Article
Chemistry, Multidisciplinary
Chunning Sun, Michael Schaferling, Ute Resch-Genger, Michael Gradzielski
Summary: Lanthanide-doped NaYF4 upconversion nano- and microcrystals were synthesized via a facile solvothermal approach, and the effects of various factors on the crystal phase, size, and morphology were systematically studied. The transition from alpha- to beta-phase depended on the volume ratio of EG/H2O and the molar ratio of NH4F/RE3+, while the morphology and size could be controlled by the type of organic co-solvent and Gd3+ dopant ions. The formation of larger beta-NaYF4 crystals with higher upconversion luminescence proceeded via intermediates of smaller crystals of cubic structure.
Review
Chemistry, Multidisciplinary
Thais K. L. Rezende, Helliomar P. P. Barbosa, Luiz F. F. dos Santos, Karmel de O. Lima, Patricia Alves de Matos, Tayana M. M. Tsubone, Rogeria R. Goncalves, Jefferson L. L. Ferrari
Summary: Light-based therapies and diagnoses, such as photodynamic therapy (PDT), have been widely used in various fields of medicine. PDT requires a light source and a light-sensitive compound to detect and destroy cancer cells. However, one of the challenges is the depth of light penetration into biological tissues.
FRONTIERS IN CHEMISTRY
(2022)
Review
Chemistry, Physical
Mihail Secu, Corina Secu, Cristina Bartha
Summary: Rare-earth doped oxyfluoride glass ceramics can be tailored for optical applications with high transparency and luminescence properties, while maintaining thermal and chemical advantages of oxide glasses. Sol-gel chemistry offers a flexible synthesis approach with control over purity and homogeneity, along with compositional flexibility. This review focuses on optical properties and processing influences on RE-doped luminescent nanocrystals, discussing perspectives and future development directions.
Article
Engineering, Electrical & Electronic
Wan Ying Xie, Peng Zhang, Hong Fang Lai, Yin Ling Lai, Zian Cheak Tiu
Summary: This work practically demonstrates the use of rare-earth composites as optical upconversion temperature dual mode sensing. By aliovalent doping, the upconversion luminescence of NaGdF4:Yb3+/Er3+/Zn2+ phosphors is enhanced, and the temperature sensing behaviors based on luminescence intensity and lifetime are recorded.
ELECTRONICS LETTERS
(2022)
Article
Biochemistry & Molecular Biology
Yaohui Xu, Liangjuan Gao, Quanhui Hou, Pingkeng Wu, Yunxuan Zhou, Zhao Ding
Summary: CeO2, an important rare earth (RE) oxide, was studied for its oxygen storage capacity (OSC) enhancement through doping with other rare earth ions (RE, RE = Yb, Y, Sm, and La). A solvothermal method followed by calcination was used to synthesize undoped and RE-doped CeO2 with different doping levels. The undoped CeO2 exhibited a porous multilayered morphology without additional templates. Various techniques were employed to analyze the lattice parameters, RE ion solubility limits, reducible-reoxidizable Cen+ ions, non-stoichiometric oxygen vacancy (VO) defects, and quantification of OSC. The maximum OSC values were achieved at specific doping levels: 5 mol.% Yb, 4 mol.% Y, 4 mol.% Sm, and 7 mol.% La, with increases of 93.04%, 68.26%, 53.04%, and 65.22%, respectively. The dominant factors for promoting OSC in RE-doped CeO2 were analyzed.
Article
Chemistry, Inorganic & Nuclear
Zoran Mazej, Evgeny Goreshnik
Summary: In this study, under specific conditions, different compositions of Ln(XeF2) and Ln(XeF2)3 salts can be prepared by using LnF(3) and XeF2 with different molar ratios, along with a specific synthetic approach. The structure of the La atom is influenced by the molar ratio and temperature, leading to changes in the crystal structure.
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
(2021)
Article
Optics
J. del-Castillo, J. Mendez-Ramos, P. Acosta-Mora, A. C. Yanes
Summary: Spectral conversion of light offers a promising approach for improving solar energy efficiency. High intense UV-blue up-conversion emissions in core-shell nanocrystals have been successfully utilized for the photodegradation of organic dye under NIR radiation, showcasing a solely upconversion photonic effect for converting incident NIR radiation before interaction with photocatalyst.
JOURNAL OF LUMINESCENCE
(2022)
Article
Nanoscience & Nanotechnology
Bo Jiang, Song Zhu, Wenyu Wang, Jin Li, Chun-Hua Dong, Lei Shi, Xinliang Zhang
Summary: Researchers have successfully achieved a white micro laser by using rare-earth elements and an ultra-high-quality microcavity, which has great potential for various applications.
Article
Materials Science, Ceramics
Ping Li, Liuyong Zhao, Song Wang, Xiaohui Zhang, Huaiyuan Jiang, Ruizhen Liu, Nengchuang Zhao, Jian Cheng, Caili Xu, He Zhao, Renliang Lyu
Summary: This study successfully synthesized rare-earth ions doped upconversion luminescent microparticles using the impinging stream method, optimizing the conditions to achieve high yield and good monodispersity of the particles.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
Meifeng Wang, Yiru Qin, Wei Shao, ZhiWang Cai, Xiaoyu Zhao, Yongjun Hu, Tao Zhang, Sheng Li, Mark T. Swihart, Yang Liu, Wei Wei
Summary: Surface modification of NaREF4 UCNPs with different functional molecules can enhance their multiple functionalities. A strategy based on heterovalent cation exchange reaction significantly increases the density of surface RE3 + ions, leading to improved loading capacity and enhanced colloidal stability and photodynamic therapy efficacy of the nanoparticles.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Bo Jiang, Yuchan Hu, Linhao Ren, Han Zhou, Lei Shi, Xinliang Zhang
Summary: Large anti-Stokes lasing can be achieved through multi-photon upconversion processes using rare earth elements. This study demonstrates the four- and five-photon upconversion lasing from rare earth elements under continuous-wave pump and room temperature conditions for the first time. The microlaser exhibits low thresholds and good stability of lasing intensity for practical applications, providing a prospect for high-performance short-wavelength lasers.
Review
Chemistry, Multidisciplinary
Xingwen Cheng, Jie Zhou, Jingyi Yue, Yang Wei, Chao Gao, Xiaoji Xie, Ling Huang
Summary: This review focuses on the advances in sensitizers in lanthanide-doped upconversion luminescence, including the current status, working mechanisms, design principles, as well as future challenges and endeavor directions.
Article
Nanoscience & Nanotechnology
Huan Chen, Meijuan Sun, Jie Ma, Baobao Zhang, Chi Wang, Lei Guo, Tao Ding, Zhenglong Zhang, Hairong Zheng, Hongxing Xu
Summary: Rare-earth-doped upconversion luminescence has unique emission spectra, but application is limited by background noise and quantum yield; multiplasmons-excited upconversion luminescence using surface plasmons polaritons achieves high luminescence enhancement and noise reduction; investigation of multiplasmon-excited luminescence sheds light on light-matter interactions and super-resolution imaging.
Article
Materials Science, Multidisciplinary
Han Zhang, Wen Zhang, Shengnan Gao, Xiaoyu Lu, Dongliang Zhang, Xiaowei Zhang, Mitang Wang
Summary: In this study, a catalyst was synthesized by epitaxial growth and mechanical grinding to enhance the photocatalytic activity of MIL-100 (Fe) under full spectrum and near-infrared light irradiation. The results showed that the photocatalytic activity of β-NaYF4: Yb, Tm@MIL-100(Fe) and β-NaYF4: Yb, Tm/MIL-100(Fe) was significantly higher than pure MIL-100(Fe), attributed to the strong up-conversion ultraviolet and visible light emission of NaYF4: Yb, Tm excited by 980 nm. The core-shell structure of β-NaYF4: Yb, Tm@MIL-100(Fe) slightly weakened the near-infrared light exciting the core, resulting in lower photocatalytic activity compared to β-NaYF4: Yb, Tm/MIL-100(Fe).
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Inorganic & Nuclear
Jingbo Yu, Lili Hu, Jinjun Ren
Summary: The study found that La3+ ions have promotion and suppression effects on the crystallization of PbF2, with a stronger attraction ability compared to Pb2+ ions. Intensive upconversion visible luminescence was observed in rare earth ion-doped oxyfluoride glasses, with most Er3+ ions dissolved in the LaF3 crystal.
INORGANIC CHEMISTRY
(2021)
Article
Optics
Shisheng Lin, Hang Lin, Guoxin Chen, Bo Wang, Xiangming Yue, Qiugui Huang, Ju Xu, Yao Cheng, Yuansheng Wang
Summary: The study demonstrates the application feasibility of the green-emitting phosphor in laser-driven projection through a new design based on CsPbBr3-glass nanocomposite. The mono-dispersed CsPbBr3 nanostructure in the glass matrix and the co-sintering with low-melting-glass ensure good luminescent properties, contributing to resistance to thermal shock, moisture, and blue laser irradiation.
LASER & PHOTONICS REVIEWS
(2021)
Article
Optics
Su Zhou, Yao Cheng, Ju Xu, Hang Lin, Wenjia Liang, Yuansheng Wang
Summary: This work proposes a ratiometric dual-emitting mechanoluminescence (ML) strategy to achieve stress-sensitive ML color variation. The combination of Lanthanide/transition-metal is used to construct the dual-activator ML system. The difference in electronic configuration between Lanthanide and transition-metal ions plays a key role in the response of corresponding luminescence kinetics to stress-induced local crystal field environment changes.
LASER & PHOTONICS REVIEWS
(2022)
Article
Chemistry, Inorganic & Nuclear
Jie Xu, Yao Cheng, Ju Xu, Hang Lin, Yuansheng Wang
Summary: The size-dependence of thermally enhanced upconversion luminescence (UCL) for UCNPs has been previously considered to be monotonous. However, this study finds that the monotonic relationship between UCL thermo-enhancement ratio and particle size is broken when the size of UCNPs goes below 7 nm. The breaking of monotonicity is accompanied by a change in the relationship between luminescence properties and particle size and supports the explanation of UCL thermo-enhancement through lattice thermal expansion-induced alleviation of surface quenching.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Optics
Qiugui Huang, Ping Sui, Feng Huang, Hang Lin, Bo Wang, Shisheng Lin, Pengfei Wang, Ju Xu, Yao Cheng, Yuansheng Wang
Summary: This study achieved high-quality laser-driven lighting by fabricating phosphor-in-glass films and using a rotating phosphor wheel for laser pumping. The development of a smart phosphor pattern design solved the issue of photon reabsorption and maintained a uniform angular color distribution.
LASER & PHOTONICS REVIEWS
(2022)
Article
Optics
Xiuxia Yang, Yao Cheng, Ju Xu, Hang Lin, Yuansheng Wang
Summary: In this paper, a novel strategy based on a lanthanide structural probe is demonstrated to realize ratiometric mechanoluminescence (ML) for stress sensing, aiming at improving the reliability of stress sensing by establishing the relationship between the ML asymmetry ratio of the structural probe and the applied stress through stress-induced change in local site symmetry.
LASER & PHOTONICS REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Su Zhou, Yao Cheng, Ju Xu, Hang Lin, Yuansheng Wang
Summary: Visualized self-powering stress sensing can be achieved through dual-activator phosphatic materials that enable color-resolved visualization of stress-sensing. The development of an evaluating system to quantify the stress-sensing performance of ratiometric ML materials is considered an important step towards practical application.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Optics
Shisheng Lin, Hang Lin, Qingming Huang, Hongyi Yang, Bo Wang, Pengfei Wang, Ping Sui, Ju Xu, Yao Cheng, Yuansheng Wang
Summary: This paper develops a new material form for high-performance white laser diode (LD) to improve energy efficiency and solid-state lighting. The material design features advantages such as high thermal conductivity, low cost, and easy preparation, resulting in bright and directional white light suitable for high-brightness long-distance illumination scenarios.
LASER & PHOTONICS REVIEWS
(2022)
Article
Optics
Xuefeng Li, Hang Lin, Shisheng Lin, Peng Li, Pengfei Wang, Ju Xu, Yao Cheng, Qiwei Zhang, Yuansheng Wang
Summary: A new type of inorganic photochromic material with self-bleaching capabilities has been developed, which allows for high-level readout and decoding efficiency. The material operates through a novel mechanism involving direct electron transfer, offering unique potential for encoding, displaying, and erasing time-dependent information. This finding has implications for advanced anti-counterfeiting technology and the design of smart devices.
LASER & PHOTONICS REVIEWS
(2023)
Article
Materials Science, Multidisciplinary
Xiaowei Zheng, Yao Cheng, Yan Gao, Tao Hu, Ju Xu, Hang Lin, Yuansheng Wang
Summary: The dual-response mechanoluminescence (ML) behavior of doped ZnGa2O4-PDMS composites upon the dynamic stretching-releasing cycle was studied. The ML behavior was found to be doping dependent and related to doping induced trap distribution. ZnGa2O4:Mn/PDMS with dual-response ML was used as an electronic skin to demonstrate its potential for stress-sensing applications.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Shisheng Lin, Hang Lin, Pengfei Wang, Ping Sui, Hongyi Yang, Ju Xu, Yao Cheng, Yuansheng Wang
Summary: Researchers have developed a new kind of orange-yellow-emitting solid-solution phosphor that shows abundant red-emissive components and nanosecond-range luminescent decay. The phosphor is compounded into an all-inorganic phosphor-in-glass composite, which enhances the luminescent performance. The study also investigates the mechanism of luminescence saturation and demonstrates the effects of thermal saturation and optical saturation.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Optics
Xuefeng Li, Yaman Wu, Hang Lin, Gengxu Chen, Yanxue Hao, Pengfei Wang, Shisheng Lin, Ju Xu, Yao Cheng, Yuansheng Wang
Summary: This study develops a new type of 3D optical storage medium, vanadium ions doped sodium borate glass, which exhibits intriguing photochromism and proposes a new photochromic mechanism. The developed PC glass is responsive to a low-price laser, has unique decoding modes, and shows good data erasibility.
LASER & PHOTONICS REVIEWS
(2023)
Article
Materials Science, Multidisciplinary
Xiuxia Yang, Dongxun Chen, Yanjie Liang, Su Zhou, Ju Xu, Lin Liu, Hang Lin, Yan Xiong, Yao Cheng, Yuansheng Wang
Summary: In this study, UVB mechanoluminescence (ML) materials with visible-blind features were developed for the first time to enable a bright-field visualization of stress-sensing. An energy-focusing process was applied to enhance the ML intensity in the UVB region, achieving a better signal-to-noise ratio. This work provides a new opportunity for the application of ML materials in bright field environments.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Pengfei Wang, Hang Lin, Shisheng Lin, Ping Sui, Ju Xu, Yao Cheng, Yuansheng Wang
Summary: A new kind of cyan-green-emitting phosphor-in-glass film was developed to solve the cyan cavity issue in laser-driven lighting technology. By adjusting the local coordination environment and introducing a photonic crystal film and phosphor wheel, the luminescence performance was further enhanced.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Chemistry, Multidisciplinary
Yaman Wu, Hang Lin, Renfu Li, Shisheng Lin, Chuxin Wu, Qiugui Huang, Ju Xu, Yao Cheng, Yuansheng Wang
Summary: In situ constructing program-designed nanostructures via laser-direct-writing (LDW) has been proven as a reliable strategy for optical storage (OS), with low-melting Ag+-doped TeO2-ZnO-Na2O (TZN) tellurite glass demonstrated as an ideal LDW OS medium. The glass is capable of generating molecule-like Ag-m(x+) nanoclusters with a broad emission band under laser irradiation, showcasing potential for 3D volumetric OS.
Article
Chemistry, Multidisciplinary
Youhui Zhou, Yao Cheng, Ju Xu, Hang Lin, Yuansheng Wang
Summary: Recent discoveries have uncovered the temperature-dependent upconversion luminescence behavior of inert-core/active-shell UCNPs, where both the sensitizer and activator are located near the nanoparticle surface, leading to a stronger luminescence thermal enhancement tendency compared to active-core UCNPs. This thermal enhancement behavior appears to be core-size dependent and is suggested to be attributed to the alleviation of surface quenching induced by lattice thermal expansion, based on the relationship between size-dependent luminescence and lattice expansion coefficient.
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)
