Article
Materials Science, Multidisciplinary
Jinchun Jiang, Yujie Guo, Xiaoliang Weng, Fangchao Long, Yun Xin, Yangfan Lu, Zhizhen Ye, Shuangchen Ruan, Yu-Jia Zeng
Summary: This study demonstrates that the Sb2Se3/ZnO photodetector has great potential for use in bipolar signal communications in wireless, filterless, and wearable optoelectronic systems. It also lays the groundwork for designing and optimizing flexible dual-polarity photodetectors from arbitrary hetero-assemblies.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Engineering, Electrical & Electronic
Jiang Li, Rui Wang, Zhaowen Bai, Gang Wang, Xinmiao Zhang, Junsheng Yuan, Jinyuan Zhou, Erqing Xie, Xiaojun Pan
Summary: In this study, photoelectrochemical (PEC) type ultraviolet photodetectors (UVPDs) based on KNbO3/ZnO heterojunctions were fabricated and found to possess excellent performance and appropriate band structures for UV radiation monitoring. Compared to PEC UVPDs based on pure ZnO and KNbO3, the developed PEC UVPDs based on KNbO3/ZnO showed higher performances with a responsivity of 0.1 A/W, rise and decay times of 8 ms and 11 ms, and a linear wavelength response from 320 to 400 nm. These results highlight the high sensitivity, responsivity, and rapid response of the PEC UVPDs based on KNbO3/ZnO heterojunctions, suggesting their great potential for UV detection.
SENSORS AND ACTUATORS A-PHYSICAL
(2023)
Article
Chemistry, Multidisciplinary
Kai Tang, Mingming Jiang, Bingwang Yang, Tong Xu, Zeng Liu, Peng Wan, Caixia Kan, Daning Shi
Summary: This study presents a homojunction ultraviolet photodetector by using p-type Sb-doped ZnO microwire and n-type ZnO layer. By engineering the band alignment of the p-ZnO:Sb/n-ZnO homojunction, the optimized photodetector shows enhanced ultraviolet detection capabilities with a light on/off ratio of 1.6 x 10(8), responsivity over 267 mA W-1, and specific detectivity of approximately 1.2 x 10(14) Jones. This research not only synthesizes stable p-type ZnO, but also provides substantial opportunities for developing high-performance ZnO homojunction optoelectronic devices.
Review
Materials Science, Multidisciplinary
Vinod Panwar, Sukanta Nandi, Mandira Majumder, Abha Misra
Summary: This article discusses the efforts to develop self-powered photodetectors (PDs) using ZnO-based heterointerfaces for an improved pyro-phototronic effect. It focuses on the pyro-phototronic effect, exploring ZnO-based materials, doped ZnO-based materials, and ZnO-based materials with the plasmonic effect. The article concludes with a discussion on the challenges in the state-of-the-art technology and possible directions for future research.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
K. K. Supin, Parvathy P. M. Namboothiri, M. Vasundhara
Summary: The present study focuses on the green synthesis of zinc oxide nanoparticles using a novel leaf extract and the photocatalytic degradation of a dye. The analysis of the synthesized nanoparticles was conducted using various techniques. The study also investigated the crystallinity and crystallite size of the nanoparticles and evaluated their photocatalytic activity for dye degradation. The results showed high efficiency and potential for wastewater treatment.
Article
Chemistry, Multidisciplinary
Shamim Ahmmed, Asma Aktar, Abu Bakar Md Ismail
Summary: A heterostructure of CuO-ZnO-based solar cells was fabricated using a low-cost, low-temperature spin coating technique, with the introduction of a V2O5 HTL to improve efficiency. Experimental results showed that V2O5 could significantly enhance the photovoltaic parameters of CuO-ZnO-based solar cells.
Article
Polymer Science
Muhammad Alamgeer, Muhammad R. Tahir, Mahidur Sarker, Shabina Ali, Shahid Hussian, Sajad Ali, Muhammad Imran Khan, Dil Nawaz Khan, Rashid Ali, Suhana Mohd Said
Summary: The combination of polyaniline (PANI) and zinc oxide (ZnO) nanoparticles in different ratios was used to prepare PANI/ZnO nanocomposites, which significantly improved the performance of polymer-based photovoltaic devices. The nanocomposites were characterized using various techniques, such as X-ray diffraction (XRD), scanning electron microscopy (SEM), atomic force microscopy (AFM), Fourier transform infrared (FTIR) spectroscopy, UV-vis absorption, energy dispersive X-ray (EDX), and I-V measurements. The results showed that the PANI/ZnO nanocomposites exhibited enhanced optical and electrical properties, with a high power conversion efficiency (PCE) of 4.48% achieved for the PANI/ZnO (3 wt%) nanocomposites.
Article
Engineering, Electrical & Electronic
O. Ozturk, B. M. Candan, S. Kurnaz, O. Cicek, A. T. Tasci
Summary: ZnO nanorod/ZnO thin film structures synthesized using a hydrothermal method exhibit unique solar sensing characteristics. Samples grown for 2 and 3 hours in a 10 mM solution performed the best.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Anu Katiyar, Nishant Kumar, R. K. Shukla, Anchal Srivastava
Summary: ZnO nanorods are grown along the c-axis using a sonicated sol-gel immersion method at a lower temperature, where the seed-layer precursor molarity and immersion time significantly impact the structural and morphological properties of the nanorods. These hexagonal nanorods exhibit green emission and persistent photoconductivity, which can be partially quenched through annealing. Annealing also helps improve transmittance and tunes the band gap value of bulk ZnO.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2021)
Article
Materials Science, Multidisciplinary
N. B. Leonov, M. D. Komissarov, P. S. Parfenov, T. A. Vartanyan, V. A. Polishchuk, V. V. Tomaev, A. Koroleva, E. Zhizhin
Summary: The optical absorbance spectra of oxide films do not change with different oxidation temperatures, except at 770°C. XPS analysis revealed the presence of oxygen vacancies at oxidation temperatures higher than 600°C, which are responsible for the visible luminescence at 500nm.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Engineering, Electrical & Electronic
Hang Wang, He Wang, Lihua Li, Yongjun Gu, Bok-Hee Kim, Jinliang Huang
Summary: A new bottlebrush nanostructure based on the Co3O4-ZnO PN junction has been fabricated as a highly efficient broadband photodetector capable of operation under zero bias conditions. It shows a reasonable band structure, improved light absorption efficiency, and reduced electron-hole recombination, and exhibits highly efficient detection performance in the UV-visible region. The responsivity, specific detectivity, and response speed of the device are 22.7 mA W-1, 3.14 x 10(12) Jones, and 20/90 ms, respectively.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Optics
Edgar Mosquera, Jesus E. Diosa
Summary: Zn1-xMgxO phosphors were successfully synthesized via solid-state chemical reaction method, and their structural and optical properties were investigated. The study found that as the magnesium content increases, the absorption edge shifts to shorter wavelengths, and the emission intensity decreases, showing potential for applications in ultraviolet light emitting devices.
Article
Chemistry, Multidisciplinary
Sauvik Chatterjee, Piyali Bhanja, Dibyendu Ghosh, Praveen Kumar, Sabuj Kanti Das, Sasanka Dalapati, Asim Bhaumik
Summary: Utilizing N-rich antidiabetic drug metformin as a template, a new crystalline triclinic phase of ZnO has been successfully synthesized via hydrothermal synthesis with self-assembled nanorod-like particle morphology. By coupling porous ZnO with a covalent organic framework, a heterojunction nanocomposite charge carrier photoanode has been fabricated, achieving highly enhanced photocurrent density and excellent photon-to-current conversion efficiency in photoelectrochemical water oxidation. The enhanced photocurrent for the porous ZnO/COF nanocomposite material over the corresponding bulk ZnO is attributed to the visible light energy absorption by COF and efficient charge-carrier mobility via porous ZnO surface.
Article
Spectroscopy
K. Saravanakumar, P. Sakthivel, R. K. Sankaranarayanan
Summary: Research on synthesizing ZnO nanoparticles doped with Sn4+ ions reveals structural, optical, and dielectric properties of the materials. Results show that the doping of Sn4+ induces a blue shift in the optical band gap, reduces particle size, with the reduction rate increasing for higher doping ratios.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2022)
Article
Multidisciplinary Sciences
D. J. Sanchez-Trujillo, L. V. Osorio-Maldonado, J. J. Prias-Barragan
Summary: The electrical conductivity of graphene oxide films was studied and found to increase with temperature, exhibiting semiconductor-like behavior. This study provides a foundation for the development of graphene oxide films with high conductivity.
SCIENTIFIC REPORTS
(2023)
Article
Nanoscience & Nanotechnology
Jiawen Chen, Huili Tang, Bo Liu, Zhichao Zhu, Mu Gu, Zengxing Zhang, Qiang Xu, Jun Xu, Leidang Zhou, Liang Chen, Xiaoping Ouyang
Summary: X-ray detection is crucial in various fields, and the beta-Ga2O3 single-crystal-based detector has gained attention for its excellent properties. However, challenges remain in developing high-performance detectors due to dark current and oxygen vacancy concentration issues. This study presents a promising method using Mg-doped beta-Ga2O3 crystals to achieve high sensitivity and improved response speed in X-ray detection.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Qiang Xu, Chen Li, Jing Nie, Yong Guo, Xiang Wang, Bohao Zhang, Xiaoping Ouyang
Summary: Lead halide perovskite single crystals have been successfully used for X-ray detection, but poor air stability and ionic migration have led to device degradation. A solution-processed lead 0D bulk Cs4PbI6 single crystal with high sensitivity has demonstrated great potential for practical X-ray detection applications, showing excellent air stability and long-term sensitivity retention.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Optics
Qiang Xu, Juan Wang, Qindong Zhang, Xiao Ouyang, Maheng Ye, Weiting Xie, Xuewen Yan, Deyuan Li, Xiaoping Ouyang, Xiaobing Tang, Xiaodong Zhang
Summary: A novel solution-processed Cs3Cu2I5 single crystal scintillator with outstanding stability and radiation hardness is reported, providing a low-cost option with detection performance comparable to commercial products for gamma-ray detection.
PHOTONICS RESEARCH
(2021)
Article
Engineering, Electrical & Electronic
Qiang Xu, Yong Guo, Chen Li, Xiang Wang, Yang Li, Bohao Zhang, Xiaoping Ouyang
Summary: The study presents a high spatial resolution scintillation screen with a vertical ZnO nanowires structure that converts X-ray to UV-visible light. The well-distributed nanowires grown by the hydrothermal method act as a light guide to suppress lateral spreading, achieving sharp X-ray digital images. The best spatial resolution of 9.8 lp/mm was achieved for 2 μm thick ZnO nanowires under a 30 keV monoenergetic X-ray beam, demonstrating the potential of solution-growth vertical ZnO nanowires scintillation screen in providing high X-ray image quality with high resolution.
IEEE PHOTONICS TECHNOLOGY LETTERS
(2021)
Article
Nanoscience & Nanotechnology
Qiang Xu, Jie Huang, Jun Liu, Juan Wang, Shuai Zhou, Xiang Wang, Jing Nie, Yong Guo, Xiaoping Ouyang
Summary: The study investigates the scintillation performances of lead halide perovskite QDs solution, which exhibit characteristics such as linear relationship with irradiation dose rate, high radiation hardness, and fast counting speed. This provides promising potential applications for indirect radiation applications including fast gamma-ray counter and wide range dosimeter.
Article
Chemistry, Physical
Qiang Xu, Bohao Zhang, Jing Nie, Hang Zhang, Xiaoping Ouyang, Jun Liu, Yang Liu
Summary: This study reports a self-powered X-ray detector with schottky structure fabricated using organic-inorganic perovskite CH3NH3PbBr3 single crystals grown on ITO glass, showing sensitivity to X-ray photons without external bias. The achieved X-ray sensitivity is up to 2.35 x 10(-4) mu C mu Gy(-1)cm(-2) under 35 kV X-ray exposure without bias, demonstrating energy-saving X-ray detection capability of perovskite-based schottky diodes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Yang Li, Liang Chen, Runlong Gao, Bo Liu, Wei Zheng, Yanming Zhu, Jinlu Ruan, Xiaoping Ouyang, Qiang Xu
Summary: Cs4PbI6 single crystals demonstrate high sensitivity to low-energy X-rays, favorable linearity detection range, and a light yield of about 49.5% of a BGO scintillator under Np-237 alpha particle irradiation with an energy resolution of 35% at 4.78 MeV. These results highlight the potential of Cs4PbI6 SCs as a nanosecond and low-cost scintillator in radiation detection applications.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Materials Science, Ceramics
Yang Li, Liang Chen, Bo Liu, Jinlu Ruan, Jinliang Liu, Xiaoping Ouyang, Qiang Xu
Summary: In this study, undoped Cs4PbBr6 single crystals exhibited ultralong phosphorescence emission at low temperatures. The ultralong phosphorescence emission originates from defect-related emission. This finding opens up potential revolutionary applications.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Yang Li, Liang Chen, Xiaoping Ouyang, Kuo Zhao, Qiang Xu
Summary: This study investigates the X-ray scintillation properties of all-inorganic Cs4PbI6 single crystals (SCs) in the temperature range of 50-290 K. The temperature-dependent radioluminescence (RL) spectrum and decay time are analyzed. The results show that the RL spectra exhibit significant temperature-dependent changes in shape, and the RL intensity increases as the temperature decreases under X-ray excitation. The Cs4PbI6SCs demonstrate faster decay times at lower temperatures, indicating their potential for cryogenic detection.
INORGANIC CHEMISTRY
(2022)
Article
Nanoscience & Nanotechnology
Bing Wang, Pei Li, Yifan Zhou, Zhiliang Deng, Xiaoping Ouyang, Qiang Xu
Summary: Lead-free perovskite nanoparticles capable of emitting self-trapped excitons were prepared and used to fabricate large-scale scintillation screens with high photo-luminescence quantum yield and spatial resolution. The screens showed excellent linear response to X-ray dose rate and low detection limit, as well as remarkable radiation-resistant hardness even under continuous X-ray irradiation for 120 minutes.
ACS APPLIED NANO MATERIALS
(2022)
Article
Instruments & Instrumentation
WanFu Wang, Bing Wang, Qiang Xu
Summary: Organometal halide perovskites are potential materials for X-ray detection due to their great properties and low cost. However, ion migration is a major obstacle for their application, especially migration via surface which degrades device performances. This paper demonstrates that a KCl passivation layer can effectively passivate surface traps and improve electrical performance of MAPbI(3) devices.
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
(2022)
Article
Chemistry, Multidisciplinary
Pei Li, Wei Cheng, Yifan Zhou, Dong Zhao, Jun Liu, Lingxi Li, Xiaoping Ouyang, Bo Liu, Wenbao Jia, Qiang Xu, Kostya (Ken) Ostrikov
Summary: State-of-the-art thermal neutron scintillation detectors currently rely on rare isotopes for neutron capture and have limitations in stability, scalability, and discrimination between neutron and gamma rays. However, the boron nitride (BN)-CsPbBr3 perovskite nanocomposite aerogel scintillator offers discriminative detection of thermal neutrons, with a large size (9 cm), low density (0.17 g cm(-3)), high BN (50%) and perovskite (1%) contents, high optical transparency (85%), and excellent radiation stability. The novel detection mechanism utilizes thermal neutron capture and effective energy transfer between densely packed BN and CsPbBr3 nanocrystals, allowing for discrimination between neutrons and gamma rays.
ADVANCED MATERIALS
(2023)
Article
Engineering, Environmental
Qiang Xu, Amlan Datta, Krys Becla, Piotr Becla, Shariar Motakef
Summary: A continuous solution growth method has been developed to produce large, high-quality perovskite single crystals with excellent photodetection and ionization radiation detection capabilities.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Yang-Peng Lin, Sanlue Hu, Jiahao Xu, Zhizhuang Zhang, Xinghui Qi, Xuexia Lu, Jiance Jin, Xiao-Ying Huang, Qiang Xu, Zhonghua Deng, Zewen Xiao, Ke-Zhao Du
Summary: Zero-dimensional (0D) metal halides based on environmental friendliness, low cost, and earth-abundant elements have gained attention for various applications. In this study, Mn-doped 0D C4H12N2ZnX4 (X = Cl and Br) with strong green emission was developed for scintillator and white light-emitting diode (WLED) applications. Mn doping effect on the electronic structure of C4H12N2ZnX4 was investigated using spectroscopic studies and density functional theory (DFT) calculations. The results showed that Mn doping reduced the bandgap and enhanced the Mn d-d emission, resulting in high photoluminescence quantum yield (PLQY) and luminous efficacy in Mn-doped C4H12N2ZnX4-based WLEDs.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Engineering, Environmental
Yifan Zhou, Zhiliang Deng, Bing Wang, Pei Li, Lingxi Li, Wenmin Han, Jie Huang, Wenbao Jia, Xiaoping Ouyang, Qiang Xu, Kostya (Ken) Ostrikov
Summary: Traditional nanocrystalline scintillators have limitations in high-energy X-ray imaging due to lateral radiation spreading. This study resolves the issue by embedding CsPbBr3 crystals into nanofiber structures, offering excellent X-ray detection performance and linear response range.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
