Article
Multidisciplinary Sciences
Mitsuo Hara, Yuta Iijima, Shusaku Nagano, Takahiro Seki
Summary: Polysiloxanes, derived from silicates, exhibit various properties, with linear polysiloxanes unexpectedly self-assembling into ordered nanostructures in dry conditions and having reversible changes in modulus between moist and dry atmospheres.
SCIENTIFIC REPORTS
(2021)
Article
Multidisciplinary Sciences
Lutfor Rahman, Salina Rahman, Bristy Biswas, Md. Farid Ahmed, Moksodur Rahman, Nahid Sharmin
Summary: M-type strontium hexaferrite (SrM) was synthesized using co-precipitation technique with different sintering temperatures and mole ratios. The synthesized SrM was characterized and its properties were investigated. The structural parameters, particle size, and magnetic properties of the samples were found to vary with calcination temperature and composition. The synthesized SrM showed potential applications in magnetic recording media and photocatalysis due to its low coercivity, high saturation magnetization, and low band gap energy.
Article
Engineering, Electrical & Electronic
Peng Huo, Junhua Wang, Yi Liu, Yuquan Yan, Ziang Liu, Chenyu Shi, Aimin Chang, Jincheng Yao
Summary: In this paper, a new Pb-free negative temperature coefficient (NTC) thick film thermistor was successfully fabricated and the optimal sintering temperature was determined to be 1000 degrees Celsius. The experimental results provide important guidance for the development of high stability thick film NTC thermistors at lower sintering temperatures.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Materials Science, Multidisciplinary
Peixin Zhong, Genyu Chen, Shaoxiang Cheng, Mingquan Li
Summary: With the development of laser technology, laser-assisted glass frit bonding technology has been widely used in the packaging process of photoelectric devices. The behavior of glass frit during laser pre-sintering and bonding was studied. Traditional furnace pre-sintering can be replaced by laser pre-sintering for thin glass frit layers, while for thicker layers, furnace pre-sintering followed by laser re-sintering is necessary. Laser re-sintering can improve bonding strength and reduce porosity. Overall, laser plays a positive role in the pre-sintering process and fundamentally improves bonding quality.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2022)
Article
Materials Science, Ceramics
Collin J. Wilkinson, Anthony V. DeCeanne, Marc Dittmer, Christian Ritzberger, Markus Rampf, John C. Mauro
Summary: Predicting the effects of ceramic microstructures on macroscopic properties, such as Knoop hardness, has been challenging, especially in glass-ceramics with overlapping crystalline and glassy phases. To address this, two computational techniques, computer vision algorithm and machine learning with convolutional neural networks, were employed to predict Knoop hardness based on scanning electron microscopy images. The computer vision algorithm provides physical insights by extracting features from images, while the machine learning method allows for more accurate predictions but lacks transparency. The relative merits of the models are discussed.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Manish Badole, Hari Narayanan Vasavan, Samriddhi Saxena, Asish Kumar Das, Pratiksha Gami, Sunil Kumar
Summary: This study fabricated K0.5Bi0.5TiO3 ceramics with different grain morphologies and demonstrated the strong dependence of electrical properties on grain morphology. The ceramics with plate and rod-shaped grain morphologies exhibited enhanced piezoelectric performance and conductivity.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Physical
D. V. Louzguine-Luzgin, Yu. P. Ivanov, A. L. Greer
Summary: The crystallization behavior of a Cu58Y37Sc5 metallic glassy alloy was investigated using various methods. Differential scanning and isothermal calorimetries were performed to study the phase transformations. X-ray diffractometry studies showed the simultaneous formation of Cu2Y, CuY, and CuSc crystalline phases, indicating eutectic crystallization, while the isothermal crystallization kinetics corresponded to primary crystallization. Transmission electron microscopy observations revealed a complex crystallization process involving heterogeneous nucleation on pre-existing particles.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
A. D. Timoshenko, O. O. Matvienko, A. G. Doroshenko, S. Parkhomenko, I. O. Vorona, O. S. Kryzhanovska, N. A. Safronova, O. O. Vovk, V. N. Baumer, I Matolinova, S. Hau, C. Gheorghe, R. P. Yavetskiy
Summary: YAG:Sm3+ transparent ceramics with 3-15 at.% Sm3+ doping were prepared by solid-state reactive sintering. The effect of samarium ions concentration on the microstructure and optical properties of the ceramics was investigated. It was found that the solubility limit of samarium ions in the garnet matrix was within the range of 9-11 at.%. The absorption coefficients corresponding to Sm3+ ions transitions increased linearly with increasing Sm3+ doping, and the intensities of the satellites and the broadening of the main spectral lines also increased with the concentration of Sm3+ ions. Highly-doped YAG:Sm3+ ceramics with 9 at.% Sm3+ ions showed low optical losses at 808 nm and a high absorption coefficient at 1064 nm, making them suitable for suppressing parasitic oscillations in YAG:Nd3+ lasers at 1064 nm.
CERAMICS INTERNATIONAL
(2023)
Article
Nanoscience & Nanotechnology
Joao V. Campos, Isabela R. Lavagnini, Viviana Avila, Bola Yoon, Sanjit Ghose, Rishi Raj, Eliria M. J. A. Pallone, Lilian M. Jesus
Summary: This study investigates the Arrhenius behavior of electrical conductivity during flash sintering of 3 mol% yttria stabilized zirconia. Total conductivity was found to follow an Arrhenius-like equation in both dense and green samples, with non-linearity related to furnace temperature. A change in activation energy for conduction prior to the flash event was observed and discussed.
SCRIPTA MATERIALIA
(2021)
Article
Materials Science, Ceramics
T. S. Mansour, M. M. S. Wahsh, A. G. M. Othman
Summary: This study examines the impact of sintering temperature and nano boehmite additions on the phase composition, densification, and mechanical properties of porous cordierite ceramics. Sintering temperatures ranged from 1200 to 1400 degrees C. Carbon powder was used as a pore forming agent to increase ceramic porosity. The addition of nano boehmite and carbon significantly increased ceramic porosity and average pore size. The microstructure of the sintered samples showed that the crystallinity of the formed phases increased with increased nano boehmite additions.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2023)
Article
Materials Science, Ceramics
Jiajing Li, Qiang Xian, Zhen Li, Zhenyu Chen, Xuanrui Zhang, Qiaolin Chen, Hui Dan, Yi Ding, Tao Duan
Summary: A novel method using borosilicate glass as a sintering additive for synthesizing ZrSiO4 ceramics has been reported. The addition of borosilicate glass significantly affects the phase evolution and properties of the ceramics. The formation efficiency of ZrSiO4 phase was enhanced by increasing the content of borosilicate glass and sintering temperature.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
A. Pashchenko, N. A. Liedienov, Quanjun Li, I. I. Makoed, D. D. Tatarchuk, Y. Didenko, A. Gudimenko, V. P. Kladko, Lina Jiang, Liping Li, V. G. Pogrebnyak, G. G. Levchenko
Summary: Single-phase lanthanum-modified bismuth ferrite multiferroic ceramics were synthesized using the RLS method, with studies conducted on their phase composition, crystal structure, microstructure, and dielectric properties. The optimal conditions for achieving a perovskite Bi0.9La0.1FeO3 structure were determined, with compacting pressure shown to greatly impact the dielectric constant of the material. The use of the RLS method under varying compacting pressures offers new possibilities for creating multifunctional multiferroics with controlled magnetoelectric coupling.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Multidisciplinary Sciences
Suravi Islam, Nazia Khatun, Md. Shehan Habib, Syed Farid Uddin Farhad, Nazmul Islam Tanvir, Md. Aftab Ali Shaikh, Samia Tabassum, Dipa Islam, Md. Sajjad Hossain, Ayesha Siddika
Summary: In this study, Yttrium-doped Barium Titanate (Y-BT) perovskite ceramics were synthesized using the sol-gel method and their structural, electrical, and optical properties were investigated. The results showed that the crystallite size of Y-BT initially increased with Y-doping, but decreased with further increase in Y3+ concentration. The Yttrium doping enhanced the dielectric properties and optical band gap energy of the materials.
Article
Materials Science, Ceramics
Rob Atkin, Timothy B. Sercombe, Neda Ghaebi Panah
Summary: Bioactive glass scaffolds are commonly used in bone tissue engineering applications, and sintering is often employed to enhance their mechanical strength. However, sintering can lead to crystallization, resulting in reduced bioactivity and biodegradability. This study compared the in-vitro bioactivity and biodegradability of sintered 58S bioactive glass made from fully amorphous powder and partially crystalline powder with the same chemical compositions. The results showed that the sintered 58S produced from glass ceramic powder exhibited higher in-vitro bioactivity and biodegradability rate than that from fully amorphous powder. The initial structure after calcination was found to be crucial in determining the subsequent crystallization during sintering, and the presence of crystallinity and hydroxyapatite formation after calcination played important roles in increasing the bioactivity and biodegradability rate of the sintered 58S.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Karthikeyan Ramachandran, Zuccarini Carmine, Katsumi Yoshida, Toru Tsunoura, Doni Daniel Jayaseelan
Summary: Commercially available Ti3SiC2 and Ti2AlC ceramics were investigated for their wet corrosion and mechanical behavior, with Ti2AlC showing higher oxidation resistance and formation of protective layers, while Ti3SiC2 exhibited decreased bending strength but higher tensile strength under hydrothermal conditions. Finite element analysis was used to validate the tensile strength results, and mathematical models were employed to study and compare the oxidation thickness for the ceramics. The models effectively validated the experimental results, showing the potential for predicting oxidation behavior in Ti3SiC2 ceramics.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Physics, Applied
Yong Yan, Jie Li, Hengyi Li, Shasha Li, Zhongwei Li, Wei Gao, Yurong Jiang, Xiaohui Song, Congxin Xia, Jingbo Li
Summary: In this study, a high-performance self-powered broadband photodetector was fabricated based on a near-broken-gap GeSe/SnS2/InSe heterostructure. The device exhibited ultrahigh open-circuit voltage, high power-dependent responsivity, and fast response time in the self-powered mode. By utilizing the near-broken band alignment and the high electron mobility of InSe layer, the conversion efficiency of the device was improved. The unipolar hole barrier at the interface also inhibited the Langevin recombination, leading to the enhancement of open-circuit voltage. This work provides an opportunity for the realization of high-sensitivity polarization-sensitive broadband photodetectors.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Baoxiang Yang, Wei Gao, Hengyi Li, Peng Gao, Mengmeng Yang, Yuan Pan, Chuanglei Wang, Yani Yang, Nengjie Huo, Zhaoqiang Zheng, Jingbo Li
Summary: This study presents a P-N photodiode based on 3D Ge/2D gamma-InSe van der Waals heterojunction, which exhibits excellent photovoltaic performance and detects double photocurrent peaks in the wavelength range of 400 to 1600 nm. Additionally, the device achieves polarization-sensitive light detection and high-resolution single-pixel imaging capability.
Article
Chemistry, Multidisciplinary
Zhongtong Luo, Huakai Xu, Wei Gao, Mengmeng Yang, Yan He, Zihao Huang, Jiandong Yao, Menglong Zhang, Huafeng Dong, Yu Zhao, Zhaoqiang Zheng, Jingbo Li
Summary: Next-generation imaging systems require photodetectors with high sensitivity, polarization sensitivity, miniaturization, and integration. Emerging 2D materials offer innovative avenues to meet these requirements, but their current performance is still below the practical application needs. In this study, a tunneling dominant imaging photodetector based on WS2/Te heterostructure is reported, which shows competitive performance and promising application prospects in future imaging systems.
Article
Nanoscience & Nanotechnology
Zhiying Dan, Baoxiang Yang, Qiqi Song, Jianru Chen, Hengyi Li, Wei Gao, Le Huang, Menglong Zhang, Mengmeng Yang, Zhaoqiang Zheng, Nengjie Huo, Lixiang Han, Jingbo Li
Summary: In recent years, the development of 2D nonlayered Bi2O2Se-based electronics and optoelectronics has attracted great attention due to their high electron mobility, stability, and narrow band gaps. However, conventional Bi2O2Se-based photodetectors suffer from issues such as high dark current, slow response speed, and persistent photoconductivity effect, limiting their applications in fast-response imaging sensors and low-power broadband detection. In this study, a Bi2O2Se/2H-MoTe2 van der Waals heterostructure is reported, which shows improved performance in terms of responsivity, detectivity, and conversion efficiency. The proposed heterostructure is considered a promising candidate for integrated circuits, image sensors, and low-power detection.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Zecheng Chen, Jianming Huang, Mengmeng Yang, Xiao Liu, Zhaoqiang Zheng, Nengjie Huo, Lixiang Han, Dongxiang Luo, Jingbo Li, Wei Gao
Summary: In recent years, polarization-sensitive photodiodes based on 1D/2D van der Waals (vdWs) heterostructures have gained attention due to their high specific surface area and large photo-active area. A study successfully synthesized 1D Bi2O2Se nanowires through chemical vapor deposition. The resulting photodiode showed excellent optoelectrical performances, including high responsivities and fast response speed.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Tao Zheng, Mengmeng Yang, Yuan Pan, Zhaoqiang Zheng, Yiming Sun, Ling Li, Nengjie Huo, Dongxiang Luo, Wei Gao, Jingbo Li
Summary: In this work, we present a high-efficiency and polarization-sensitive photodetector based on two-dimensional (2D) WSe2/Ta2NiSe5/WSe2 van der Waals (vdW) dual heterojunctions (DHJ) and a sandwich-like electrode pair. The DHJ device exhibits a broadband spectral response of 400-1550 nm and remarkable performance including an ultrahigh external quantum efficiency (EQE) of 85.5%, a pronounced power conversion efficiency (PCE) of 1.9%, and a fast response speed of 420/640 μs under 635 nm light illumination. Moreover, the DHJ device demonstrates competitive polarization sensitivities of 13.9 and 14.8 under 635 nm and 808 nm light, respectively, based on the strong in-plane anisotropy of 2D Ta2NiSe5 nanosheets. Additionally, the DHJ device shows excellent self-powered visible imaging capability. These results provide a promising platform for realizing self-powered photodetectors with high performance and multifunctionality.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Physics, Applied
Sina Li, Jielian Zhang, Yan Li, Kai Zhang, Lingyu Zhu, Wei Gao, Jingbo Li, Nengjie Huo
Summary: Researchers have designed a vdW heterojunction device using low-symmetric CrOCl, which exhibits stable anti-ambipolar behavior and polarization-sensitive photodetection. The anti-ambipolar transport behavior in a MoTe2 channel is observed due to the gate-tunable band bending and charge transfer at the MoTe2/CrOCl interface. The device shows good photodetection performance with a responsivity of 1.05 A/W and a temporal response of 970 μs. With the anisotropic CrOCl as a photosensitizing layer, the device achieves polarization-sensitive photodetection with a photocurrent dichroic ratio of up to 6. This work provides a valid device model and design strategy for versatile optoelectronics, including anti-ambipolar transistors and polarimetric photodetectors.
APPLIED PHYSICS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Hengyi Li, Jianming Huang, Peng Gao, Baoxiang Yang, Zhibin Lan, Wei Gao, Feng Zhang, Mengmeng Yang, Zhaoqiang Zheng, Nengjie Huo, Jingbo Li
Summary: Herein, a graphite/WTe2/Ge mixed-dimensional van der Waals heterojunction-based Schottky photodetector (PD) is reported for self-powered near-infrared detection. The device responds to a wide spectrum of 400-2200 nm with a peak wavelength at 1550 nm and exhibits remarkable photovoltaic characteristics. It shows great potential in the field of ultrafast near-infrared detection and high-resolution imaging.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Chemistry, Physical
Zihao Huang, Zhongtong Luo, Ziwen Deng, Mengmeng Yang, Wei Gao, Jiandong Yao, Yu Zhao, Huafeng Dong, Zhaoqiang Zheng, Jingbo Li
Summary: With the rapid development of two-dimensional semiconductor technology, a serious problem of chemical disorder at metal-semiconductor interface has arisen. By using topological Bi2Se3 as electrodes, defect-free van der Waals contacts are achieved, significantly improving the performance of 2D semiconductor optoelectronic devices. The results demonstrate high responsivity, excellent detectivity, and fast rise/decay time, as well as high-resolution visible-light imaging capability, opening up new possibilities for high-performance electronics and optoelectronics.
Article
Nanoscience & Nanotechnology
Zhiyang Zhang, Lixiang Han, Zhiying Dan, Hengyi Li, Mengmeng Yang, Yiming Sun, Zhaoqiang Zheng, Nengjie Huo, Dongxiang Luo, Wei Gao, Jingbo Li
Summary: Bi2O2Se nanosheets, a ternary non-van der Waals 2D material, have attracted significant research attention due to their stability, bandgap, mobility, and properties. However, their high dark current and low light on/off ratio hinder their application in low-energy-consuming optoelectronics. In this study, a homotype van der Waals heterostructure based on n-InSe and n-Bi2O2Se nanosheets was fabricated, demonstrating excellent self-driven photodetection in the range 400-1064 nm with high responsivity and detectivity. The study suggests potential applications of this heterojunction in next-generation broadband photodetectors.
ACS APPLIED NANO MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yingying Niu, Xin Zhou, Wei Gao, Maixia Fu, Yule Duan, Jiandong Yao, Bing Wang, Mengmeng Yang, Zhaoqiang Zheng, Jingbo Li
Summary: Driven by the rapid development of autonomous vehicles, ultrasensitive photodetectors with high signal-to-noise ratio and ultraweak light detection capability are urgently needed. However, the lack of an effective photoconductive gain mechanism in individual indium selenide (In2Se3) inhibits its further application. To address this issue, a heterostructure photodetector is proposed, consisting of an In2Se3 photoactive channel, a hexagonal boron nitride (h-BN) passivation layer, and a CsPb(Br/I)(3) quantum dot gain layer. This device demonstrates excellent performance characteristics and has potential applications in autonomous vehicles.
Article
Optics
Yu Wang, Chuankai Liu, Hao Qian, Hangzan Liu, Lixiang Han, Xiaozhou Wang, Wei Gao, Jingbo Li
Summary: This study proposes a p-n junction-coupled MIS normally-off HEMT UVPD with excellent light triggering performance and fast response speed, demonstrating good stability and suitability for applications in UV communication and space exploration.
Article
Nanoscience & Nanotechnology
Jingyi Ma, Jina Wang, Quan Chen, Shengdi Chen, Mengmeng Yang, Yiming Sun, Zhaoqiang Zheng, Nengjie Huo, Yong Yan, Jingbo Li, Wei Gao
Summary: This study reports a vertically stacked multilayered WS2/WTe2 Schottky phototransistor with reconfigurable rectification ratio and adjustable responsivity. The device also demonstrates nonvolatile photovoltaic performance. This research is of great significance for the development of reconfigurable optoelectronic devices.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Ying Huang, He Yu, Wei Gao, Peiting Wen, Zihao Liu, Hanyu Wang, Menglong Zhang, Jingbo Li
Summary: A multilayered PtTe2/2H-MoTe2-based 2D/2D Schottky phototransistor is demonstrated, showing a rectification ratio of up to 2 x 10(3) and functioning as a photodiode at zero/negative bias and a phototransistor at forward bias. The device exhibits a high photovoltaic responsivity of 1.6 A W-1, a specific detectivity of 6.1 x 10(12) Jones, and a response time of fewer than 22 μs. Single-pixel imaging measurements confirm its outstanding detection capability at zero/negative bias conditions.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Jianming Huang, Kaixiang Shu, Nabuqi Bu, Yong Yan, Tao Zheng, Mengmeng Yang, Zhaoqiang Zheng, Nengjie Huo, Jingbo Li, Wei Gao
Summary: In this study, a PtSe2/WSe2/Au asymmetric Schottky photodiode was successfully fabricated, demonstrating gate-tunable rectifying behavior and high photoresponsivity. Furthermore, the scanning photocurrent mapping revealed that the photocurrent was primarily distributed at the edge of the interface, confirming the asymmetric Schottky structure.
SCIENCE CHINA-MATERIALS
(2023)
Article
Polymer Science
Tetsu Sato, Mariko Takahashi, Takeshi Saito, Masahito Toyonaga, Itsuo Tanuma, Rie Yamada, Satoru Hosoda
Summary: An automatic evaluation system for photooxidation has been developed and successfully applied to assess the photo-OIT of LDPE samples containing photooxidation stabilizers. The system allows independent setting of various measurement conditions and provides detailed information on the photooxidation process.
POLYMER DEGRADATION AND STABILITY
(2024)
Article
Polymer Science
Zongzheng Zuo, Shuxue Zhou
Summary: In this study, three fluoroalkyl trimethoxysilane (FATMS) additives with different chain lengths were incorporated into a two-component polyurethane clearcoat to improve its hydrophobic durability. The coatings modified with FATMS maintained their surface hydrophobicity under various conditions, but quickly lost it when exposed to both UV irradiation and/or high temperature with water. The results suggest that the FATMS route is more suitable for indoor applications at room temperature.
POLYMER DEGRADATION AND STABILITY
(2024)
Article
Polymer Science
Song Li, Feng Zhao, Xueya Wang, Zhihua Liu, Jingze Guo, Yutong Li, Shuangmei Tan, Zhenxiang Xin, Shuai Zhao, Lin Li
Summary: Green flame retardants have garnered attention for their environmental friendliness, but current options fall short in achieving high flame retardancy for flammable polymers and maintaining environmental protection. This study takes a two-pronged approach to address flame retardants and the flame-retardant process. An eco-friendly bio-based synergistic flame retardant (PAU), synthesized using phytic acid (PA) and urea (U), is used to create a flame retardant coating that can be directly applied to any surface shape using polydopamine as an adhesive. The resulting EPS-PAU exhibits excellent flame retardancy, smoke suppression, and light weight while only slightly increasing the density.
POLYMER DEGRADATION AND STABILITY
(2024)
