Article
Chemistry, Multidisciplinary
Pelayo Garcia-Acevedo, Manuel A. Gonzalez-Gomez, Angela Arnosa-Prieto, Lisandra de Castro-Alves, Yolanda Pineiro, Jose Rivas
Summary: Challenging magnetic hyperthermia (MH) applications require precise determination of magnetic properties in order to maximize heat release. In this study, a mean-field energy barrier model is proposed and used to determine the effective anisotropy constant (K-eff) of a model system of magnetic nanoparticles. The results show that the K-eff values are independent of the specific spacing shell thicknesses and close to bulk magnetite/maghemite values.
Article
Materials Science, Multidisciplinary
D. M. Clarke, C. Marquina, D. C. Lloyd, G. Vallejo-Fernandez
Summary: The distribution of shape anisotropy constants in colloids of iron oxide nanoparticles has been measured and found to be controlled by both particle sizes and particle elongations. These results are significant for predicting the heating properties of assemblies of magnetic nanoparticles.
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Raja Das, Ngoc Pham Kim, Supun B. Attanayake, Manh-Huong Phan, Hariharan Srikanth
Summary: The use of magnetic nanoparticles in cancer treatment has the potential to replace or supplement traditional methods, but issues such as low heating efficiency and retention in the body after treatment remain. By replacing Fe+2 ions with Co+2 ions, researchers have found a simple strategy to enhance the heating efficiency of sub-10 nm Fe3O4 nanoparticles.
APPLIED SCIENCES-BASEL
(2021)
Article
Chemistry, Multidisciplinary
Xiang Yu, Tianyu Yang, Ruoshui Liu, Di'an Wu, Daming Tian, Tianshi Zhou, Haitao Yan, Shuli He, Hao Zeng
Summary: In this study, the efficiency of alternating current magnetic field and near-infrared heating is enhanced by co-doping Zn and Co in magnetite nanoparticles. Optimum magnetic anisotropy is achieved by tuning the doping concentration to maximize the loss power under each magnetic field. The specific loss power of the nanoparticles greatly exceeds previous levels, making it a promising nanoplatform for multi-modal local hyperthermia therapy.
Article
Physics, Applied
J. M. Orozco-Henao, D. Muraca, F. H. Sanchez, P. Mendoza Zelis
Summary: The stoichiometry and effective anisotropy constant (K-eff) of iron-oxide nanoparticles with different sizes were studied using Mossbauer spectroscopy. The K-eff value was determined by comparing the size distribution and KeffV product obtained from Mossbauer spectra fitting. An overall surface anisotropy constant Ks was obtained by analyzing the relationship between the mean NP size, experimentally determined K-eff and mean magnetic anisotropy. The study also observed a relation between KeffV values and the magnetite/maghemite fraction in each sample.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Chiseon Ryu, Hwangjae Lee, Hohyeon Kim, Seong Hwang, Yaser Hadadian, Ayeskanta Mohanty, In-Kyu Park, Beongki Cho, Jungwon Yoon, Jae Young Lee
Summary: We synthesized magnetic IONP/polymer nanocomposites (MNCs) by embedding IONPs in a poly(L-lactic acid) (PLA) matrix via nanoemulsion. The MNCs showed enhanced heating efficiency with over two-fold increase compared to nonembedded bare IONPs. In addition, the MNCs exhibited good colloidal stability under physiological conditions and maintained their heating efficiency during 48 h of incubation in cell culture medium.
INTERNATIONAL JOURNAL OF NANOMEDICINE
(2022)
Article
Pharmacology & Pharmacy
Megha P. Desai, Ana C. Paiva-Santos, Mansingraj S. Nimbalkar, Kailas D. Sonawane, Pramod S. Patil, Kiran D. Pawar
Summary: In this study, gold nanoparticles (AuNPs), iron oxide magnetic nanoparticles (IOMNPs), and bimetallic gold-magnetic iron oxide nanoparticles (Au-IOMNPs) were synthesized using the iron-tolerant bacterium Bacillus badius. The Au-IOMNPs functionalized with doxorubicin showed cytotoxicity against MCF7 cells, with an IC50 value of 147 μg/mL. In addition, the IOMNPs showed potential for hyperthermia treatment, with a temperature rise up to 48 degrees Celsius under an applied current of 400 Oe.
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Mohamed S. A. Darwish, Hohyeon Kim, Minh Phu Bui, Tuan-Anh Le, Hwangjae Lee, Chiseon Ryu, Jae Young Lee, Jungwon Yoon
Summary: This study prepared multifunctional magnetic nanoparticles with high performance for hyperthermia and imaging functionality, showing promising potential for both diagnostic and therapeutic processes.
Article
Chemistry, Multidisciplinary
O. M. Lemine, Saja Algessair, Nawal Madkhali, Basma Al-Najar, Kheireddine El-Boubbou
Summary: This study reports the self-heating mechanisms of magnetite nanoparticles (MNPs) prepared by the Ko-precipitation Hydrolytic Basic (KHB) method. The MNPs exhibit favorable heating responses under magnetic excitation, making them promising candidates for magnetically triggered biomedical hyperthermia applications.
Article
Chemistry, Physical
Dulce A. Guzman-Rocha, Teodoro Cordova-Fraga, Jose J. Bernal-Alvarado, Zaira Lopez, Francisco A. Cholico, Luis H. Quintero, Jose A. Paz, Mario E. Cano
Summary: An exhaustive characterization of gum arabic-coated Fe3O4 magnetic nanoparticles was conducted, confirming their spherical morphology, good colloidal stability, and non-cytotoxicity.
Review
Nanoscience & Nanotechnology
Lekha Rethi, Lekshmi Rethi, Chia-Hung Liu, Tin Van Hyun, Chih-Hwa Chen, Er-Yuan Chuang
Summary: Iron oxide nanoparticles (IO-NPs) have great potential in the biomedical field, particularly in the field of cancer treatment, when combined with photothermal therapy (PTT), photodynamic therapy (PDT), and magnetic hyperthermia therapy (MHT).
INTERNATIONAL JOURNAL OF NANOMEDICINE
(2023)
Article
Materials Science, Multidisciplinary
Xudong Zuo, Hao Ding, Jiandong Zhang, Tao Fang, Dongmei Zhang
Summary: This study utilized carbothermal treatments with graphene to improve the magnetic heating efficiency of iron oxide nanoparticles, and found that higher treatment temperature significantly increased the specific absorption rate (SAR). The oxygen vacancies resulting from the carbon reduction process, along with the rapid grain growth, improved the eddy current loss and thus enhanced the magnetic heating effect.
RESULTS IN PHYSICS
(2022)
Article
Biochemistry & Molecular Biology
Santosh L. Gawali, Sandeep B. Shelar, Jagriti Gupta, K. C. Barick, P. A. Hassan
Summary: A facile approach for the preparation of protein conjugated glutaric acid functionalized Fe3O4 magnetic nanoparticles is reported, showing improved colloidal stability and heating efficacy in different media. These nanoparticles exhibit good stability and superparamagnetism, with enhanced heating efficacy compared to the original nanoparticles due to surface passivation by protein. Additionally, they demonstrate biocompatibility with normal cells and substantial cellular internalization in cancer cells, suggesting potential application in hyperthermia therapy.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2021)
Article
Chemistry, Physical
Wen-chan Ji, Ping Hu, Xiao-yu Wang, Bo Chen, Tian Chang, Fairy Fan Yang, Qi-gao Cao, Wen Zhang, Rui Dang, Kuai-she Wang
Summary: This paper optimized a one-step carbothermal reduction method for producing Fe3O4 nanoparticles with small size, strong magnetism, and high heating rates. The influence of alternating magnetic field parameters on heating rates was studied, leading to the identification of the optimal heating conditions under specific parameters.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Arunima Rajan, Niroj Kumar Sahu
Summary: Magnetically induced hyperthermia using iron oxide nanoparticles presents an effective alternative to traditional cancer treatments, with monodisperse oleate-coated magnetite nanorods demonstrating promising performance in biological studies.
ACS APPLIED NANO MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
E. M. Jefremovas, J. Alonso, M. de la Fuente Rodriguez, J. Rodriguez Fernandez, J. Espeso, D. P. Rojas, A. Garcia-Prieto, M. L. Fernandez-Gubieda, L. Fernandez Barquin
Article
Physics, Applied
M. L. Fdez-Gubieda, J. Alonso, A. Garcia-Prieto, A. Garcia-Arribas, L. Fernandez Barquin, A. Muela
JOURNAL OF APPLIED PHYSICS
(2020)
Article
Chemistry, Physical
Lourdes Marcano, Inaki Orue, Ana Garcia-Prieto, Radu Abrudan, Javier Alonso, Luis Fernandez Barquin, Sergio Valencia, Alicia Muela, M. Luisa Fdez-Gubieda
JOURNAL OF PHYSICAL CHEMISTRY C
(2020)
Article
Chemistry, Multidisciplinary
Zohreh Nemati, Mohammad Reza Zamani Kouhpanji, Fang Zhou, Raja Das, Kelly Makielski, Joseph Um, Manh-Huong Phan, Alicia Muela, Ma Luisa Fdez-Gubieda, Rhonda R. Franklin, Bethanie J. H. Stadler, Jaime F. Modiano, Javier Alonso
Article
Chemistry, Multidisciplinary
Raja Das, Javier Alonso Masa, Vijaysankar Kalappattil, Zohreh Nemati, Irati Rodrigo, Eneko Garaio, Jose Angel Garcia, Manh-Huong Phan, Hariharan Srikanth
Summary: Magnetic interactions are important in the heating efficiency of magnetic nanoparticles, with multigranular nanostructures showing significant implications of intraparticle interactions. NTs exhibit stronger intraparticle interactions, higher effective anisotropy, and saturation magnetization compared to NRs, yet NRs demonstrate higher heating efficiency in magnetic hyperthermia due to weaker intraparticle interactions.
Article
Materials Science, Multidisciplinary
Natalia Rinaldi-Montes, Pedro Gorria, Antonio B. Fuertes, David Martinez-Blanco, Zakariae Amghouz, Ines Puente-Orench, Luca Olivi, Javier Herrero-Martin, Maria Paz Fernandez-Garcia, Javier Alonso, Manh-Huong Phan, Hariharan Srikanth, Xavi Marti, Jesus A. Blanco
Summary: The surface symmetry breaking of Cr2O3 nanoparticles leads to a weak ferromagnetic signal that persists up to near room temperature. Additionally, the exchange-bias effect observed at low temperatures up to 30K exhibits resistance to thermal disorder.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Materials Science, Multidisciplinary
R. Das, J. Alonso, E. M. Jefremovas, L. Fernandez Barquin, P. K. Ngoc, H. T. Nguyen, D. T. Viet, P. V. Vinh, A. T. Duong
Summary: 11 nm diameter quasi-spherical and single phase CuO/Cu2O nanocomposites with different CuO:Cu2O ratios were synthesized using solvothermal process. The magnetic properties of the nanocomposites were found to be influenced by the presence of Cu2O phase.
MATERIALS TODAY COMMUNICATIONS
(2022)
Article
Nanoscience & Nanotechnology
David Gandia, Lourdes Marcano, Lucia Gandarias, Danny Villanueva, Inaki Orue, Radu Marius Abrudan, Sergio Valencia, Irati Rodrigo, Jose Angel Garcia, Alicia Muela, Ma Luisa Fdez-Gubieda, Javier Alonso
Summary: The influence of culture medium on the structural, morphological, and magnetic characteristics of Magnetospirillum magneticum AMB-1 magnetosome chains has been investigated. The introduction of Co ions in the MSGM + W bacteria affects the magnetic response and increases coercivity and remanence. The heating efficiency of these bacteria is also influenced by the culture medium, with MSGM - W bacteria being the most efficient below 35 mT, and FSM and MSGM + W bacteria being the most efficient above 60 mT, reaching a maximum SAR of 12 W g(-1).
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Engineering, Biomedical
Lucia Gandarias, Elizabeth M. Jefremovas, David Gandia, Lourdes Marcano, Virginia Martinez-Martinez, Pedro Ramos-Cabrer, Daniel M. Chevrier, Sergio Valencia, Luis Fernandez Barquin, M. Luisa Fdez-Gubieda, Javier Alonso, Ana Garcia-Prieto, Alicia Muela
Summary: Magnetotactic bacteria are potential theranostic agents due to their magnetic compass, specificity to chemical environments, and natural motility, which enable them to function as nanorobots. They can be tracked and guided to specific regions in the body and activated to generate a therapeutic response.
MATERIALS TODAY BIO
(2023)
Article
Biotechnology & Applied Microbiology
Phan Quoc Thong, Le Thi Thu Huong, Nguyen Dac Tu, Hoang Thi My Nhung, Lam Khanh, Do Hung Manh, Pham Hong Nam, Nguyen Xuan Phuc, Javier Alonso, Ju Qiao, Srinivas Sridhar, Ha Phuong Thu, Manh Huong Phan, Nguyen Thi Kim Thanh
Summary: In this study, novel magnetic trifunctional nanoparticles were designed and fabricated. These nanoparticles can be used for drug release, MRI, and magnetic fluid hyperthermia. The results showed that these nanoparticles have good drug loading and release ability, as well as high specific absorption rate and enhanced MRI contrast. Animal experiments further confirmed the advantages of these nanoparticles in tumor observation and magnetic fluid hyperthermia. Conclusion: These nanocarriers have the potential for drug release, cancer treatment monitoring, and therapy.
Correction
Chemistry, Multidisciplinary
E. M. Jefremovas, L. Gandarias, L. Marcano, A. Gacia-Prieto, I. Orue, A. Muela, M. L. Fdez-Gubieda, L. Fernandez Barquin, J. Alonso
NANOSCALE ADVANCES
(2022)
Article
Chemistry, Multidisciplinary
E. M. Jefremovas, L. Gandarias, L. Marcano, A. Gacia-Prieto, I. Orue, A. Muela, M. L. Fdez-Gubieda, L. Fernandez Barquin, J. Alonso
Summary: Magnetotactic bacteria can synthesize magnetite nanoparticles, and doping with rare earth elements can modify their magnetic properties. Experimental results show a decrease in magnetism after doping, which can be attributed to a reduction in magnetocrystalline and uniaxial anisotropies.
NANOSCALE ADVANCES
(2022)
Article
Computer Science, Information Systems
Elizabeth M. Jefremovas, Lucia Gandarias, Irati Rodrigo, Lourdes Marcano, Cordula Gruettner, Jose Angel Garcia, Eneko Garayo, Inaki Orue, Ana Garcia-Prieto, Alicia Muela, Maria Luisa Fernandez-Gubieda, Javier Alonso, Luis Fernandez Barquin
Summary: Magnetic Fluid Hyperthermia using iron oxide nanoparticles, particularly magnetite and maghemite, shows promise in cancer treatment due to their performance and biocompatibility. This study compares commercial Synomag Nanoflowers (pure maghemite) and bacterial magnetosomes (pure magnetite) synthesized by Magnetospirillum gryphiswaldense in terms of structural, magnetic properties, and heating efficiency.
Review
Chemistry, Multidisciplinary
Gabriel C. Lavorato, Raja Das, Javier Alonso Masa, Manh-Huong Phan, Hariharan Srikanth
Summary: The text discusses various biomedical applications based on heating at the nanoscale, including magnetic hyperthermia therapies and heat-triggered drug delivery. Researchers explore the combination of different inorganic materials in hybrid magnetic nanoparticles to achieve efficient heat delivery or obtain optical feedback.
NANOSCALE ADVANCES
(2021)
Article
Chemistry, Multidisciplinary
Elizabeth M. Jefremovas, Maria de la Fuente Rodriguez, Javier Alonso, Jesus Rodriguez Fernandez, Jose Ignacio Espeso, Ines Puente-Orench, Daniel P. Rojas, Ana Garcia-Prieto, Maria Luisa Fdez-Gubieda, Lidia Rodriguez Fernandez, Luis Fernandez Barquin
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)