In situ growth BaTiO3 nanocubes and their superlattice from an aqueous process

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

doi:10.1039/c2nr11594h

Cited by 108 publications

(129 citation statements)

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“…By dynamic light scattering (DLS) measurements of ST and BT nanocubes in toluene, the average size of ST and BT nanocubes was determined to be 20 nm and BT nanocubes showed a narrow size distribution corresponding to be almost mono-dispersed in toluene. 14,15 On the other hand, ST nanocubes had rather wide band in the range of 50-70 nm in the DLS profile. 14 This result indicated that ST nanocubes were slightly aggregated in toluene.…”

mentioning

confidence: 99%

“…14,15 The microstructure of these dielectric nanocubes have been observed by a high resolution transmission electron microscope (HR-TEM). The high magnification profiles indicated that each had a cubic shape with sharp edges and clear lattice fringes without inner voids.…”

mentioning

confidence: 99%

“…Recently, BT and ST nanocube single crystals which grew with {100} crystalline faces were synthesized by using hydrothermal process. [12][13][14][15] The orderly assembled structure of these nanocubes has a large potential to introduce innumerable identical BT/ST hetero-interfaces. Additionally, by the solution bottom-up process using a capillary force at the evaporation of dispersion media, monolayers of the nanocubes were settled on Pt electrodes.…”

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confidence: 99%

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

Mimura

Kato

Imai

et al. 2012

Applied Physics Letters

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Orderly assemblies of BaTiO3 (BT) nanocubes, SrTiO3 (ST) nanocubes and BT-ST mixture nanocubes were fabricated on Pt-coated Si substrate directly by solution self-assembly and heated at 850 °C. The dielectric nanocubes aligned face to face in a quite wide region of several tens of square-micrometers with a height of one micrometer, and even inside of the structures was ordered. The piezoresponse of BT-ST mixture assembly showed non-linear curve and stepwise behavior at high poling field, which differed from ferroelectric BT and paraelectric ST nanocube assemblies.

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confidence: 99%

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confidence: 99%

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

Mimura

Kato

Imai

et al. 2012

Applied Physics Letters

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“…A typical synthesis process was similar to the previous report 7),22), 23) and summarized in Fig. 1.…”

Section: Methodsmentioning

confidence: 86%

“…4)7) Especially, the authors have already synthesized BT NCs by hydrothermal method with aqueous compounds and organic surfactants. 7) Highly qualified BT NCs with 15 nm in a size were obtained by this method. Moreover, the authors also fabricated three-dimensional (3D) BT NC packing structures by using capillary-force-assisted selfassembly method.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of barium titanate-based solid solution nanocubes

Mimura

Kato

2016

J. Ceram. Soc. Japan

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Ba(Zr x ,Ti 1¹x )O 3 nanocubes (BZT x NCs) were synthesized by hydrothermal reaction with titanium and zirconium aqueous compounds and surfactants. The nanocubes were assembled on the substrates by dropping-drying method. The microstructures of the nanocube were evaluated by field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). The ordered assemblies of the NCs were yielded on the substrate when Zr contents were below 0.2. BZT 0.2 NCs had narrow size distribution about 20 nm observed by FE-SEM and TEM. On the other hand, BZT 0.5 and BaZrO 3 NCs were attached each other and they formed large cube above 100 nm. Perovskite phase was confirmed in all BZT x NCs by X-ray diffraction. Lattice constant of BZT x NCs increased linearly with increasing Zr contents. The composition of BZT 0.2 NCs were calculated by X-ray photoelectron spectroscopy. These results suggest that the ratio of Ba:Zr:Ti is nearly equal to the nominal ratio. Crystallographic phase of BaTiO 3 and BZT 0.2 NCs was characterized by Raman spectroscopy under various measurement temperatures.

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Layer‐by‐Layer Controlled Perovskite Nanocomposite Thin Films for Piezoelectric Nanogenerators

Kim

Lee

Hwang

et al. 2014

Adv Funct Materials

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wileyonlinelibrary.comenergy, [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] as well as to other technical applications, such as batteries, sensors, magnetoelectric devices. [19][20][21] Recently, the successful preparation of piezoelectric nanogenerators (NGs), which can harvest mechanical energy from our surrounding living environments, was demonstrated using piezoelectric PFO materials such as BaTiO 3 (BTO), [2][3][4][5] ZnSnO 3 , [6][7][8] (K, Na) NbO 3 , [ 9,10 ] PMN-PT, [ 11,12 ] and Pb(Zr,Ti) O 3 (PZT). [13][14][15][16][17] The results offer significant potential for various technological applications, such as remote/wireless data transmission, battery charging, and the powering of electronic devices.BTO has been regarded as one of the most technologically promising PFO materials for use in piezoelectric NGs because of its strong piezoelectric properties and the environmental advantages that it offers over lead-based PFO ceramics such as PZT. However, little experimental consensus exists on the critical size at which the size-dependent ferroelectricity of the BTO nanoparticles (BTO NPs ) is suppressed, whereby the critical size of the BTO NPs is generally recognized to be approximately 10-20 nm. [ 22 ] Most studies of BTO-based devices have focused on the use of large BTO NPs (>100 nm), [ 4 ] BTO nanotubes (approximately 5 µm in length or longer) [ 23 ] or vacuumdeposited BTO layers with high-temperature annealing. [ 3 ] Further, although a nanocomposite thin fi lm has been regarded as a very attractive structure for large-scale fl exible piezoelectric NGs due to its facile size scalability, cost-effectiveness, and mechanical robustness, [ 8 ] a high degree of control over the fi lm/ layer dimensions and a uniform internal structure without the requirement of binders or additives to prevent NP segregation or agglomeration are still very challenging for the realization of high-performance nanocomposite thin fi lm-based piezoelectric NGs.With respect to the fabrication of nanocomposite fi lms, the layer-by-layer (LbL) assembly method has demonstrated the highest potential and versatility for the preparation of nanocomposite fi lms with tailored thicknesses, compositions, and functionalities achieved through complementary interactions. [24][25][26][27][28][29][30][31][32][33][34] LbL assemblies can also be effectively applied to various substrates, irrespective of their size or shape. However, the traditional LbL assembly of electrostatically charged inorganic NPs in aqueous solvents relies on electrostatic properties of NP surface, hence the direct application of this approach for Perovskite nanoparticle-based nanocomposite thin fi lms strictly tailored using unconventional layer-by-layer (LbL) assembly in organic media for piezoelectric nanogenerators (NGs) are demonstrated. By employing sub-20-nm BaTiO 3 nanoparticles stabilized by oleic acid ligands (i.e., OA-BTO NPs ) and carboxylic acid (COOH)-functionalized polymers, such as poly(acrylic acid) (PAA), the resulting OA-BTO NP /PAA nanoco...

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In situ growth BaTiO3 nanocubes and their superlattice from an aqueous process

Cited by 108 publications

References 28 publications

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

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

Synthesis and characterization of barium titanate-based solid solution nanocubes

Layer‐by‐Layer Controlled Perovskite Nanocomposite Thin Films for Piezoelectric Nanogenerators

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