Nanomaterials
·
2023
·Vol. 13
·期 3
·487
·
IF 5.3
Xiaolei Shang,Xiaoling Men,Qifeng Kuang,Shaojie Li,Da Li,Zhidong Zhang
Organic–inorganic hybrid materials built by inorganic and organic building units have attracted intensive interest in the past decades due to unique chemical and physical properties. However, rare organic–inorganic hybrid materials show excellent permanent magnetic properties. Here, we develop a facile chemical solution method to bottom-up synthesize a new hybrid (Fe2Se3)2[Fe(dien)2]0.9. This hybrid phase with the space groupP21/c(14) possesses a rodlike shape with a diameter of 100–2000 nm and a length of 5–50 µm. The hybrid rods are ferrimagnetic with a Curie temperature (TC) of 11 K. They show a high coercivity (HC) of 4.67 kOe and a saturation magnetization (MS) of 13.5 emu/g at 2 K. Compared with orthorhombic (FeSe2)2Fe(dien)2, the excellent magnetic performance of the hybrid rods is ascribed to the monoclinic hybrid structure built by Fe(dien)2complexes and Fe2Se3double chains. Our study provides guidance for connecting inorganic fragments of FeSe2single chains, Fe2Se3double chains or β-Fe3Se4layers with Fe(dien)2complexes for organic–inorganic hybrid phases with varied crystal structures and magnetic properties.Keywords:organic–inorganic hybrid materials;chemical solution method;Fe2Se3double chains;coercivity
研究领域:
材料科学
·
磁学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 6
·5771-5779
·
IF 2.195
Liu Heng,Zheng Shuaizhi,Chen Qiang,Zeng Binjian,Jiang Jie,Peng Qiangxiang,Liao Min,Zhou Yichun
HfO 2 thin films with different praseodymium doping contents (Pr:HfO 2 ) were fabricated by chemical solution deposition (CSD) method at ambient conditions. The chemical bonding and the composition of Pr doped HfO 2 thin film were characterized by X-ray photoelectron spectroscopy (XPS), while the structural properties were investigated by glancing incidence X-ray diffraction (GIXRD) and high resolution transmission electron microscopy (HRTEM). It is found that the ferroelectric orthorhombic phase was induced in the HfO 2 based thin films by Pr doping. The combined results of P–E (polarization–electrical field) and C–V (capacitance–voltage) measurements demonstrated that the 5 mol% Pr doped HfO 2 film exhibited a distinct ferroelectricity, with a maximum remanent polarization ( P r ) of 6.9 µC/cm 2 and a coercive field ( E c ) of 1.2 MV/cm. Notably, the polarization did not show obvious degradation over 1 × 10 8 switching cycles, suggesting good endurance performance of the Pr doped HfO 2 thin film. These results indicate that Pr dopant could effectively induce ferroelectricity in HfO 2 thin films, thereby becoming a new member of dopants for HfO 2 based ferroelectrics.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2022
·Vol. 10
·期 23
·12632-12642
·
IF 14.511
Liang Shu,Xin Zhang,Wei Li,Jing Gao,Hongliang Wang,Yu Huang,Yue-Yu-Shan Cheng,Qian Li,Lisha Liu,Jing-Feng Li
AgNbO3-based antiferroelectric films have attracted emerging attention in the field of dielectric energy storage and possess promising applications in photocatalysis and microwave devices. Unfortunately, it remains a challenge to fabricate pure-phase AgNbO3 films on Si substrates, precluding their further integration into electronic devices. Here, we, for the first time, report phase-pure AgNbO3 films on Pt/Ti/SiO2/Si substrates by a chemical solution deposition (CSD) method. A facile CSD route without using the hazardous pyridine additive is demonstrated to obtain a stable AgNbO3 precursor for spin-coating films. By comprehensively controlling the heat treatment conditions, secondary phases are eliminated in the deposited films. The phase transitions of the AgNbO3 films are also investigated, where intriguingly the room temperature phase is determined to be the antiferroelectric M2 phase, rather than the commonly reported M1 phase in bulk AgNbO3. Meanwhile, the relative dielectric permittivity surpasses 300 at room temperature and maintains at ∼400 with low dielectric loss (<0.05; measured at frequencies of 0.1–1 MHz) over a wide temperature range of 150–350 °C, within a 5% variation. This work provides an easy-to-implement process of AgNbO3 films which may attract scientific interests and potential applications.
研究领域:
材料科学
·
电子工程
·
能源存储
✓ 已验证
DOI
高影响因子
THIN SOLID FILMS
·
2013
·
IF 1.604
Shufang Wang,Shanshan Chen,Guoying Yan,Fuqiang Liu,Shouyu Dai,Jianglong Wang,Wei Yu,Guangsheng Fu
c-axis oriented nanocrystalline Bi 2 Sr 2 Co 2 O y thin films with the average grain size of 25 nm have been achieved by chemical solution deposition combined with a rapid annealing process in oxygen. The resistivity and Seebeck coefficient of the nanostructured films are about 7.0 mΩ·cm and 171 μV/K at 873 K, resulting in a power factor 2–3 times larger than that of the best reported value in the coarse-grained Bi 2 Sr 2 Co 2 O y polycrystalline bulks. Since the thermal conductivity can be greatly reduced due to the increased phonon scattering at the grain boundaries of nanocrystalline films as well as at film surface and at film/substrate interface, great improvements in the ZT are expected in the nanocrystalline Bi 2 Sr 2 Co 2 O y thin films .
研究领域:
材料科学
·
凝聚态物理
·
无机非金属材料
·
能源材料
✓ 已验证
DOI
高影响因子
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
·
2021
·Vol. 98
·期 1
·24-30
·
IF 2.326
Lu Qingjian,Gao Min,Lu Chang,Pan Taisong,Cheng Tiedong,Long Fei,Lin Yuan
Vanadium dioxide (VO 2 ) has unique electrical and optical properties, which have practical applications in many devices. However, preparing high-quality VO 2 films and transferring them to flexible substrates by an economic and simple way are still challenging. Functional thin films can be grown on van der Waals (vdW) substrates and then transferred to flexible substrates due to the weak interaction between films and their substrates. Herein, VO 2 thin films were grown on mica substrates by using the polymer-assisted deposition technique. By controlling the ion concentration in the polymer precursor solution, a flat seed layer was prepared at the initial growth stage. It was found that the introduction of the seed layer can improve the crystallinity, increase the grain size and reduce the defects of the VO 2 thin films. It is believed that less nucleation density and layered growth at the initial growth stage are critical to the formation of large size grains. Our results confirmed that chemical solution deposition can prepared high-quality VO 2 films on vdW substrates.
研究领域:
材料科学
·
表面科学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2021
·Vol. 11
·期 4
·890
·
IF 5.076
Yong Li,Qifeng Kuang,Xiaoling Men,Shenggang Wang,Da Li,Chuljin Choi,Zhidong Zhang
α″-Fe16N2nanomaterials with a shape anisotropy for high coercivity performance are of interest in potential applications such as rare-earth-free permanent magnets, which are difficult to synthesize in situ anisotropic growth. Here, we develop a new and facile one-pot microemulsion method with Fe(CO)5as the iron source and tetraethylenepentamine (TEPA) as the N/C source at low synthesis temperatures to fabricate carbon-coated tetragonal α″-Fe16N2nanocones. Magnetocrystalline anisotropy energy is suggested as the driving force for the anisotropic growth of α″-Fe16N2@C nanocones because the easy magnetization direction of tetragonal α″-Fe16N2nanocrystals is along the c axis. The α″-Fe16N2@C nanocones agglomerate to form a fan-like microstructure, in which the thin ends of nanocones direct to its center, due to the magnetostatic energy. The lengths of α″-Fe16N2@C nanocones are ~200 nm and the diameters vary from ~10 nm on one end to ~40 nm on the other end. Carbon shells with a thickness of 2–3 nm protect α″-Fe16N2nanocones from oxidation in air atmosphere. The α″-Fe16N2@C nanocones synthesized at 433 K show a room-temperature saturation magnetization of 82.6 emu/g and a coercive force of 320 Oe.Keywords:α″-Fe16N2;permanent magnetic material;one-dimensional nanocones;core/shell structure;anisotropic growth;chemical solution method
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2021
·Vol. 32
·期 11
·14274-14285
·
IF 2.478
Gao Qianqian,Dai Yuqiang,Wei Xile,Zhou Changping,Gong Wenfeng,Song Haixiang,Guo Zhanhu,Li Chengbo
The Aurivillius compound Pb x Bi 6− x Fe 0.5 Co 0.5 Ti 4 O 18 thin films were prepared via chemical solution deposition method and the influence of Pb 2+ ions doping on the structure, ferroelectric and leakage properties were studied. With the increasing concentration of Pb 2+ ions, the lattice distortion is increased and the growth of the films along ab plane is promoted. The calculation results show that the internal stress of the films increases with the increase of Pb 2+ concentration. For the samples with low Pb 2+ doping concentration ( x < 0.6), the leakage current densities are also decreased, which can be attributed to the decrease in oxygen vacancy concentration. Due to the enhanced lattice distortion and decreased leakage current densities, the ferroelectric properties are improved. The film with x = 0.2 has a high saturation polarization of 42.3 µC/cm 2 . According to the fitting results, the leakage conduction mechanism is attributed to the combined effect of space-charge-limited conduction mechanism and ionic conduction mechanisms.
研究领域:
材料科学
·
凝聚态物理
·
功能材料
·
铁电学
·
薄膜制备
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 19
·195705
·
IF 3.551
Chen Wang,Qinghua Yi,Qiang Zhang,Fumao Wang,Guifu Zou
Cu2BaSn(S1−xSex)4 has shown great prospects in the photoelectric field due to Earth-abundance, low toxicity, cost efficiency, direct bandgap, high absorption coefficient (>104 cm−1) and reduced anti-site disorder relative to Cu2ZnSn(S1−xSex)4. A fully-tunable ratio of S/Se is the key to broaden the bandgap of Cu2BaSn(S1−xSex)4. Here, we introduce a thionothiolic acid metathesis process to readily tune the stoichiometry of Cu2BaSn(S1−xSex)4 films for the first time. Different stoichiometric Se/(S + Se) of Cu2BaSn(S1−xSex)4 from zero to one can vary the bandgap range from 2 to 1.68 eV. The grain size of Cu2BaSn(S1−xSex)4 films can be grown more than 10 μm. The optimized bandgap and high-quality growth of Cu2BaSn(S1−xSex)4 films ensure the best power conversion efficiency of 2.01% for solution-processed Cu2BaSn(S1−xSex)4 solar cells. This method provides an alternative solution-processed way for the synthesis of fully stoichiometric Cu2BaSn(S1−xSex)4.
研究领域:
材料科学
·
太阳能电池技术
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry C
·
2016
·
IF 4.509
Huilin Zhao,Jianping Gao,Zeng Pan,Guanbo Huang,Xiaoyang Xu,Yahui Song,Ruinan Xue,Wei Hong,Haixia Qiu
The synthesis of poly-2-hydroxyethyl methacrylate inverse-opal hydrogel (IOHGPHEMA) was realized by capillary-force-induced in situ polymerization in a polystyrene colloidal crystal template. The created IOHGPHEMA films show brilliant blue-violet color when they are immersed in deionized water and reach swelling equilibrium. The stop band of the IOHGPHEMA films can be tuned within the entire visible wavelength range by immersing them into different chemical solutions, such as aldehydes, ketones, amides, dimethyl sulfoxide, and alcohols. The extent of the reflective peak shift not only depends on the number of hydrogen band donors but also on the chain length and structure of the chemicals and their concentration. Since the IOHGPHEMA films have different reflectance spectra and structural colors in response to different compounds of the same series, this provides a potential way to visually detect homologues and other compounds with similar structure and properties. This simple, yet effective, method also has the potential to be used generically to determine approximate concentration of the solution by direct visual observation of the color change.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
NANOTECHNOLOGY
·
2024
·Vol. 35
·期 38
·385705
·
IF 2.9
Yongguang Xiao,Lisha Yang,Yong Jiang,Siwei Liu,Gang Li,Jun Ouyang,Minghua Tang
Lu doped Hf0.5Zr0.5O2 (HZO) ferroelectric films were prepared on Pt/TiN/SiO2/Si substrate by chemical solution deposition method, and an interfacial engineering strategy for improving the ferroelectric property was explored by capping the Lu doped HZO films with a cerium oxide layer. Compared with the Lu doped HZO film without the CeOx coating layer, the Lu doped HZO film with the CeOx coating layer has a larger remanent polarization (2Pr = 34.72 µC cm−2) and presents weaker wake-up behavior, which result from the higher orthogonal phase ratio and the lower oxygen vacancy of the CeOx coated Lu doped HZO film. In addition, the CeOx coating can remarkably improve the fatigue resistance and retention performance of the Lu doped HZO films. It is hoped that the results can provide an effective approach for the realization of high-performance and highly reliable hafnium oxide based ferroelectric thin films.
研究领域:
材料科学
·
铁电材料
·
薄膜
✓ 已验证
DOI
高影响因子
JOURNAL OF APPLIED PHYSICS
·
2020
·Vol. 128
·期 23
·
IF 2.286
Yu Ziyi,Cai Henghui,Fu Zhengqian,Zhang Linlin,Chen Xuefeng,Wang Genshui,Dong Xianlin,Xu Fangfang
Compared to the bulky ceramic counterparts, antiferroelectric (AFE) thin films exhibit higher energy-storage performance. It has been demonstrated that the performance of the AFE thin films is strongly affected by the thickness. However, possible changes in the phase structures and microstructures accompanied by varying thicknesses have been less known, which makes it hard to fully understand the physical insight of the thickness effect. Herein, we fabricate a series of PbZrO 3 (PZ) thin films by chemical solution deposition whose thickness is approximately proportional to the number of deposition layers, i.e., one to four layers with each layer of about 60 nm in thickness. The detailed structural characterization has been performed by using x-ray diffraction, a scanning electron microscope, and a transmission electron microscope. The films are composed of nanorods oriented normal to the films in which each nanorod maintains single crystalline though segmented by the horizontal interfaces between each of the two neighboring layers, suggesting nearly perfect epitaxy during multilayer growth. The multidomain state is found in three-/four-layer PZ thin films while the one-/two-layer PZ films always present a monodomain state. Meanwhile, incommensurate phases with different modulation periods have been observed in the four-layer PZ films. By comparing the as-observed structural features with the measured electrical properties of different films, it seems that microstructural evolution with the film thickness should not be negligible in evaluating the structure–property relation of PZ-based thin films.
研究领域:
材料科学
·
物理学
·
电气工程
✓ 已验证
产品关联
DOI
高影响因子
TALANTA
·
2016
·
IF 4.035
Liangfei Ouyang,Qian Liu,Chaoping Xu,Changgui Liu,Heng Liang
We developed paper-based powder X-ray diffraction (PP-XRD) to implement phase identification and/or crystal structure determination on paper-based platforms. These aims are not possible with other paper-based detectors, such as Raman spectroscopy and mass spectrometry. PP-XRD overcomes these limitations. Here we reported the simple and low-cost in situ PP-XRD protocol for phase identifications of inorganic and organic materials. We demonstrated that sample amounts of lead nitrate on paper substrate can be reduced into 1/30 of conventional ones by using the standard glass substrate at the same signal-to-noise ratio (S/N) of the X-ray diffraction (XRD) pattern. The paper-based method was comparable in sample quantity and intensity with zero background holder method, even though single crystal Si(100) substrate as zero background holder was used for the specimen preparation of CTAB (C 19 H 42 BrN). More importantly, paper substrates helped reduce preferred orientation that was generally present in routine powder XRD. Also, combined with paper chromatography , overlap peaks were eliminated in the XRD detection patterns of lead nitrate and cobalt nitrate hexahydrate. This new PP-XRD protocol may accelerate the process to identify phase or determine the molecular structures of new materials using trace sample directly. It also includes a hyphenated technique of powder XRD with a simple paper-based microfluidic separation of chemical solutions .
研究领域:
材料科学
·
分析化学
·
X射线衍射
·
基于纸的设备
·
微流控技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）