Article
Materials Science, Ceramics
Ye Chen, Yike Du, Dongming Fan, Huiyan Niu, Yuandong Zuo, Liangwei Hu, Kanghui Liu, Meng Shen, Xunzhong Shang, Yong Chen
Summary: By doping with K element, the lattice distortion of NBCT ceramics can be improved, and defect dipole pairs can be formed by adjusting defects. The optimized ceramic material exhibits good piezoelectric properties and dielectric characteristics at high temperatures.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Inorganic & Nuclear
Chen Li, Ke Liu, Dequan Jiang, Cheng Jin, Tianyao Pei, Ting Wen, Binbin Yue, Yonggang Wang
Summary: This study reports materials with negative, zero, and positive thermal expansion behaviors, which are hexagonal CrTe, monoclinic Cr3Te4, and trigonal Cr5Te8 in NiAs-type defective Cr1-delta Te. These materials show obvious anisotropic thermal expansion and the properties are confirmed to be originated from the magnetovolume effect through magnetic measurements. The materials with similar compositions but different structures provide a new research direction for tuning the negative thermal expansion properties of materials and searching for materials with zero thermal expansion.
INORGANIC CHEMISTRY
(2022)
Article
Materials Science, Ceramics
Shuai Huang, Kang Zhu, Jun Huang, Jiwen Yang, Jianlin Wang, Zhengping Fu, Ranran Peng, Yalin Lu
Summary: In this study, a superstructure oxide Sr4Fe5CoO13-delta was successfully prepared via combustion method. The Co dopant improved the amount of oxygen vacancies in the oxide. Unlike other oxides, Sr4Fe5CoO13-delta showed localized electrical behavior at low temperatures and exhibited ferromagnetic property with a high Curie temperature. Therefore, this oxide has a broadened working temperature range and may contribute to the exploration of high temperature spintronic devices.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
Jia Guo, Suyun Wang, Wenmin Li, Dabiao Lu, Xubin Ye, Zhehong Liu, Shijun Qin, Xiao Wang, Zhiwei Hu, Hong-Ji Lin, Chien-Te Chen, Jianguo Wan, Qinfang Zhang, Youwen Long
Summary: In this study, a new type of transition-metal-only quadruple perovskite oxide MnCu3Mn4O12 was prepared and its physical properties were investigated. Experimental and theoretical results reveal that the A-site Mn2+ spins play a crucial role in tuning the magnetic and electrical transport properties.
Article
Chemistry, Physical
Long Hou, Mingrui Li, Chao Jiang, Xingdu Fan, Qiang Luo, Shuangshuang Chen, Peidi Song, Weihuo Li
Summary: The partial substitution of Fe by Co in Fe83.2-xCoxB10C6Cu0.8 amorphous alloys expands the crystallization window, increases the Curie temperature, and affects the magnetic properties. Co doping regulates the first increase and then decrease of saturation magnetization, achieving a maximum value with 6 at.% Co doping. This study demonstrates the potential of Co doping in improving the magnetic properties of Fe-based amorphous alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Inorganic & Nuclear
Jiayuan Gu, Qingkai Tang, Zhiwei Wu, Kang Yi, Jie Ding, Liangdong Chen, Xinhua Zhu
Summary: We studied sol-gel-derived SCRO ceramics, and found that they exhibit high-temperature ferrimagnetism and intrinsic semiconducting properties, which are promising for oxide spintronics.
INORGANIC CHEMISTRY
(2023)
Article
Materials Science, Ceramics
Wen Mo, Xin Luo, Yangyang Zhang, Huiyan Niu, Ziyan Fang, Liangwei Hu, Kun Liu, Qifan Li, Yong Chen, Meng Shen
Summary: In this work, Na0.5Bi4.5Ti3.94-xMn0.06NbxO15+y bismuth-layered ferroelectric ceramics were prepared and the effect of Nb5+ content on crystal morphology, electrical properties, and piezoelectric performance was systematically investigated. The introduction of Nb5+ increased the ratio of b/a lattice parameter, leading to octahedral distortion and structural transformation tendency, which improved the ferroelectric properties and achieved enhanced piezoelectric performance in Na0.5Bi4.5Ti3.94-xMn0.06NbxO15+y ceramics.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Yuandong Zuo, Ziyan Fang, Dongming Fan, Kanghui Liu, Huiyan Niu, Husheng Wang, Yike Du, Meng Shen, Xunzhong Shang, Zhang Li, Yong Chen
Summary: The enhanced piezoelectric performance with high piezoelectric coefficient (d(33)) and high Curie temperature (T-c) has been achieved by replacing Ti4+ with Co3+ in lead-free piezoelectrics.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Yuying Wang, Deyi Zheng, Runyu Mao, Xu Wang
Summary: The construction of intergrowth structure is an effective method to improve the electrical properties of Bismuth Layer Structured Ferroelectrics (BLSFs). However, there are few studies on the influence of intergrowth structure construction on the internal defects and electrical properties. In this study, ceramic samples with intergrowth bismuth layer structure were fabricated and systematically investigated. It was found that the construction of intergrowth structure can significantly inhibit the generation of oxygen vacancies, leading to improved performance of the ceramics.
FRONTIERS IN CHEMISTRY
(2022)
Article
Engineering, Electrical & Electronic
Yunjing Shi, Hongli Wu, Yang Liu, Zunqi Liu, Jiwei Zhai
Summary: In this study, Hf-doped BiFeO3-based ceramics were prepared and their effects on the crystal structure and piezoelectric properties were investigated. The introduction of Hf led to an enlarged bond length and bond angle, resulting in a distorted structure of the R phase. The Hf4+ doping effectively increased the content of the R phase and enhanced the remanent polarization and piezoelectric response, while reducing the dielectric loss.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2023)
Article
Nanoscience & Nanotechnology
Q. Jing, X. Q. Deng, Z. H. Zhang
Summary: The electronic properties of CrI3/SnC heterostructure are investigated, showing a higher Curie temperature (Tc) of 57.1 K compared to monolayer CrI3 (around 45 K), and magnetization of nonmagnetic SnC monolayer. The heterostructure exhibits an intrinsic type-II band alignment with a band gap (Eg) of 0.34 eV, facilitating the separation of photogenerated electrons and holes. The electronic properties of the heterostructure can be effectively tuned by strain and electric field (Eext).
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2023)
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
Nazima Nazir, Afreen Ikram, Mohd Ikram
Summary: This study investigates the magnetization and optical characteristics of Sr-doped Gd2NiMnO6. The Curie temperature (TC) increases with doping. The replacement of a non-magnetic Sr+2 ion reduces the spin couplings, inhibiting AFM ordering and increasing the curie temperature for the doped sample. Additionally, decreased bandgap with doping was observed. Raman shows two strong modes and FTIR shows two strong absorption bands caused by metal-oxygen stretching bands. The as-prepared samples may be used as a photocatalyst and the reduction in bandgap due to doping may find applications in solar cells.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2023)
Article
Physics, Applied
Mu Lan, Rong Wang, Yu Song, Su-Huai Wei
Summary: The difficulty of increasing the Curie temperature Tc of magnetic semiconductors such as (Ga,Mn)As above room temperature is due to the p-type doping bottleneck. To overcome this bottleneck, we investigated the doping properties of Mn in GaAs using hybrid functional calculations and proposed strategies to improve the p-type dopability in (Ga,Mn)As. We found that tensile strain and high temperature quenching are effective approaches to enhance p-type doping in epitaxial (Ga,Mn)As.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Crystallography
Juhyun Yoo, Sujin Kang
Summary: In order to enhance the piezoelectric properties and temperature stability of (Na,K)NbO3 system ceramics, newly manufactured ceramics were synthesized by adding antimony as a function of antimony substitution. The amount of antimony increased the grain size, enhanced the dielectric constant, and decreased the Curie temperature. The x = 0.07 sample sintered at 1060 degrees C showed the best electrical characteristics, making it the ideal material for piezoelectric speakers.
Article
Nanoscience & Nanotechnology
Xu Dong Gao, Shu Li Liu, Guang Tao Fei, Li De Zhang, Dan Dan Men, Yao Zhang, Shao Hui Xu, Xin Hua Li
Article
Materials Science, Multidisciplinary
Yong Shuai Wei, Shao Hui Xu, Li Gang Yuan, Biao Wang, Shu Li Liu, Guang Tao Fei
MATERIALS RESEARCH EXPRESS
(2020)
Article
Materials Science, Ceramics
Raphael J. Gehensel, Robert Zierold, Gunnar Schaan, Guoliang Shang, Alexander Yu Petrov, Manfred Eich, Robert Blick, Tobias Krekeler, Rolf Janssen, Kaline P. Furlan
Summary: The study demonstrates that using ALD technique can successfully introduce high Al2O3 content into zirconia nanostructures, inhibiting sintering compared to undoped zirconia. Additionally, for multinanolaminated and full-mix structures, tetragonal phase is stabilized up to 1200?C. The structures also exhibit a photonic band gap even after being heat treated at 1200?C for 2 hours, making them suitable for application as inverse opal photonic crystals in high-temperature environments.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Nanoscience & Nanotechnology
Yen Haentsch, Guoliang Shang, Bo Lei, Benedikt Winhard, Alexander Petrov, Manfred Eich, Elizabeth Holm, Gerold A. Schneider, Kaline P. Furlan
Summary: The study focuses on controlling the morphology and optical properties of photonic glass films through heteroaggregation process, utilizing a deep convolutional neural network model to classify microstructures and obtaining surface-templated inverse photonic glasses. Different color impressions and optical properties were achieved based on the heteroaggregation level, leading to enhanced structural coloration and improved film quality.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Shao Hui Xu, Jian Yong Huang, Guang Tao Fei, Yong Shuai Wei, Li Gang Yuan, Biao Wang, Xu Dong Gao
Summary: In this study, a double-layer two wavelength infrared antireflective coating was prepared using a sol-gel method, which effectively addressed the issue of thick infrared film not being resistant to high temperature annealing. The coating exhibited super hydrophilicity and excellent thermal shock resistance, making it suitable for high temperature irradiation environments.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Nanoscience & Nanotechnology
Honge Wu, Guang Tao Fei, Jiangang Gao, Jianyong Huang, Li De Zhang
Summary: In this study, a single-phase phosphor with excellent luminescent properties and thermal stability was successfully prepared, which has the potential for application in warm-white lighting.
ACS APPLIED NANO MATERIALS
(2022)
Article
Physics, Applied
Dongran Wang, Kai Xia, Haibin Tang, Zhulin Huang, Yao Zhang, Xiujuan Wang, Guangtao Fei, Guowen Meng
Summary: In this study, nonmetal plasmonic WO3-x nanosheets were used as the sensing material for photodetectors, showing sensitive response for the regulation of conductance through plasmonic hot free charge carriers. The results demonstrate the great potential of nonmetal plasmonic materials for photodetection.
APPLIED PHYSICS LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Guoliang Shang, Dongxue Bi, Vladimir Semenovich Gorelik, Guangtao Fei, Lide Zhang
Summary: This review summarizes the related theories, application-oriented structure tailoring, optical properties, and selected applications of anodic alumina photonic crystal. Anodic alumina photonic crystal is a porous periodic dielectric structure that has been extensively studied due to its straightforward preparation processes, porous features, high chemical, and thermal stability. The porous feature of the photonic crystal allows for versatile tailoring of its optical properties and results in strong light scattering.
MATERIALS TODAY COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Yafei Yan, Minxin Li, Kai Xia, Kemeng Yang, Dun Wu, Liang Li, Guangtao Fei, Wei Gan
Summary: Researchers fabricated a van der Waals heterostructure (vdWH) photodetector composed of rhenium disulfide (ReS2) and tellurium (Te), which exhibited a sensitive and broadband photoresponse with high on/off ratios. The photodetector achieved high responsivity and specific detectivity, as well as a fast photoresponse speed. Additionally, it showed a photovoltaic effect and could be used as a self-powered photodetector (SPPD).
Article
Chemistry, Multidisciplinary
Yafei Yan, Kai Xia, Wei Gan, Kemeng Yang, Gang Li, Xi Tang, Liang Li, Changjin Zhang, Guang Tao Fei, Hui Li
Summary: Hydrothermally synthesized 2D tellurium nanoflakes can be used for high-performance short-wave infrared photodetectors with high responsivity, fast rise and decay time, and high specific detectivity and external quantum efficiency.
Article
Chemistry, Multidisciplinary
Junxi Zhang, Huaping Zhao, Ming Gong, Lide Zhang, Zhijun Yan, Kang Xie, Guangtao Fei, Xiaoguang Zhu, Mingguang Kong, Shuyuan Zhang, Lin Zhang, Yong Lei
Summary: The nonuniformity of the nanochannel geometry in anodic aluminium oxide (AAO) membranes can affect their applications and the reflectance properties of nanostructures. Using depth-profiling transmission electron microscopy, the truncated conical geometry of the entire nanochannels was revealed, and an effective etching method was introduced to remove the nonuniformity.
Article
Chemistry, Physical
Shu Li Liu, Guang Tao Fei, Shao Hui Xu, Xu Dong Gao, Hui Li
Summary: An optical-controlled photocurrent transistor of Au/TiO2 was prepared by a sol-gel method, and its photoelectric properties were studied. The hot-electron photocurrent excited by infrared source light can be controlled by ultraviolet gate light, resulting in the enhancement of photocurrent by reducing the Schottky barrier between Au and TiO2. This transistor shows potential applications in signal enhancement, modulation, and switching.
JOURNAL OF PHYSICAL CHEMISTRY C
(2021)
Article
Nanoscience & Nanotechnology
Xiao Li Ma, Guang Tao Fei, Shao Hui Xu
Summary: The study investigated the removal ability of PANI/m-FB composites towards Cr(VI), with results showing a maximum removal capacity of 293.13 mg-g(-1) at a pH value of 5.0, and the ability to be regenerated and reused after treatment with strong acid. Kinetic study indicated that the adsorption procedure is mainly controlled by chemical adsorption, and the composites demonstrated excellent recycling performance and high removal ability.
NANOSCALE RESEARCH LETTERS
(2021)
Article
Materials Science, Multidisciplinary
Junxi Zhang, Wei Zhang, Wei Xu, Kang Xie, Qingsong Shan, Guangtao Fei, Junhui Jia, Xiaoguang Zhu, Lide Zhang, Zhiyong Fan, Haibo Zeng
Summary: Anodic aluminium oxide (AAO) membranes serve as templates for functional nanostructures with crucial characteristics that affect their applications. Utilizing an organic-inorganic hybrid self-pigmenting effect, the color of AAO membranes can be changed by tuning nanochannel size, dependent on both composition and structure.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
