Temperature dependent local structure coherence of surface-modified BaTiO₃ nanocubes

Abstract

Surface functionalized barium titanate (BaTiO3) nanocrystals have been explored for highly tunable chemical and electronic properties, potentially of use in ceramic-polymer composites for flexible ferroelectric device applications, directed synthesis of...

The Effect of Chemical Environment and Temperature on the Domain Structure of Free‐Standing BaTiO3 via In Situ STEM

“…[ 55 ] Notably, a variety of single crystal BTO nanoparticles have also been reported to show diffuse phase transition. [ 56–58 ] In our case, the sample is a relatively thick free‐standing film and the T C would be expected to be closer to that of the bulk, as reported for capacitor structures using similar single crystal BTO lamellae. [ 59,60 ] A possible origin for the difference here observed could be the presence of oxygen vacancies (𝑉 o ).…”

High-k BaTiO3 nanoparticle films as gate dielectrics for flexible field effect transistors

“…Recent studies performed by our group using synchrotron X-ray diffraction and total scattering and Pair Distribution Function (PDF) techniques revealed that BaTiO 3 nanocubes of different sizes possess an orthorhombic/ tetragonal structure. 35,36 As seen in Fig. 3, the presence of oleic acid molecules at the surface of BTO nanocubes was confirmed experimentally by the absorption bands at 1560 cm À1 in the Fourier-transform infrared (FTIR) spectra of the oleic acid capped BTO NCs, bands ascribed to the stretching modes of the carboxyl (CQO) moiety.…”

Size and orientation of polar nanoregions characterized by PDF analysis and using a statistical model in a Bi(Mg1/2Ti1/2)O3–PbTiO3 ferroelectric re-entrant relaxor

“…However, the limited number of electrons on the B-site cations (Z(Ti 4+ ) = 18, Z(Mg 2+ ) = 10) in combination with the weak scattering of oxygen (Z(O 2− ) = 10) make this unlikely to be solely from B to O. [45][46][47] The peak maxima at ∼2.2 Å in the XPDF is more likely to originate from the contributions of the A-O peaks, given the stronger scattering from the A-site cations (Z(Pb 2+ ) = 80, Z(Bi 3+ ) = 80). This can also be seen in the NPDF (Fig.…”