mohammad Bagher Gassemain, Qianru Lin, Esmaeil Adabifiroozjaei, FeiFei Wang, Dewei Chu and Danyang Wang
A-site complex perovskite (Bi1/2Na1/2)TiO3 (BNT) has been recognised as a leading lead-free candidate owing to its marked remanent polarization and piezoelectric coefficients. In this work, BNT nanostructures were synthesised using a low-temperature hydrothermal technique. It is found the phase and morphology of the products are strongly dependent on the composition and concentration of the precursors, as well as the processing conditions. Through optimising the synthesis parameters, well-crystallized BNT nanofibers with 150 - 200 nm in diameter and ~5 µm in length were obtained. The BNT fibres show a pure perovskite phase with (011) orientation along the length direction. A piezoelectric constant of d33 = ~15 pm/V in the diameter direction was observed for these BNT nanofibers. These promising environmentally-friendly BNT nanofibers suggest the great potential in the applications of next generation nanodevices.
Read the full paper, as published in ACS Advances (Volume 7, Issue 25, 2017, pp15020-15026.