One‐Dimensional Ferroelectric Nanostructures: Synthesis, Properties, and Applications

Abstract

One‐dimensional (1D) ferroelectric nanostructures, such as nanowires, nanorods, nanotubes, nanobelts, and nanofibers, have been studied with increasing intensity in recent years. Because of their excellent ferroelectric, ferroelastic, pyroelectric, piezoelectric, inverse piezoelectric, ferroelectric‐photovoltaic (FE‐PV), and other unique physical properties, 1D ferroelectric nanostructures have been widely used in energy‐harvesting devices, nonvolatile random access memory applications, nanoelectromechanical systems, advanced sensors, FE‐PV devices, and photocatalysis mechanisms. This review summarizes the current state of 1D ferroelectric nanostructures and provides an overview of the synthesis methods, properties, and practical applications of 1D nanostructures. Finally, the prospects for future investigations are outlined.

Recent Progress in Photocatalytic CO2 Reduction Over Perovskite Oxides

“…A 87.7% charge separation efficiency was achieved for TiO 2 @SrTiO 3 core‐shell nanowires, which is due to the 1‐D nanostructure‐induced directed electron transmission and also a ferroelectric effect caused by lattice distortion at the interface . The same distortion‐induced ferroelectric effect exists in many perovskite oxides . The intrinsic electric field promotes the directional migration of photoexcited electrons and holes, thereby improving the overall charge separation efficiency of the catalyst.…”

“…Adjustable bulk and surface components of metal oxides provide good opportunity to modify the photoexcitation and CO 2 activation process, thus contribute to enhanced conversion rate and selectivity . Among them, perovskite oxides of general formula ABO 3 demonstrate great potential in the development of solar cells, solid oxide fuel cells, photo(electro)catalysts and ferroelectrics . Typical perovskite oxides have a cubic crystal structure, with the larger A‐site cations occupying the corners of the cube and the smaller B‐site cations located at the center of the cube and octahedrally coordinated by the face‐centered oxygen atoms .…”

Ferroelectric‐Enhanced Polysulfide Trapping for Lithium–Sulfur Battery Improvement

“…The phases and structures of the BTO nanoparticles were examined by X‐ray diffraction (XRD), which shows that these BTO nanoparticles are highly crystallized in a tetragonal phase (Figure g). Notice that the spontaneous polarization of BTO is originated from the asymmetric crystal structure, which can induce non‐overlapping charges in unit cell center of an individual dielectric crystal so as to form the electric dipole moment (Figure i, left) . In order to quantify the polar of the as‐synthesized BTO nanoparticles, a Rietveld method of XRD data refinement and analysis was employed to obtain detailed structural information (Table S1, Supporting Information).…”

“Self‐Peel‐Off” Transfer Produces Ultrathin Polyvinylidene‐Fluoride‐Based Flexible Nanodevices

“…The sandwich structure can be regarded as a doublesided flexible device that takes full advantage of the ferroelectricity of PVDF. [42] The polarization of the PVDF film mainly results from the enriched chemical groups (e.g, carbonyl and hydroxyl groups) on the rGO film. These chemical groups interact with the fluorine groups in the PVDF chain.…”