Synthesis of Single-Crystalline Perovskite Nanorods Composed of Barium Titanate and Strontium Titanate

Abstract

We report the solution-based synthesis of single-crystalline nanorods composed of barium titanate (BaTiO3) and strontium titanate (SrTiO3), which yields well-isolated nanorods with diameters ranging from 5 to 60 nm and lengths reaching up to >10 mum. Electron microscopy and diffraction measurements show that these nanorods are composed of single-crystalline cubic perovskite BaTiO3 and SrTiO3 with a principal axis of the unit cell preferentially aligned along the wire length. These BaTiO3 and SrTiO3 nanorods should provide promising materials for fundamental investigations on nanoscale ferroelectricity, piezoelectricity, and paraelectricity.

Ferroelectrics at the nanoscale

“…signal certainly suggests that polar orientations initially lie parallel to the nanowire axes [23,24], and Schilling et al have clearly shown that local reorientations of polarization can be induced simply through changes in nanowire dimensions [25].…”

Erratum: Fabrication of Ca, Zr doped BaTiO3 ferroelectric nanofibers by electrospinning

“…BCTZ ceramics shows maximum polarization P max = 13 μC/cm 2 at E = 3 kV/mm, remnant polarization P r = 6.2 μC/cm 2 and coercive field E c = 430 V/mm. Figure 4 shows Raman spectra of the electrospun nanofibers calcined at 700 o C and bulk ceramic sample sintered at 1450 o C. Peaks at 260, 306, 520, and 720 cm -1 correspond to the BaTiO 3 tetragonal phase [9][10][11][12][13] whereas a low intensive band around 181 cm -1 is assigned to an A 1 (LO) optical mode in rhombohedral phase in crystallized samples [13]. Comparing Raman spectra of nanofibers and bulk BCTZ, we found Raman peaks at 518 and 718 cm -1 for bulk ceramics shift, respectively, to 523 and 724 cm -1 in nanofibers.…”

“…1 Introduction Low dimensional nanostructured ferroelectric materials such as nanowires, nanofibers and nanoribbons have attracted extensive interest since they can be used as essential parts in nanoelectronic and nanophotonic devices [1][2][3]. Electrospining method to fabricate ultra-thin threads was patented in 1934 [4] and since mid1990s was proved as a versatile technique to produce different high aspect ratio nanofeatures including nanofibers and nanotubes [5].…”

A new sintering approach to ceramics at low temperature from Ba(ZrxTi1-x)O3 nanoparticles doped by ZnO

“…Hydrothermal method is one of the most popular approaches to obtain the perovskite nanostructures directly from solution, but the synthesis process is often conducted at elevated temperature (typically 100-280 ℃) and/or under relatively high pressure to improve the crystallinity of the products. To further simplify the process and lower the processing temperature and pressure, several routs have been achieved [4][5][6][7][8][9][10][11][12]. Even more, perovskite structured nanocrystals with much complicated compositions have been developed based on above research works to develop new functional ceramics [13][14][15][16][17].…”