Piezoresponse properties of orderly assemblies of BaTiO3 and SrTiO3 nanocube single crystals

Mimura, Ken-ichi; Kato, Kazumi; Imai, Hiroaki; Wada, Satoshi; Haneda, Hajime; Kuwabara, Makoto

doi:10.1063/1.4731198

Cited by 70 publications

(64 citation statements)

References 19 publications

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“…gel method25 , and also higher than those of BT/ST nanocomposite (59 pm V -1 )45 constructed from BT and ST nanocubes by solution self-assembly and the BT-900 mesocrystal (103 pm V -1 ) prepared in this study. This is due to the perfect orientation matching between the BT and ST nanocrystals in the mesocrystalline BT/ST nanocomposite prepared in this study.…”

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confidence: 90%

Ferroelectric Mesocrystalline BaTiO₃/SrTiO₃ Nanocomposites with Enhanced Dielectric and Piezoelectric Responses

Tanaka

et al. 2015

Chem. Mater.

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A platelike mesocrystalline BaTiO 3 /SrTiO 3 (BT/ST) nanocomposite is prepared via a clever two-step solvothermal soft chemical process. Firstly a protonated titanate H 1.07 Ti 1.73 O 4 ·nH 2 O (HT) crystal with a layered structure and platelike morphology is solvothermally treated in a Ba(OH) 2 solution to generate a homogeneous platelike BaTiO 3 /HT (BT/HT) nanocomposite. Secondly the generated BT/HT nanocomposite is solvothermally treated in a Sr(OH) 2 solution to generate the mesocrystalline BT/ST nanocomposite with platelike particle morphology. The transformation reactions from HT precursor to the mesocrystalline BT/ST nanocomposite are topochemical conversion reactions, and the formed BT/ST nanocomposite is constructed from wellaligned BT and ST nanocrystals in the same crystal-axis orientation. The BT/ST nanocomposite annealed at 900 o C shows a ferroelectric behavior and drastically enhanced piezoelectric and dielectric responses owing to the introduction of a lattice strain at a three dimensional heteroepitaxial interface between the BT and ST nanocrystals in the mesocrystal. The nanostructure of the BT/ST mesocrystal is suitable for simultaneous application of the strain engineering and the orientation engineering to develop high performance piezoelectric and dielectric materials. ■ INTRODUCTIONThe study on ferroelectric metal oxide perovskites with an ABO 3 formula is of great scientific and technological interest for their outstanding ferroelectric, piezoelectric, dielectric, pyroelectric, photoelectric, and catalytic responses. 1 , 2 , 3 The lattice strain engineering is one of the efficient approaches to further improve the electrical performances of the metal oxide perovskites. 4 The solid solution near a morphotropic phase boundary (MPB) separating two crystal symmetries with different orientations of spontaneous polarization can usually exhibit an anomalously high piezoelectric and dielectric responses. 5 , 6, 7 The enhancements of the piezoelectric and dielectric responses are associated with a lattice strain derived from the lattice mismatch between the two morphotropic phases with slightly different lattice constants at their interface. 5,7 , 8, 9 The lattice strain induces an unstable spontaneous polarization at the interface, and then its polarization rotation becomes sensitive when a bias is applied, namely the energy for the polarization rotation becomes very low at MPB. 4,6,10,11 The PbZr x Ti 1-x O 3 (PZT) is a successful example of application of the MPB, which is widely used in the piezoelectric devices. Since PZT materials contain high content of toxic Pb, recently the studies on searching its alternative materials have become a hot topic. Some applications of the MPB to improve piezoelectric performances of Pb-free ferroelectric materials have been reported. However, the composition range of the MPB is very narrow, and also it is hard to get a temperature-independent MPB, 12 which limited the applications of the MPB.An artificial superlattice constructed from two kinds of perovs...

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confidence: 90%

Ferroelectric Mesocrystalline BaTiO₃/SrTiO₃ Nanocomposites with Enhanced Dielectric and Piezoelectric Responses

Tanaka

et al. 2015

Chem. Mater.

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“…The experimental assembly of BaTiO 3 nanocubes was achieved independently by dip‐coating method and by solvent evaporation . In both cases, the outcome of self‐assembly was a highly ordered mesocrystal structure with simple cubic lattice and long range‐ordering (cf.…”

Section: Resultsmentioning

confidence: 99%

“…Using the oriented anisometric nanoparticles for thin‐film preparation is expected to bring several advantages because they promote crystallization and enhance the orientation of the thin films. In addition, piezoelectric and ferroelectric measurements of the ordered BaTiO 3 —SrTiO 3 nanocubes' assembly revealed that interfacial lattice distortions between the nanocrystallites significantly affect the dielectric and piezoelectric responses . This suggested that the piezoelectric properties could be tuned by the interface‐controlled structures consisting of cubic‐shaped dielectric building blocks.…”

Section: Introductionmentioning

confidence: 99%

Role of Intrinsic Dipoles in the Evaporation‐Driven Assembly of Perovskite Nanocubes into Energy‐Harvesting Composites

Zablotsky

Kuzovkov

Kotomin

2019

Physica Status Solidi (a)

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Efficient ambient energy scavenging exploiting piezoelectric properties of ferroelectric perovskites is an attractive green strategy to power low‐energy devices. In turn, the colloidal processing of the nearly monodisperse and highly crystalline single‐domain nanocubes of BaTiO3 is a promising route to produce oriented, high‐performance thin films for integration into nanostructured‐ferroelectric devices. Controlling the local behavior of nanocrystals is imperative for fabricating highly ordered assemblies, whereas the current picture of nanoscale polarization suggests a potential presence of significant electrodipolar interaction in ferroelectric nanoparticles. However, its role in the condensation of perovskite nanocubes remains unknown. The results of simulated self‐assembly and characterization of osmotically densified ensembles of dipolar nanocubes are reported. It is shown that in fact for solubilized BaTiO3 nanocubes, the polarization screening must be complete without appreciable dipole moment (below a few kBT), whereas stray interactions from incompletely screened surface charges are likely the major sources of disorder in self‐assembled architectures of SrTiO3.

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“…The piezoresponse of the BaTiO3 and SrTiO3 mixture showed a nonlinear curve and stepwise behavior at a high poling field, which differed from ferroelectric BaTiO3 or paraelectric SrTiO3 nanocubes [128].…”

Section: Article In Pressmentioning

confidence: 99%

Mesostructured crystals: Growth processes and features

Imai

2016

Progress in Crystal Growth and Characterization of Materials

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Piezoresponse properties of orderly assemblies of BaTiO3 and SrTiO3 nanocube single crystals

Cited by 70 publications

References 19 publications

Ferroelectric Mesocrystalline BaTiO₃/SrTiO₃ Nanocomposites with Enhanced Dielectric and Piezoelectric Responses

Ferroelectric Mesocrystalline BaTiO₃/SrTiO₃ Nanocomposites with Enhanced Dielectric and Piezoelectric Responses

Role of Intrinsic Dipoles in the Evaporation‐Driven Assembly of Perovskite Nanocubes into Energy‐Harvesting Composites

Mesostructured crystals: Growth processes and features

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Piezoresponse properties of orderly assemblies of BaTiO3 and SrTiO3 nanocube single crystals

Cited by 70 publications

References 19 publications

Ferroelectric Mesocrystalline BaTiO3/SrTiO3 Nanocomposites with Enhanced Dielectric and Piezoelectric Responses

Ferroelectric Mesocrystalline BaTiO3/SrTiO3 Nanocomposites with Enhanced Dielectric and Piezoelectric Responses

Role of Intrinsic Dipoles in the Evaporation‐Driven Assembly of Perovskite Nanocubes into Energy‐Harvesting Composites

Mesostructured crystals: Growth processes and features

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Ferroelectric Mesocrystalline BaTiO₃/SrTiO₃ Nanocomposites with Enhanced Dielectric and Piezoelectric Responses

Ferroelectric Mesocrystalline BaTiO₃/SrTiO₃ Nanocomposites with Enhanced Dielectric and Piezoelectric Responses