Fabrication of a Vertically Aligned Ferroelectric Perovskite Nanowire Array on Conducting Substrate

Abstract

A new fabrication process of a vertically aligned ferroelectric perovskite PbTiO 3 nanowire array on Ti substrate is presented. Polycrystalline TiO 2 nanotubes are first fabricated by anodic oxidation of Ti foil and then treated hydrothermally in a lead acetate solution to obtain single-crystalline nanowires. This nanotube-to-nanowire transformation on conducting substrate could be described by a swelling-and-rupture mechanism, in which individually well-developed nanotubes are swollen and broken along the friction planes because of difference in the directions of expansion force. Nanowires with a uniform diameter of ca. 40 nm and a length of 10 μm show single-crystalline nature over the entire length of nanowires and ultrahigh density corresponding to ca. 0.22 Tb inch -2 . The ferroelectric property of individual PbTiO 3 nanowires and whole area of nanowire arrays has been demonstrated by piezo-response force microscopy.

Pyroelectrically Induced Pyro-Electro-Chemical Catalytic Activity of BaTiO3 Nanofibers under Room-Temperature Cold–Hot Cycle Excitations

“…Our pyro-electro-chemical catalysis is originated from the ferro-/pyroelectric effect. In general, the ferro-/piezoelectric performance of the aligned nanofiber ferroelectric arrays can be characterized through Piezoresponse Force Microscopy (PFM) [18][19][20]. However, unlike arrays, our as-prepared BaTiO3 nanofiber powders are orderless.…”

Synthesis, physics, and applications of ferroelectric nanomaterials

“…Deposition of ferroelectric nanoislands and nanorods using block copolymers [78,80] and titania nanotube [81] templates has led to potential storage densities exceeding the Tbit/in 2 threshold, and formation of PbTiO 3 and BiFeO 3 nanodots with dimensions of the order of ∼10 nm has been realized in a controlled fashion using dip pen lithography on SrTiO 3 substrates (Fig. 9).…”

Polarization-Modified Upconversion Luminescence in Er-Doped Single-Crystal Perovskite PbTiO3 Nanofibers

“…30 In our recent work, single-crystal PTO nanofibers has been prepared and determined to grow along [001] (the c axis), 31 exhibiting obvious tetragonality and spontaneous polarization along this axis 31,32 . When doped with Er 3+ ions, the nanofibers demonstrated the typical UC emission of green and red bands.…”