Article
Chemistry, Multidisciplinary
C. Ji, T. Fan, G. Chen, X. Bai, J. Wang, J. He, W. Cai, R. Gao, X. Deng, Z. Wang, X. Lei, C. Fu
Summary: The study showed that microwave sintering method can effectively decrease the grain size and enhance the compactness of BFO-BTO ceramics, while the introduction of BTO can strengthen its dielectric relaxation behavior.
MATERIALS TODAY CHEMISTRY
(2021)
Article
Materials Science, Multidisciplinary
Hwang-Pill Kim, Haotian Wan, Ho-Yong Lee, Yohachi Yamashita, Wook Jo, Xiaoning Jiang
Summary: To investigate the influence of poling conditions on thermal stabilities, we studied the direct current (DC) and alternating current (AC) poled relaxor-PbTiO3 single crystals grown by solid-state crystal growth. Our experiments showed that the AC-poling enhanced the thermal stabilities of these single crystals, with a dielectric permittivity of 4970 after annealing at 99.6°C, compared to 3560 in the DC-poling case. The dissimilar thermal stabilities can be attributed to different domain configurations.
MATERIALS RESEARCH LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Shanrong Lv, Zhili Qiu, Dehong Yu, Xiunan Wu, Xiang Yan, Yiping Ren, Yuqi Huang, Guan Jiang, Fenglei Gao
Summary: Piezoelectric material-mediated sonodynamic therapy (SDT) has been extensively studied for cancer treatment. In this study, a PEGylated piezoelectric solid solution 0.7BiFeO(3)-0.3BaTiO(3) nanoparticles (P-BF-BT NPs) with tuned band structure were synthesized. The P-BF-BT NPs showed excellent piezoelectric properties and the ability to generate superoxide radicals and oxygen by water splitting, as well as initiating the Fenton reaction to produce hydroxyl radicals for chemodynamic therapy (CDT) under ultrasound. The results of in vitro and in vivo experiments demonstrated the promising effects of multimodal imaging-guided P-BF-BT NP-mediated synergistic SDT/CDT for hypoxic tumor elimination with high therapeutic biosafety.
Article
Chemistry, Physical
Yongbao Cui, Chunchun Li, Xiuyun Lei, Fengrong Li, Haochen Sun, Zhaojie Wang, Suning Wang, Biaolin Peng, Dawei Wang, Feng Yan, Tianxiang Yan, Laijun Liu
Summary: In this paper, an effective strategy to overcome the trade-off between piezoelectric coefficient and the Curie temperature is proposed by co-doping K+ and Nb5+ ions at A/B sites, achieving a combination of high TC and d33 in BiFeO3-BaTiO3-based ceramics. The MPB region is confirmed in a narrow range of x = 0.0075-0.01 by the Rietveld refinement of XRD patterns and Raman spectroscopy deconvolution. An optimized composition with 1 mol% K/Nb co-dopants possesses a high Curie temperature (TC = 604 degrees C) along with d33 = 163 pC/N, kp = 43 %, Pr = 57.94 mu C/cm2, and Ps = 68.18 mu C/cm2. An outstanding thermal stability to 540 degrees C is verified via the temperature dependence of d33 and in situ Raman spectroscopy. This work not only provides a potential lead-free candidate material for high-temperature piezoelectric applications, but also offers a feasible strategy to design high-temperature dielectrics by exploiting site engineering.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Multidisciplinary
S. J. T. Vasconcelos, M. A. S. Silva, R. G. M. de Oliveira, M. H. Bezerra Junior, H. D. de Andrade, I. S. Queiroz Junior, C. Singh, A. S. B. Sombra
Summary: This study synthesized (LaFeO3)((1-m))(CaTiO3)(m) (m = 0, 0.1, 0.3 and 0.5) solid solutions by conventional solid-state reaction, and investigated the electric properties using impedance spectroscopy, revealing the trends of electrical properties with composition and frequency.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Chemistry, Multidisciplinary
Mingfang Shu, Bingbing Yang, Miao Liu, Shunjin Zhu, Sumei Li, Chengbing Pan, Jiamingzhu Wang, Lihua Yin, Jie Yang, Xuebin Zhu, Yuping Sun
Summary: The study demonstrates the successful fabrication of lead-free piezoelectric thin films based on BiFeO3 using a solid solution method, achieving a significant increase in effective piezoelectric coefficient to over 500 pm/V.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Chemistry, Multidisciplinary
Chao Zhang, Xiaolin Liu, Jing Chen, Jia Lin
Summary: Halide perovskite, a type of perovskite material with superior semiconducting properties, has attracted significant attention for its potential in solar cell applications. The growth of bulk halide perovskite single crystals is crucial for understanding their intrinsic properties. The growth method plays a significant role in determining the quality and size of the target PSCs.
CHINESE JOURNAL OF CHEMISTRY
(2021)
Article
Chemistry, Physical
Hua Jiao, XueRui Zhou, Jiechen Jin, Kang Zhao, Yufei Tang, Xinyuan Zhang, Sen Song
Summary: In this study, raspberry-like BaTiO3 nanoparticles were successfully synthesized and characterized. The effects of BaTiO3 on the antibacterial properties of Escherichia coli were investigated before and after polarization. The formation mechanism of the raspberry-like structure was revealed through Gaussian calculations, and the surface charge of BaTiO3 was simulated using COMSOL Multiphysics. ESR spectroscopy confirmed the production of reactive oxygen species.
CHEMICAL PHYSICS LETTERS
(2022)
Article
Nanoscience & Nanotechnology
M. Jurjans, L. Bikse, E. Birks, S. Svirskas, M. Antonova, M. Kundzins, A. Sternberg
Summary: This study investigates the structural, electromechanical, and dielectric properties of (1 - x)(0.8Na(0.5)Bi(0.5)TiO(3)-0.2BaTiO(3))-xCaTiO(3) [(1 - x) (0.8NBT-0.2BT)-xCT] ceramics as potential room temperature actuators with high field-induced strain. The choice of 0.8NBT-0.2BT as a starting composition allows for a high tetragonality even far from the morphotropic phase boundary. The addition of CaTiO3 as a third component decreases the depolarization temperature and enables a high field-induced strain at room temperature. The measured strains at the field-induced phase transition are lower than expected, suggesting an incomplete transition from the ferroelectric phase to the nonpolar phase. Among the manufactured samples, a composition with x = 0.100 shows a phase transition close to room temperature and achieves unipolar strains up to 0.23% at E = 65 kV/cm. Electrostrictive-like strain is observed not only above the depolarization temperature but also in the field-induced phase transition region.
Article
Materials Science, Ceramics
F. Brahma, Bhagyashree Mohanty, S. Bhattacharjee, R. L. Hota, R. K. Parida, B. N. Parida
Summary: The solid solution of (Sm0.75Bi0.25FeO3)(0.5) (BaTiO3)(0.5) perovskite system, prepared through conventional solid state reaction, exhibits multiferroic properties and high dielectric constant, making it suitable for various storage devices.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Xiaojun Wu, Wei Shi, Shangyi Guan, Shuhao Wang, Yuan Cheng, Lixu Xie, Hao Chen, Zhi Tan, Yugen Xu, Qiang Chen
Summary: A series of CNCBT-NBT ferroelectric ceramics were prepared, with the introduction of (Na0.5Bi0.5)(2+) to improve their piezoelectric and ferroelectric properties, as well as enhance the temperature stability of piezoelectric activity. While TC shows a decreasing trend with increasing doping concentration, some samples still maintain high T-C values.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Jun-Di Ai, Cheng-Chao Jin, Dai-Ming Liu, Jin-Tao Zhang, Ling-Xia Zhang
Summary: Piezoelectric materials are sensitive to lattice strain, and it is significant to improve piezocatalytic performance by strain engineering and understand its mechanism. In this study, BaTiO3 (BTO) powder was fabricated and lattice strain was induced in BTO through ball-milling. The strain-engineered BTO showed enhanced piezocatalytic performance due to improved piezoelectricity, piezoelectric polarization, and adsorption activities. This work not only provides a simple and general method to improve piezocatalytic performance, but also reveals the enhancement mechanism.
Article
Chemistry, Multidisciplinary
Jing-Wei Chen, Arnab Pal, Bo-Hao Chen, Gautam Kumar, Subhodeep Chatterjee, Kiran Peringeth, Zong-Hong Lin, Michael H. H. Huang
Summary: This study successfully synthesizes various forms of BaTiO3, including octahedra, edge- and corner-truncated cubes, and cubes with four tunable sizes. Acetic acid treatment removes BaCO3 impurities, and Rietveld refinement confirms the crystal structure is tetragonal. The crystals' physical properties vary with their size and facet. BaTiO3 octahedra exhibit better performance than truncated cubes and cubes, especially in piezoelectric nanogenerators.
Article
Engineering, Electrical & Electronic
Lagen Kumar Pradhan, Suman Kumari, Murli Kumar Manglam, Rabichandra Pandey, Manoranjan Kar
Summary: This study investigates the evolution of microstructure and its effect on the electrical properties of ((Bi0.5Na0.5)(0.94)Ba-0.06)(0.70)Sr0.30TiO3 [BNBSTO] electroceramic. The relative dielectric constant and temperature-dependent relative permittivity both increase with the sintering temperature, while the electrical diffuseness decreases with the increase of grain size. Grain boundaries play a significant role in the electrical conductivity, and the grain size directly influences the ferroelectric properties and energy storage density.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Chemistry, Applied
Sota Shigehara, Ryo Ohmura
Summary: CO2 hydrate is suitable for solid carbonated foods and the crystal morphology, including polyhedral, skeletal, and dendritic crystals, can affect the texture of foods. Observational study in aqueous fructose solution shows that crystal growth of CO2 hydrate initially forms at the gas-liquid interface and then in the liquid phase, potentially impacting the texture of foods.
Article
Chemistry, Multidisciplinary
Yang Zhang, Hui Wang, Koki Tachiyama, Tsukasa Katayama, Yinghao Zhu, Si Wu, Hai-Feng Li, Jinghong Fang, Qin Li, Yun Shi, Ling Wang, Zhengqian Fu, Fangfang Xu, Jianding Yu, Shintaro Yasui, Mitsuru Itoh
Summary: In this study, epsilon-Fe2O3 single crystals were successfully synthesized by codoping with Ga3+ and Sc3+, demonstrating both room-temperature ferrimagnetism and spontaneous ferroelectric polarization. The single crystals displayed strong magnetic anisotropy along the a-axis at 300 K, with magnetic transition temperature and coercive field decreasing with increasing x. Furthermore, a magnetic-field-induced modulation of polarization was observed at a relatively high temperature of 150 K with a magnetoelectric coefficient of (2-5) x 10(-11) S/m.
CRYSTAL GROWTH & DESIGN
(2021)
Article
Physics, Applied
Sou Yasuhara, Shintaro Yasui, Takashi Teranishi, Takuya Hoshina, Takaaki Tsurumi, Mitsuru Itoh
Summary: Introducing a surface-supporting material on the cathode and reinforcing the electric field concentration at the triple-phase interface can accelerate Li-ion motions and improve the high-speed rechargeability of next-generation secondary batteries. The effects of the triple-phase interface on anode materials remain to be fully understood, but depositing low relative permittivity materials on epitaxial thin films can promote high C-rate performance.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2021)
Article
Physics, Applied
Y. Kawahira, R. Harada, S. Maruyama, T. Koganezawa, S. Yasui, M. Itoh, Y. Matsumoto
Summary: Controlling nanostructures and crystallographic orientations in epitaxial nanocomposite thin films is crucial for tuning their physical properties. An epitaxial nanocomposite thin film of (110) oriented CoFe2O4 and (1110) oriented Bi5Ti3FeO15 grown on SrTiO3 (110) substrates with a vertically aligned pillar-matrix type structure was presented. The ferroelectric properties analysis suggests that BTFO15-CFO nanocomposite thin films have a switchable out-of-plane polarization component, but a high CFO pillar density may hinder polarization reversal due to the formation of conductive paths at the pillar-matrix interface.
JOURNAL OF APPLIED PHYSICS
(2021)
Review
Chemistry, Inorganic & Nuclear
Mitsuru Itoh, Yosuke Hamasaki, Hiroshi Takashima, Rie Yokoi, Ayako Taguchi, Hiroki Moriwake
Summary: Since the discovery of BaTiO3 in 1943, perovskite-type materials have been crucial in the research and application of ferroelectric materials. By studying factors such as ionic and covalent bonding, we have gained insights into the evolution of ferroelectricity and made progress in designing new ferroelectric materials.
DALTON TRANSACTIONS
(2022)
Review
Physics, Multidisciplinary
Shinya Koshihara, Tadahiko Ishikawa, Yoichi Okimoto, Ken Onda, Ryo Fukaya, Masaki Hada, Yasuhiko Hayashi, Sumio Ishihara, Tadeusz Luty
Summary: This work reviews experimental studies on photo-induced cooperative phenomena related to ultrafast structural and electronic-state dynamics. The growth of PIPT research is facilitated by collaboration between quantum beam science and materials science, and the concept has expanded with developments in ultrafast quantum beam technology.
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Xia Cai, Yiming Zhang, Zejiao Shi, Ying Chen, Yujie Xia, Anran Yu, Yuanfeng Xu, Fengxian Xie, Hezhu Shao, Heyuan Zhu, Desheng Fu, Yiqiang Zhan, Hao Zhang
Summary: The authors propose a multi-step and multi-stage screening scheme to accelerate the discovery of hybrid organic-inorganic perovskites, combining machine learning with high-throughput calculations for pursuing excellent efficiency and thermal stability in solar cells. Through this screening process, they successfully identified four experimental-feasible candidates with good stability and high efficiency, which were further verified by density-functional theory calculations.
Article
Instruments & Instrumentation
Kou Takubo, Samiran Banu, Sichen Jin, Misaki Kaneko, Wataru Yajima, Makoto Kuwahara, Yasuhiko Hayashi, Tadahiko Ishikawa, Yoichi Okimoto, Masaki Hada, Shinya Koshihara
Summary: To investigate photoinduced phenomena, ultrashort pulsed x-ray and electron sources are necessary. Research has developed a tabletop setup for ultrashort pulsed electron diffraction that can observe photoinduced structural dynamics on a femtosecond timescale. The setup has a pulse duration comparable to femtosecond laser pulse widths and could be a powerful tool in material science.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Article
Materials Science, Multidisciplinary
Zuojian Jiang, Jiayan Huang, Renchen Yuan, Ning'an Xu, Ying Jiang, Jiye Zhang, Faqiang Zhang, Juanjuan Xing, Hui Gu, Desheng Fu
Summary: The coexistence of orthorhombic and tetragonal phases in Ba(Ti1-xSnx)O-3 ceramics enhances their piezoelectric response by facilitating the rotation of ferroelectric domains. Changes in the phase structure result in significant redshifts of defect peaks, which can be detected through cathodoluminescence (CL) analysis.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Payel Aich, Shreya Das, Shuvajit Halder, Carlo Meneghini, Desheng Fu, Vasudeva Siruguri, Som Datta Kaushik, Mitsuru Itoh, Tanusri Saha-Dasgupta, Sugata Ray
Summary: We propose a novel approach to achieve multiferroicity in a single phase by engineering the anionic network and creating local geometric distortions in fluorinated, vacancy-ordered brownmillerite Ca2Mn2O5-xFy. The system exhibits both ferroelectricity and an antiferromagnetic order above room temperature, pointing toward a new route to multiferroicity through anion mixing.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Hongwu Yu, Yoichi Okimoto, Atsuya Morita, Shuhei Shimanuki, Kou Takubo, Tadahiko Ishikawa, Shin-ya Koshihara, Ryusei Minakami, Hirotake Itoh, Shinichiro Iwai, Naoshi Ikeda, Takumi Sakagami, Mayu Nozaki, Tatsuo Fujii
Summary: An epitaxial film of YbFe2O4 was fabricated on YSZ substrate by magnetron sputtering technique, and second harmonic generation and terahertz radiation signal were observed. The polarization structure and the relationship between the YbFe2O4 film structure and the crystal axes of the YSZ substrate were revealed through analyses of the SHG profiles. The anisotropic polarization dependence of the observed terahertz pulse suggested that YbFe2O4 can be used as a terahertz wave generator.
Article
Physics, Applied
Sou Yasuhara, Shintaro Yasui, Takuya Hoshina, Mitsuru Itoh, Takaaki Tsurumi
Summary: Epitaxial thin films have unique properties due to epitaxial strain, but the presence of defects disrupts these effects. High-temperature annealing can improve film quality, but weakens bottom electrode materials. This study focused on Nb-doped CaMnO3 as a bottom electrode to evaluate BaTiO3 ferroelectricity, demonstrating the ability to withstand high temperatures and enhance ferroelectric properties.
APPLIED PHYSICS LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Samiran Banu, Mone Kato, Kou Takubo, Yoichi Okimoto, Shinya Koshihara, Kaoru Iwano, Wataru Kosaka, Hitoshi Miyasaka, Tadahiko Ishikawa
Summary: This study reports on a type of electron donor-acceptor metal-organic framework that exhibits rapid charge transfer and lattice structure changes under photoexcitation. A new electronic state, known as a photoinduced hidden state, appears upon photoexcitation.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Rafikul Ali Saha, Jhuma Sannigrahi, Ilaria Carlomagno, S. D. Kaushik, Carlo Meneghini, Mitsuru Itoh, Vasudeva Siruguri, Sugata Ray
Article
Materials Science, Multidisciplinary
Shojiro Kimura, Hiroaki Onishi, Akira Okutani, Mitsuru Akaki, Yasuo Narumi, Masayuki Hagiwara, Kouichi Okunishi, Koichi Kindo, Zhangzhen He, Tomoyasu Taniyama, Mitsuru Itoh
Summary: In this study, the selection rules of optical transitions in BaCo2V2O8 were clarified using high-field electron spin resonance measurement. It was found that unconventional magnetic excitation can couple with both magnetic and electric fields in the field-induced quantum critical state. This coupling mechanism is attributed to the periodic spin interactions and magnetoelectric coupling in BaCo2V2O8.
