Article
Chemistry, Inorganic & Nuclear
Junyu Ming, Yaxiong Wang, Shaokun Ling, Sen Liao, Yingheng Huang, Huaxin Zhang
Summary: A red emitting phosphor KGdF4:0.20Eu(3+),0.06 Tb3+ was prepared by hydrothermal method, which exhibits high stability and negative thermal quenching for application in UV-excited WLEDs. The co-doping of Tb3+ enhances emission intensity of Eu3+ and increases negative thermal quenching.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Muzhi Cai, Laurent Calvez, Jean Rocherulle, Pierre-antoine Bouit, Muriel Hissler, Hongli Ma, Claire Roiland, Vincent Dorcet, Junjie Zhang, Shiqing Xu, Xianghua Zhang
Summary: LEC is an easily fabricated electroluminescent device with poor operational stability, mainly due to the poor thermal stability of the electrolyte. This study explores the use of inorganic glass electrolyte for LEC application, successfully synthesizing a hybrid glass with organic fluorophore dopants and promising optical and electrochemical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Z. Msetra, N. Khitouni, J. J. Sunol, M. Khitouni, M. Chemingui
Summary: An amorphous Co60Fe18Ta8B14 powdered alloy was successfully prepared by mechanical alloying, with XRD and SEM confirming its characteristics and unique crystallization process and properties.
Article
Chemistry, Physical
Rakhy Raphael, E. Anila
Summary: Thin films of Ce-doped Ga2O3 were deposited with different doping concentrations, with analysis of structural characteristics, band gap, photoluminescence, and concentration quenching effect. The study provides insights into the properties and behaviors of the doped Ga2O3 films.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Xia Li, Yihao Wang, Lu Wang, Mingqin Xu, Jiaojiao Yi
Summary: The thermal stability of a composition Zr60Co27Al13 was analyzed under both a monolithic amorphous state and symbiotic primary crystal-glass state. It was found that the symbiotic metallic glass is more stable than the monolithic metallic glass due to the consumption of short-range order clusters, relaxation in atomic dimensions, and more homogenous elemental distribution in the residual amorphous regions. This research may contribute to the development of metallic glasses with higher thermal stability.
Article
Thermodynamics
Paul Hurley, Juliana Pacheco Duarte
Summary: The use of optical fiber temperature sensors to measure the temperature changes in fuel rod simulators during quenching allows for a more in-depth study of factors influencing the quenching process, such as cladding material, liquid subcooling, and surface roughness.
APPLIED THERMAL ENGINEERING
(2021)
Article
Chemistry, Multidisciplinary
Xinyang Shi, Muhua Zhang, Xinyue Lu, Qinan Mao, Lang Pei, Hua Yu, Jian Zhang, Meijiao Liu, Jiasong Zhong
Summary: In this work, an efficient dual-emitting center optical thermometry based on Ca2Sb2O7:Bi3+, Eu3+ phosphor is designed and prepared. By modulating the ratio of Bi3+/Eu3+, the multicolor changes from blue to pink are realized. The fluorescence intensity ratio of Eu3+ to Bi3+ in Ca2Sb2O7 samples demonstrates excellent optical thermometry performance, with maximum absolute sensitivity (Sa) and relative sensitivity (Sr) reaching as high as 0.2773 K-1 and 2.37% K-1, respectively. The as-prepared phosphor materials also exhibit outstanding repeatability and reversibility, showing great potential in the field of non-contact optical temperature thermometry and thermochromic.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Materials Science, Ceramics
Huabo Gao, Maxim S. Molokeev, Qi Chen, Xin Min, Bin Ma
Summary: Eu3+-doped AMoO4 (A = Ca and Ba) phosphors were successfully synthesized and their crystal structures, optical performance, and temperature measurement sensitivities were investigated. The peak doping concentration of CaMoO4:Eu3+ phosphor was 0.18, while the peak doping concentration of BaMoO4:Eu3+ phosphor may be greater than 0.18. The temperature-dependent photoluminescence emission spectra of representative CaMoO4:0.09Eu3+ and BaMoO4:0.03Eu3+ phosphors were recorded. CaMoO4:0.09Eu3+ phosphor exhibited abnormal thermal quenching and good thermal stability.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
R. M. T. Araujo, K. D. Machado, M. C. Siqueira, S. F. Stolf, C. M. Oliveira
Summary: The structural and optical properties of an amorphous SnSe9 alloy made using mechanical alloying were investigated. The results showed that the structure of SnSe9 is very different from crystalline Sn-Se alloys, and it has a large optical gap.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Chemistry, Multidisciplinary
Yu-Tian Zhang, Yun-Peng Wang, Xianli Zhang, Yu-Yang Zhang, Shixuan Du, Sokrates T. Pantelides
Summary: This paper addresses the question of the structure of single-atom-thick amorphous monolayers, and finds that the structure of elemental amorphous graphene and binary monolayer amorphous BN is different from previously debated options. The implications for other nonelemental 2D and bulk amorphous materials are also discussed.
Article
Chemistry, Multidisciplinary
Martin Haehsler, Hajnalka Nadasi, Martin Feneberg, Sebastian Marino, Frank Giesselmann, Silke Behrens, Alexey Eremin
Summary: Self-assembly is a crucial mechanism for designing multifunctional materials, especially in soft hybrid materials where components of different natures interact to form structures with specific functions. A novel magnetic hybrid material was demonstrated, showing the manipulation of molecular tilt through a delicate balance between topologically-assisted colloidal self-assembly of magnetic nanoparticles and anisotropic molecular interactions in a liquid crystal matrix.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Shan Zhang, Chao Wei, Jingwang Lv, Haoran Zhang, Zhilin Shi, Xinyu Zhang, Mingzhen Ma
Summary: The crystallization kinetics of Zr50Cu34Al8Ag8 bulk metallic glass under non-isothermal conditions was studied using differential scanning calorimetry. The activation energies were calculated and the crystallization mechanism was explored, revealing that the crystallization is mainly governed by diffusion-controlled three-dimensional growth.
Article
Crystallography
Hussain Sami, Osama Younis, Yui Maruoka, Kenta Yamaguchi, Kumar Siddhant, Kyohei Hisano, Osamu Tsutsumi
Summary: The study designed new liquid-crystalline luminescent materials by altering the chain length to affect the crystal structure and subsequently the luminescent properties. The observation of thermal enhancement of luminescence in the isotropic phase at high temperatures suggests dissociation of nonemissive aggregates formed in crystals.
Review
Nanoscience & Nanotechnology
Sen Chen, Zhongshan Deng, Jing Liu
Summary: Conventional thermal interface materials are limited by low thermal conductivity, while liquid metal based TIMs offer a promising alternative with superior thermal conductivity and conductivity. This review systematically interprets the basic features of LM-TIMs, summarizes representative explorations and progress, and illustrates typical approaches towards high performance LM-TIMs enhanced by nanotechnology. The perspective and challenges of this new generation thermal management material are outlined to guide future research in the field.
Article
Chemistry, Inorganic & Nuclear
Shaokun Ling, Jie Liang, Yifeng Yan, Chaolian Luo, Sen Liao, Yingheng Huang
Summary: A new type of zero thermal quenching effect has been discovered in red-emitting phosphors, leading to high luminescent thermal stability. The integrated emission intensity nonlinearly increases with temperature, indicating the potential application of these phosphors in high-brightness lighting.
JOURNAL OF SOLID STATE CHEMISTRY
(2022)
Article
Chemistry, Physical
Khaled M. Chahrour, Poh Choon Ooi, A. M. Eid, Ahmed Abdel Nazeer, Metwally Madkour, Chang Fu Dee, M. F. Mohd Razip Wee, Azrul Azlan Hamzah
Summary: The introduction of crystalline phase change and Ti3+ self-doping improved the electronic conductivity and photoelectrochemical activity of anodic TiO2 nanotubes, enhancing the detection efficiency and selectivity of photoelectrochemical sensors.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Shaikh Muhammad Jahanzaib, Abdul O. Jalil, Samson Aisida, Zhao Tingkai, Chang-Fu Dee, Michael Sorokin, Ishaq Ahmad, Anwar Ul-Hamid
Summary: The radiation-induced damage in graphene irradiated with 8-MeV Cu2+ ions at varying fluences was studied, showing an increase in point defects with ion fluence. The metallic nature of graphene was observed to transform into semiconducting at a critical stage, leading to a total conversion of the structure into a massively disordered layer with decreased optical absorption. Density function theory calculations supported the experimental results obtained from the study.
RADIATION PHYSICS AND CHEMISTRY
(2022)
Article
Engineering, Electrical & Electronic
Le Trung Hieu, Chung-Han Chiang, Deepak Anandan, Chang-Fu Dee, Azrul Azlan Hamzah, Ching-Ting Lee, Chung-Hsiung Lin, Edward Yi Chang
Summary: The electrical and thermal characteristics of AlGaN/GaN HEMT heterostructures grown on different substrates were investigated. It was found that the structure grown on SOI substrate exhibited better performance, with improved thermal-sensitive strain and reduced defect density, leading to enhanced temperature-dependence of the device.
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2022)
Article
Engineering, Electrical & Electronic
Yi Sheng Ng, Zhi Yong Yau, Poh Choon Ooi, Rahmat Zaki Auliya, Thiresamary Kurian, Mengying Xie, Sin Tee Tan, Yew Hoong Wong, Muhammad Aniq Shazni Mohammad Haniff, Wee Chen Gan, Chun Hui Tan, Sameer Al-Bati, Khatatbeh Ibtehaj, Azrul Azlan Hamzah, Chang Fu Dee
Summary: This study finds that the choice of electrode materials has an insignificant impact on the electrical output performance of PVDF-based PENGs. However, tuning the PVDF impedance by introducing 2D MXene nanofillers could be a useful approach to improve the performance.
SOLID-STATE ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Xia-Xi Zheng, Chun Wang, Jian-Hao Huang, Jen-Yao Huang, Daisuke Ueda, Krishna Pande, Chang Fu Dee, Ching Ting Lee, Edward-Yi Chang
Summary: This paper investigates the influence of group-III precursor injection rate on the material and electrical properties of InAlGaN/GaN heterostructures grown by Metalorganic Chemical Vapor Phase Deposition. It is demonstrated that high-quality GaN layers can be achieved by using the sputtered AlN/sapphire templates and optimized group-III injection rate, while maintaining high crystallinity and smooth surface of InAlGaN barrier layer.
Article
Materials Science, Multidisciplinary
Ping-Yu Tsai, Hoang-Tan-Ngoc Nguyen, Venkatesan Nagarajan, Chun-Hsiung Lin, Chang-Fu Dee, Shih-Chen Chen, Hao-Chung Kuo, Ching-Ting Lee, Edward Yi Chang
Summary: A high frequency enhancement mode quaternary InAlGaN/GaN MIS-HEMT with a recessed gate was fabricated using an oxygen-based digital etching technique. The threshold voltage of the device can be adjusted over a wide range using the digital etching technique, and the etch rate can be controlled with high flexibility. The fabricated device exhibits high performance.
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Biomaterials
P. C. Sivanathan, Kai Shen Ooi, Muhammad Aniq Shazni Mohammad Haniff, Mohsen Ahmadipour, Chang Fu Dee, Norfilza Mohd Mokhtar, Azrul Azlan Hamzah, Edward Y. Chang
Summary: Beta-2-microglobulin (beta M-2) is widely used to detect and evaluate various diseases due to its important role in the human immune system and kidney function. Recent studies have shown that biosensors can be used for simple, rapid, and reliable quantification of beta M-2, overcoming the limitations of sophisticated detection methods.
ACS BIOMATERIALS SCIENCE & ENGINEERING
(2022)
Review
Engineering, Electrical & Electronic
Mohsen Ahmadipour, Ai Ling Pang, Mohammad Rezaei Ardani, Swee-Yong Pung, Poh Choon Ooi, Azrul Azlan Hamzah, M. F. Mohd Razip Wee, Muhammad Aniq Shazni Mohammad Haniff, Chang Fu Dee, Ebrahim Mahmoudi, Agus Arsad, Muhammad Zamharir Ahmad, Ujjwal Pal, Khaled M. Chahrour, Seyyed Arash Haddadi
Summary: Currently, analyzing the acetone concentration in exhaled breath has become an appealing and non-invasive approach for detecting diabetes mellitus. With the advancements in gas sensors, this method shows potential for clinical applications.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Materials Science, Coatings & Films
Tsu-Ting Lee, Kashi Chiranjeevulu, Sireesha Pedaballi, Daire Cott, Annelies Delabie, Chang-Fu Dee, Edward Yi Chang
Summary: In this study, the nucleation, growth, and development of Al2O3 atomic layer deposition (ALD) on a polycrystalline WS2 monolayer created by metal-organic chemical vapor deposition (MOCVD) were investigated. The results provide insights into the intrinsic reactivity of WS2 and the influence of ALD on the growth of WS2, which are crucial for further exploration of the structure and properties of TMD monolayers.
JOURNAL OF VACUUM SCIENCE & TECHNOLOGY A
(2023)
Article
Engineering, Electrical & Electronic
Ping-Hsun Lee, Yueh-Chin Lin, Heng-Tung Hsu, Yi-Fan Tsao, Chang-Fu Dee, Pin Su, Edward Yi Chang
Summary: In this study, tall-gate-stem structures were used to improve the power performance of AlGaN/GaN HEMTs in the Ka-band. A film thinning process was also adopted to reduce parasitic capacitance. The results showed that devices with tall-gate-stem structures and film thinning process had higher cut-off frequency and maximum oscillation frequency values with lower parasitic capacitance. Load-pull measurement results demonstrated improved output power density and power added efficiency for the AlGaN/GaN HEMT with a tall gate stem at Ka-band.
IEEE JOURNAL OF THE ELECTRON DEVICES SOCIETY
(2023)
Article
Chemistry, Analytical
Muhammad Musoddiq Jaafar, Mohd Farhanulhakim Mohd Razip Wee, Hoang-Tan-Ngoc Nguyen, Le Trung Hieu, Rahul Rai, Ashish Kumar Sahoo, Chang Fu Dee, Edward Yi Chang, Burhanuddin Yeop Majlis, Clarence Augustine T. H. Tee
Summary: This study investigated the effect of a titanium/gold guiding layer on the surface acoustic wave propagation of GaN/sapphire substrate. It was found that the guiding layer could transform the propagation modes, act as a sensing layer for biomolecule binding, and influence the output signal in terms of frequency or velocity. The GaN/sapphire device integrated with a guiding layer could potentially be used as a biosensor and in wireless telecommunication applications.
Article
Chemistry, Physical
Nurul Ellena Abdul Razak, Chang Fu Dee, Morgan Madhuku, Ishaq Ahmad, Edward Yi Chang, Hung Wei Yu, Burhanuddin Yeop Majlis, Dilla Duryha Berhanuddin
Summary: The study shows that the luminescence at silicon band edge is greatly enhanced when co-implanted with boron and carbon. The role of boron in band edge emissions in silicon was investigated by introducing defects into the lattice structures. The aim was to increase the light emission intensity from silicon by boron implantation, resulting in the formation of dislocation loops. Photoluminescence measurements were performed to observe the emissions in the near-infrared region. Two main peaks were observed at approximately 1112 and 1170 nm in the samples incorporated with boron, with significantly higher intensities compared to pristine silicon samples.
Article
Chemistry, Analytical
Anis Amirah Alim, Roharsyafinaz Roslan, Sh. Nadzirah, Lina Khalida Saidi, P. Susthitha Menon, Ismail Aziah, Dee Chang Fu, Siti Aishah Sulaiman, Nor Azian Abdul Murad, Azrul Azlan Hamzah
Summary: This study focuses on the performance of a graphene-based field-effect transistor (FET) as a biosensor. A top-gate FET with a titanium dioxide-reduced graphene oxide (TiO2-rGO) nanocomposite as the transducer material was developed using the finite element method. Taguchi mixed-level method was used to design 18 3D models, investigating the effects of various factors on the device performance. The results showed that the channel length had the most significant impact on the drain current (I-d) value.
Article
Engineering, Electrical & Electronic
Ming-Wen Lee, Yueh-Chin Lin, Po-Sheng Chang, Yi-Fan Tsao, Heng-Tung Hsu, Chang-Fu Dee, Edward Yi Chang
Summary: This study presents the fabrication of AlGaN/GaN high-electron-mobility transistors (HEMTs) using Stepper Lithography on a 4-inch wafer for Ka-Band applications. A small gate length of 100 nm was achieved through a 2-Step Photolithography Process, and the gate region of the AlGaN/GaN HEMT was defined using two lithography steps to form gamma-shaped gates. The results demonstrate high electrical performance uniformity and excellent RF performance, indicating the potential of AlGaN/GaN HEMT fabrication with high yield for 5G applications using Stepper Lithography.
IEEE JOURNAL OF THE ELECTRON DEVICES SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Khaled M. Chahrour, Poh Choon Ooi, Ahmed Abdel Nazeer, Latifa A. Al-Hajji, Peverga R. Jubu, Chang Fu Dee, Mohsen Ahmadipour, Azrul Azlan Hamzah
Summary: Highly arranged porous anodic titania nanotube arrays were fabricated through anodization, followed by decoration of CuO/Cu nanoparticles and impregnation into graphene oxide aqueous solution to produce CuO/Cu/GO-ATNT. The resulting CuO/Cu/rGO nanocomposite ATNT electrode showed superior electro-catalytic performance for non-enzymatic glucose sensing. The electrode exhibited high sensitivity, low detection limit, wide linear range, stability, reproducibility, and selectivity. Rating: 9/10.
NEW JOURNAL OF CHEMISTRY
(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)
