Abstract
Barium titanate-substituted bismuth titanate ((Bi0.5Na0.5)0.92Ba0.08TiO3, BNT–BT0.08) nanotubes were fabricated using sol–gel chemistry, spin casting, and a porous polycarbonate membrane template. The structure and morphology of the tubes have been investigated by scanning electron microscopy and transmission electron microscopy. The diameter and length of these tubes were about 650 nm and 20 μm, respectively, and their wall thickness was about 50 nm. The tubes were polycrystalline with average grain size of ~40 nm. The BNT–BT0.08 nanotubes exhibited ferroelectric behavior as evidenced by saturated piezoresponse hysteresis loops and phase switching. BNT–BT0.08 piezoelectric nanotubes promise novel device architectures and enhanced electric properties.
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