Perovskite BaTiO3 thin films have a wide range of applications for advanced devices. Especially, epitaxial BaTiO3 thin films are highly desirable for these advanced applications. So far, such epitaxial BaTiO3 films have been successfully fabricated on different single-crystal substrates using various deposition techniques including RF magnetron sputtering, molecular beam epitaxy, metallorganic ...

nano-sized batio3 powders with particular nb concentrations were prepared by rotary- hydrothermal (rh) method. hydrothermal method was used at 180 °c for 5 hours with new ti pressure and the teflon vessel was rotated at a speed of 160 rpm during the hydrothermal reaction. new hydrothermal method was used instead of previous solid state reaction for the system batio3±nb2o3 in high temperature to...

We present and discuss the results of calculations of surface relaxations and rumplings for the 001 and 011 surfaces of BaTiO3 and PbTiO3 using a hybrid B3PW description of exchange and correlation. On the 001 surfaces, we consider both AO A=Ba or Pb and TiO2 terminations. In the former case, the surface AO layer is found to relax inward for both materials, while outward relaxations of all atom...

We develop second-harmonic nanoparticles as the contrast agents for cell imaging. Second-harmonic nanoparticles show promise as cell imaging probes due to their non-bleaching, non-blinking, and coherent signal. Nanoparticles of noncentrosymmetric crystal structures have high second-harmonic generation (SHG) efficiency and provide high contrast in a generally non-structured cell environment. Her...

The various approximations used in the construction of a first-principles effective Hamiltonian for BaTiO3, and their effects on the calculated transition temperatures, are discussed. An effective Hamiltonian for BaTiO3 is constructed not from first-principles calculations, but from the structural energetics of an atomistic shell model for BaTiO3 of Tinte et al. This allows the elimination of c...

The cubic oxyhydride perovskite BaTiO3−xHx, where the well-known ferroelectric oxide BaTiO3 is partially hydridized, exhibits a variety of functions such as being catalyst and precursor for synthesis mixed-anion compounds by utilizing labile nature hydride anions. In this study, we present hexagonal version, BaTi(O3−xHx) (x < 0.6) with 6H-type structure, synthesized topochemical reaction usi...

Ink formulation is one of the main challenges with ceramic 3D printing. Here, we present a new, reactive-colloidal hybrid ink for printing by robocasting BaTiO3-based ceramics. The combines titanium isopropoxide-based sol-gel base colloidal dispersion powder, here demonstrated BaTiO3 both as (by reaction isopropoxide and barium oxide) addition powder) parts. Addition glycerol was necessary to a...

There is a growing need for high energy density capacitors in modern electric power supplies. The creation of nanocomposite systems based on one-dimensional nanofibers has shown great potential in achieving a high energy density since they can optimize the energy density by exploiting both the high permittivity of ceramic fillers and the high breakdown strength of the polymer matrix. In this pa...

Recently, ferroelectric tunnel junctions have attracted much attention due to their potential applications in non-destructive readout non-volatile memories. Using a semiconductor electrode has been proven effective to enhance the tunnelling electroresistance in ferroelectric tunnel junctions. Here we report a systematic investigation on electroresistance of Pt/BaTiO3/Nb:SrTiO3 metal/ferroelectr...

Dielectric elastomers (DEs) are being exploited for biological applications such as artificial blood pumps, biomimetic grippers and biomimetic robots. Generally, polyacrylate and silicone rubber (SR) are the most widely used materials for fabricating DEs in terms of mixing with other polymers or compounding them with highly dielectric particles. Furthermore, pre-stretch offers an effective appr...