Crystals
·
2020
·Vol. 10
·期 9
·733
·
IF 2.404
Qixiang Wang,Hong Fang,Di Wang,Jie Wang,Nana Zhang,Bin He,Weiming Lü
The fabrication and transfer of freestanding single-crystal ferroelectric membranes deserve intensive investigations as to their potential applications in flexible wearable devices, such as flexible data storage devices and varied sensors in E-skin configurations. In this report, we have shown a comprehensive study approach to the acquisition of a large-area freestanding single-crystal ferroelectric BaTiO3by the Sr3Al2O6scarification layer method. By controlling the thickness of the BaTiO3and Sr3Al2O6, the exposed area of the Sr3Al2O6interlayer, and the utilization of an additional electrode La2/3Sr1/3MnO3layer, the crack density on the freestanding BaTiO3can be dramatically decreased from 24.53% to almost none; then, a more than 700 × 530 μm2area high-quality freestanding BaTiO3membrane can be achieved. Our results offer a clear and repeatable technology routine for the acquisition of a flexible large-area ferroelectric membrane, which should be instructive to other transition metal oxides as well. Our study can confidently boost flexible device fabrication based on single-crystal transition metal oxides.Keywords:crack density;ferroelectrics;freestanding;single crystal
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2020
·Vol. 10
·期 38
·22616-22621
·
IF 3.119
Liren Wang,Han Wang,Yanming Liu,Xinyu Wang,Peng Tao,Wen Shang,Benwei Fu,Chengyi Song,Tao Deng
This paper introduces an approach to synthesize bimetallic nanoparticles under an alternating temperature field in aqueous solution. During the synthesis, pyro-catalytic barium titanate is used as the substrate to reduce the metallic ions dispersed in the solution due to the generated charges at the surface of pyro-materials under temperature oscillation. Chloroauric acid and potassium tetrachloroplatinate are used as precursors to produce gold/platinum bimetallic nanoparticles through a pyro-catalytic process. Transmission electron microscopy characterization, in combination with energy dispersive X-ray spectroscopy mapping, demonstrates that the bimetallic nanoparticle is composed of an Au core and Au/Pt alloy shell structure. Compared to the conventional approaches, the pyroelectric synthesis approach demonstrated in this work requires no toxic reducing agents and waste heat can be used as a thermal energy source in the synthesis. Hence, it offers a potential “green” synthetic method for bimetallic nanoparticles.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 24
·24LT01
·
IF 3.551
Tingting Cai,Yun Yang,Ting Bi,Ernest Bi,Yanfang Li
Recently, polyacrylonitrile (PAN) fiber films have shown greater advantages over polyvinylidene fluoride (PVDF) in the field of energy harvesting. Adding other substances with high piezoelectric coefficient is worth exploring to further improve the output voltage of PAN. Here, we successfully dispersed high dielectric constant barium titanate in PAN nanofiber films with different dosages using an electrospinning technology. The X-ray diffraction and Fourier transform infrared spectroscopy results indicated that BaTiO3 nanoparticles aid in transforming PAN from a 31-helical conformation to a planar zigzag conformation, thus improving the output voltage of PAN nanofibers significantly and also promoting its mechanical properties. In addition, the human body function monitoring experiment showed a good response current to the rhythm of elbow bending, knee bending, running, and breathing. Besides, when a simple rectifier circuit was applied, the capacitor could be charged to 2 V in less than 2 min and light a commercial LED through repeated tapping.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Jiyuan Chen,Feng Luo,Yuanshui Liu,Denghui Jiang,Linzhuang Xing,Zhimin Li
The lead-free BiFeO 3 -BaTiO 3 (BF-BT) based ceramics with large piezoelectric coefficient ( d 33 ) have been desired for promising applications in high-temperature fields. Herein, the 0.7Bi(Fe 0.9985 Mn 0.0015 )O 3 -0.3BaTiO 3 ceramics with different grain sizes are intentionally prepared by solid-state method, and a large d 33 (232 pC/N) and high Curie temperature T c (501 °C) are simultaneously achieved in the case of large grain size (>9 µm). X-ray diffraction and Rietveld refinement analyses indicate that these coarse-grained samples possess stronger rhombohedral distortion and enlarged lattice parameter compared to fine-grained samples, which make domain switching easier and give rise to the increase in strain. As a result, the piezoelectric and ferroelectric properties of such samples are significantly improved with increasing grain size from 3.05 µm to 9.07 µm. In addition, electric domain configuration and field-induced strain further prove that the strong piezoelectric response in coarse-grained samples is attributed mainly to enhanced non-180° domain mobility. This study reveals the origin of large piezoelectric response in coarse-grained BF-BT ceramics, and proposes an effective approach to improve the piezoelectric properties of BF-BT ceramics.
研究领域:
材料科学
·
物理学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2025
·
IF 14.3
Liguo Jin,Hanpeng Liu,Congyang Mao,Chaofeng Wang,Shuilin Wu,Khin Wee Lai,Yu Zhang,Zhaoyang Li,Shengli Zhu,Hui Jiang,Zhenduo Cui,Jie Shen,Yufeng Zheng,Xiangmei Liu
Osteomyelitis is a state of inflammation caused by pathogens with progressive bone destruction. In critical conditions, osteomyelitis can result in limb necrosis, dysfunction, and permanent disability. Traditional treatments for osteomyelitis usually include antibiotics and surgical debridement. However, overuse of antibiotics can result in bacterial resistance and serious side effects. In this paper, a microwave (MW)-responsive composite MoS 2 /Bi 2 S 3 /BaTiO 3 was constructed from flaky nanoflower molybdenum disulfide (MoS 2 ), rod-shaped bismuth sulfide (Bi 2 S 3 ), and bulk barium titanate (BaTiO 3 ) for the therapy of bacteria-infected osteomyelitis. Under MW irradiation, MoS 2 /Bi 2 S 3 /BaTiO 3 could generate MW heat and reactive oxygen species (ROS), and its MW thermal response mechanism was investigated by MW vector analysis, which showed that the MW thermal response performance of MoS 2 /Bi 2 S 3 /BaTiO 3 was devoted to the reflection loss, dielectric loss, and suitable impedance matching and attenuation constants induced by the interfacial polarization, dipole polarization, and ferroelectrode polarization. Under MW irradiation, due to strong electromagnetic field enhancement parameters and low oxygen adsorption energy, MoS 2 /Bi 2 S 3 /BaTiO 3 could form a heterogeneous interface to accelerate charge transfer, resulting in ROS. The antibacterial mechanism of MoS 2 /Bi 2 S 3 /BaTiO 3 was investigated by bacterial transcriptome RNA sequencing analysis, which indicated that MoS 2 /Bi 2 S 3 /BaTiO 3 had excellent antibacterial properties.
研究领域:
医学
·
生物工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2021
·Vol. 31
·期 49
·2106082
·
IF 18.808
Xinglin Tao,Shuyao Li,Yuxiang Shi,Xingling Wang,Jingwen Tian,Zhaoqi Liu,Peng Yang,Xiangyu Chen,Zhong Lin Wang
Due to the thermionic emission effect, the electron transferred to dielectric surface can be released into vacuum after the contact electrification (CE). Therefore, triboelectric nanogenerator (TENG) cannot maintain effective electrical output under high temperature conditions. In order to obtain high thermal charge stability, polyimide is modified with strong electron withdrawing groups like trifluoromethyl ( CF 3 ) and sulfone group ( SO 2 ) in backbone. The fluorinated polyimides (F-PI) with a big band gap can provide a tribocharge density of 170 µC m −2 (4 times of common Kapton film) and become more negative than polytetrafluoroethylene in triboelectric series. In addition, BaTiO 3 nanoparticles are doped in F-PI film for inducing deep traps and interfacial polarizations for CE, which can further enhance the charge density (200 µC m −2 ) and thermal charge stability. Finally, a flutter-driven TENG (FD-TENG) is designed based on this BaTiO 3 -doped F-PI film to harvest wind energy and sense wind velocity. This FD-TENG can maintain 32% of its output performance at 200 °C in comparison with room temperature, which is the highest thermal charge stability reported for triboelectric polymers. Therefore, this BaTiO 3 -doped F-PI has great application prospects for energy generation and motion detection in hot wind tunnel and many other harsh environments.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2024
·
IF 5.8
Rong Lang,Qifan Chen,Tingting Gao,Jianguo Zhu,Jie Xing,Qiang Chen
Barium titanate (BaTiO 3 , BT) is widely used in capacitors because of its excellent dielectric properties . However, owing to its high remanent polarisation ( P r ) and low dielectric breakdown field strength ( E b ), achievement of high energy storage performance is challenging. Herein, a systematic strategy was proposed to reduce P r and elevate E b of BT via: (i) modification of the relaxor behavior by alloying it with Bi(Mg 2/3 Ta 1/3 )O 3 (BMT) and (ii) heightening E b by introducing NaTaO 3 (NT) with high band gap. Consequently, the energy storage efficiency ( η ) of 90 % and high E b of 780 kV cm −1 were achieved simultaneously for the BT-BMT- x NT system, which facilitated the recoverable energy density ( W rec ) of 6.02 J cm −3 . At 300 kV cm −1 , its temperature (20–120 °C) and frequency (1–500 Hz) stabilities were found to be good. Moreover, the BT-BMT-0.15NT possessed ultrafast discharge rate ( t 0.9 < 51 ns) and ultrahigh power density ( P D > 94 MW cm −3 ). This study offers an effective strategy for the design of novel high-performance dielectric energy storage materials .
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2026
·
IF 14.1
Pan Liu,Xiang Ren,Jin Qian,Haihua Huang,Peng Li,Peng Fu,Jigong Hao,Huarong Zeng,Wei Li,Zhenxiang Cheng
Electrostatic energy storage using dielectrics plays a vital role in advanced electronics and high-power electrical systems. While superparaelectric materials offer great potential for achieving high recoverable energy density ( W rec ) and efficiency ( η ), their practical applications have been hindered by intrinsically low polarization. Herein, a polymorphic superparaelectric engineering approach that simultaneously enhances polarization and breakdown strength was introduced. By constructing coexisting cubic-orthorhombic-tetragonal (C-O-T) superparaelectric states in BaTiO 3 -based ceramics, the energy barrier for polarization switching is effectively reduced, leading to improved macroscopic polarization and reinforced breakdown endurance. As a result, the optimized polymorphic superparaelectric ceramics achieve a high W rec of 9.8 J cm −3 and η of 88.5% under 820 kV cm −1 , along with exceptional stability-frequency stability with W rec variation within ±0.6% and η variation within ±3.3% from 1 to 400 Hz, and fatigue stability with both W rec and η varying below ±0.3% over 10 5 cycles. These results underscore the material's promise for high-energy pulsed power applications and establish a new design strategy for next-generation dielectric capacitors.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2026
·
IF 5.8
Meidan Que,Xiangwei Bai,Tengjiao Xue,Ziang Liu,Jiaojiao Zheng,Xun Sun,Jun Xu
Barium titanate (BaTiO3) exhibits high chemical stability; however, the relatively rapid recombination of charge carriers severely limits its photocatalytic performance. Meanwhile, electrocatalysis facilitates charge transport by generating a spontaneously polarized electric field, effectively suppressing charge carrier recombination, but the performance of conventional ferroelectric catalysts is inherently constrained by their low surface piezopotential. In this study, a piezo-photocatalytic system triggered by ultrasonic vibration is reported, based on BaTiO3 nanobats. The BaTiO3 structure resembles a nanobat, featuring a thicker lower cylindrical body (∼35 nm diameter) and a thinner upper section (∼20 nm diameter) with a total length of about 250 nm. It can generate a piezo-potential as high as 1.2 V through COMSOL finite element simulation. Under mild vibration, the BaTiO3 nanobats exhibit superior piezo-photocatalytic performance, converting CO2 into CO with a maximum yield of 101.18 μmol·g–1·h–1. The yield is approximately five times higher than that achieved with ultraviolet light irradiation alone. Furthermore, theoretical calculations reveal that the adsorption and desorption of intermediates (*COOH, *CO) on BaTiO3 can be regulated by applying different strains. The piezo-photocatalytic CO2 reduction reaction opens an avenue beyond conventional photocatalysis, expanding energy utilization to pave the way for carbon neutrality.
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Hongjun Zhang,Yingchun Liu,Wenming Shi,Chunying Wang,Bin Yang
Template crystals with high diameter-to-thickness ratio (DTR) were critical to prepare high-performance texture piezoelectric ceramics . The (111) BaTiO 3 templates with high DTR larger than 15 were prepared using the molten salt synthesis. Firstly, the optimized molar ratios of BaCO 3 /TiO 2 and NaCl/KCl for the Ba 6 Ti 17 O 40 (B6T17) precursor were 6.9:17 and 3:1, respectively. The TG-DSC analysis revealed that the optimal calcination temperature was 1060 °C. Secondly, the highest DTR value for B6T17 could reach at 50:1, which further guaranteed final DTR of (111)-oriented BT templates ranged from 15 to 20 by calcined at 950 °C. The excessively high ratios of NaCl/KCl and high calcination temperature were harmful to the high DTR and the template integrity. Finally, activated (111) BT templates induced matrix powders to form textured diamond-shaped grains successfully.
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·Vol. 43
·期 3
·2969-2973
·
IF 2.758
Bing Xie,Haibo Zhang,Hao Kan,Sisi Liu,Ming-Yu Li,Zeyu Li,Shuai Zhu,Shiyong Qiu,Shenglin Jiang
This work demonstrates a highly efficient method for large-scale synthesis of elongated BaTiO 3 nanowires via a novel stirring hydrothermal process. Compared with conventional hydrothermal reaction , one-dimensional (1D) lead-free BaTiO 3 nanowires can be realized at an even lower temperature with a shorter dwelling time. Results suggest that the mechanical force-driven stirring process improved the diffusion and surface reaction rate of BaTiO 3 nanocrystal growth in the solution phase, apparently, leading to the growth of the BaTiO 3 nanowires via an oriented attachment mechanism. Meanwhile, to the best of our knowledge, this method is also the first reported protocol which is capable to grow elongated BaTiO 3 nanowires with length up to tens of micrometers. This research outcome provides a promising option for low cost, high-throughput fabrication of 1D nanostructure in respect of mass-manufacturing.
研究领域:
材料科学
·
纳米科技
·
无机合成
·
功能材料
·
铁电材料
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Yuqing Chen,Jun Zhou,Yongfei Li,Chengxiang Chen,Beibei Jia,Haomin Guo,Zixuan Zhang,Kai Wu
Polymer-based dielectric composites with inorganic oxide fillers could exhibit synergistic physical and chemical characteristics from both advantages, which have flexible applications in electrical and electronic technology. As composites with various substances, the interfacial structure plays a key role in the electric and dielectric properties. In this work, BaTiO3 particles were embedded in polyvinylidene fluoride (PVDF) by a solution crystallization process. The conductivity and dielectric constant of the composites increased with the increase of the BaTiO3 filler contents. The charge injection and dissipation behavior at the nanointerface of the composite is investigated by Kelvin probe force microscopy. It is found that the charges are more easily injected into the nanointerface between the particle and the polymer. The accumulation and dissipation of surface charges obey the exponential law. The space-charge polarization is also suggested to be a key factor of injection, while the charge dissipation is determined by charge tunneling. The result also demonstrates that the strong interfacial polarization between the BaTiO3 particles and the PVDF matrix plays a crucial role in the dielectric properties. This work provides significant insights into understanding the interfacial charge transport in dielectric composites.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）