Article
Chemistry, Physical
Anna N. Matsukatova, Artem Yu. Vdovichenko, Timofey D. Patsaev, Pavel A. Forsh, Pavel K. Kashkarov, Vyacheslav A. Demin, Andrey V. Emelyanov
Summary: This paper addresses the issue of high variability of memristive characteristics in brain-inspired neuromorphic computing systems and proposes methods to decrease the stochasticity of memristors and simplify the neural network architecture. Experiments show that optimizing the nanocomposite structure and performing post-fabrication annealing can improve the performance of memristors. Simulations demonstrate that neural networks based on these memristors have high classification accuracy and low variation in heart disease prediction. The controlled incorporation of nanocomposite memristors in neural networks shows promising prospects.
Article
Chemistry, Physical
Anna N. Matsukatova, Artem Yu. Vdovichenko, Timofey D. Patsaev, Pavel A. Forsh, Pavel K. Kashkarov, Vyacheslav A. Demin, Andrey V. Emelyanov
Summary: This paper addresses the issue of high variability in memristive characteristics and its negative effect on neural network training in parylene-based memristors. The study proposes methods to decrease internal stochasticity and simplify the neural network architecture of memristors, resulting in improved performance. The introduction of optimal Ag nanoparticle concentration and post-fabrication annealing show promising results in reducing voltage variation and increasing resistive switching window. The study also establishes a resistive switching mechanism for nanocomposite parylene-based memristors and demonstrates high classification accuracy with low variation in a formal neural network for heart disease prediction.
Article
Chemistry, Physical
Li Zhang, Zhenhua Tang, Junlin Fang, Xiujuan Jiang, Yan-Ping Jiang, Qi-Jun Sun, Jing-Min Fan, Xin-Gui Tang, Gaokuo Zhong
Summary: Artificial neural network-based computing has the potential to overcome the limitations of conventional computers and has a wide range of applications. By using NiO/Cu2O memristors to emulate biological synapses, the recognition accuracy of an artificial neural network based on synaptic weight modulation reached up to 96.84% on average, demonstrating the potential of artificial synapses in artificial intelligence systems.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Minsu Park, Jongmin Park, Sungjun Kim
Summary: In this work, the switching mechanisms of Ni/SiOx/ITO devices before and after reversible switching were studied, and their application in neuromorphic computing systems was investigated. Different electrical measurements and behaviors were observed in the RRAM devices, which were attributed to a change in the switching mechanisms induced by reversible switching in negative polarity. The identified electrical features were further used to implement neural networks.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Environmental
Shubin Liu, Yu Cheng, Fang Han, Suna Fan, Yaopeng Zhang
Summary: In this work, a multilevel storage memristor based on graphene oxide/silk fibroin/graphene oxide structure is reported. The memristor exhibits both binary and ternary switching behaviors, and the transition between the two modes can be regulated by the compliance current. The device shows stable, repeatable, and nonvolatile switching behaviors, and has great potential for simulating synaptic plasticity and application in artificial neural networks for digital image recognition, compression, and reconstruction. The highest accuracy of recognition for handwritten digital images using the ternary neural network built by the device reaches 92.3%. This research highlights the promise of graphene oxide/silk fibroin/graphene oxide memristors for improving memory cell density and simplifying the structure of memristor-based storage systems.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Yunseok Lee, Jiung Jang, Beomki Jeon, Kisong Lee, Daewon Chung, Sungjun Kim
Summary: This study demonstrates stable switching using AlSiOx as an alloyed insulator, evaluating the retention and endurance of multi-level cells through resistive switching characteristics analysis, and simulating the potentiation/depression curves of a neuromorphic device.
Article
Nanoscience & Nanotechnology
Xuelian Zhang, Haohan Chen, Siqi Cheng, Feng Guo, Wenjing Jie, Jianhua Hao
Summary: This study investigates the resistive switching characteristics, synaptic functions, and neuromorphic computing of memristors based on two-dimensional MXene Ti3C2 nanosheets. The results show that both digital and analog resistive switching behaviors can coexist in these memristors depending on the magnitude of operation voltage. Additionally, the artificial synapses based on these memristors exhibit basic synaptic functions and successfully emulate the learning-forgetting experience. Moreover, the artificial synapses can be used to construct an artificial neural network for image recognition.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Nanoscience & Nanotechnology
Boris S. Shvetsov, Anton A. Minnekhanov, Andrey Emelyanov, Aleksandr I. Ilyasov, Yulia Grishchenko, Maxim L. Zanaveskin, Aleksandr A. Nesmelov, Dmitry R. Streltsov, Timofey D. Patsaev, Alexander L. Vasiliev, Vladimir V. Rylkov, Vyacheslav A. Demin
Summary: This study focuses on studying the Cu/poly-p-xylylene(PPX)/Au memristive elements fabricated in the crossbar geometry, which have stable multilevel resistive switching and low operating voltage. It aims to be used in hardware neuromorphic computing systems.
Article
Chemistry, Physical
Wanjun Chen, Yiping Cheng, Jun Ge, ZeLin Ma, XuCheng Cao, Shanqing Diao, Zhiyu Liu, Shusheng Pan
Summary: We report an intrinsic memristor based on ultrathin 2D-like nonlayered amorphous SiOx, which exhibits low variability, nanosecond switching speed, good endurance, and high retention. XPS analysis confirms the resistive switching mechanism involving movement of oxygen vacancies under the electric field. Additionally, simulation results demonstrate the potential of the ultrathin SiOx memristor for practical implementation of nonlayered 2D-like materials based neural network inference accelerator, achieving a high recognition accuracy of about 98% for an MNIST image classifier.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Kaijin Kang, Wei Hu, Xiaosheng Tang
Summary: This Perspective provides a condensed overview of halide perovskite RRAMs, including materials, device performance, switching mechanism, and potential applications. The challenges of halide perovskite films, device fabrication, memory performance reliability, and understanding of switching mechanism are discussed, along with potential paths for future research.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2021)
Article
Engineering, Electrical & Electronic
Yuting Wu, Xinxin Wang, Wei D. Lu
Summary: Memristive devices have rich dynamics due to internal state variables determining conductance, which may serve as building blocks for biofaithful neuromorphic systems; these devices can be utilized in compute-in-memory architectures to process temporal data efficiently, implementing synaptic and neuronal functions effectively.
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2022)
Article
Chemistry, Multidisciplinary
Roman V. Tominov, Zakhar E. Vakulov, Nikita V. Polupanov, Aleksandr V. Saenko, Vadim I. Avilov, Oleg A. Ageev, Vladimir A. Smirnov
Summary: This article presents the experimental results on the resistive switching of nanocrystalline ZnO films grown by pulsed laser deposition, focusing on the impact of electrode material and nanoscale film thickness. The study shows that different bottom electrode materials exhibit nonlinear bipolar resistive switching effects in nanocrystalline ZnO films. Moreover, increasing the number of laser pulses leads to an increase in film thickness and affects electron concentration, electron mobility, and resistivity.
Review
Chemistry, Multidisciplinary
Somnath S. Kundale, Girish U. Kamble, Pradnya P. Patil, Snehal L. Patil, Kasturi A. Rokade, Atul C. Khot, Kiran A. Nirmal, Rajanish K. Kamat, Kyeong Heon Kim, Ho-Myoung An, Tukaram D. Dongale, Tae Geun Kim
Summary: Electrochemical synthesis is the most widely used technique for fabricating resistive-switching-based memory devices. This review article summarizes the electrochemical approaches for memory storage, neuromorphic computing, and sensing applications, highlighting their advantages and performance metrics. The challenges and future research directions for this field are also discussed.
Article
Materials Science, Ceramics
Srikant Kumar Mohanty, Debashis Panda, K. Poshan Kumar Reddy, Po-Tsung Lee, Chien-Hung Wu, Kow-Ming Chang
Summary: This study demonstrates that the HfOx-inserted TaOx memristor is an ideal synaptic device with analog switching ability for brain-inspired neuromorphic computing. By inserting a HfOx sandwiched layer, analog set/reset operations can be achieved along with improved switching uniformity. The research further proves that the HfOx-inserted TaOx memristor has great potential for future applications in neuromorphic computing.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Multidisciplinary
Zelin Cao, Bai Sun, Shuangsuo Mao, Guangdong Zhou, Xuegang Duan, Wentao Yan, Siyu Sun, Xiaoliang Chen, Jinyou Shao
Summary: In this study, a Ag/8-MnO2/Ti Memristor with analog-to-digital resistive switching behavior and voltage regulation capability was fabricated. The resistive switching mechanism was analyzed and it was found that the digital memristor characteristics were due to the entry and clustering of Ag+ ions in the 8-MnO2 layer. This work enriches the application of analog-to-digital bipolar memristor in neuromorphic computing and contributes to the realization of memristor in low-power and high-density circuit integration.
MATERIALS TODAY PHYSICS
(2023)
Article
Chemistry, Applied
Irshad Ahmad, Muhammad Shoaib Akhtar, Mian Faisal Manzoor, Muhammad Wajid, Muhammad Noman, Ejaz Ahmed, Mukhtar Ahmad, Waheed Qamar Khan, Anwar M. Rana
Summary: Yttrium and cerium co-doped ZnO nanoparticles showed efficient photoactivity for hydrogen evolution, attributed to the synergy between electronic anchoring effect and redox couples. This study introduces a new concept for synthesizing efficient photocatalysts using an economical route.
JOURNAL OF RARE EARTHS
(2021)
Article
Energy & Fuels
Muhammad Iqbal Hussain, R. M. Arif Khalil, Fayyaz Hussain, Anwar Manzoor Rana
Summary: The study investigated the magnetic, electronic, and thermoelectric properties of RbTaO3 and FrTaO3 ternary perovskite oxide materials through advanced DFT method, revealing them to be semiconductors with unique band gap energy values. RbTaO3 showed superior thermoelectric parameters, suggesting it as a promising candidate for efficient thermoelectric devices.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
R. M. Arif Khalil, Muhammad Iqbal Hussain, Fayyaz Hussain, Anwar Manzoor Rana, G. Murtaza, Muhammad Shakeel, Hafiz M. Asif Javed
Summary: Researchers are investigating the structural, vibrational, mechanical, and optoelectronic properties of lithium borohydride (LiBH4) as a promising candidate for hydrogen storage and optoelectronic devices. The energy band gap values indicate the insulating nature of LiBH4, while mechanical analysis shows it to be a brittle and stiffer material. Optical properties such as dielectric constant, refractive index, reflectivity, absorptivity, conductivity, and loss function were also studied, revealing potential applications beyond hydrogen storage.
INTERNATIONAL JOURNAL OF QUANTUM CHEMISTRY
(2021)
Article
Engineering, Electrical & Electronic
R. M. Arif Khalil, Muhammad Iqbal Hussain, Muhammad Imran, Fayyaz Hussain, Nyla Saeed, G. Murtaza, Anwar Manzoor Rana, Chandreswar Mahata
Summary: In this study, the structural, electronic and optical properties of Ce(2)S(3) compound were explored using first-principles simulation based on density functional theory (DFT) with CASTEP code. The obtained results show good agreement with experimental and previous theoretical values, indicating the stability of the orthorhombic crystal structure of Ce(2)S(3). The energy bandgap value suggests that Ce(2)S(3) belongs to the semiconductor category, with maximum optical reflectivity observed in the ultraviolet region.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Engineering, Electrical & Electronic
R. M. Arif Khalil, Muhammad Iqbal Hussain, Nyla Saeed, Anwar Manzoor Rana, Fayyaz Hussain
Summary: Through first-principles calculations, this study investigated the structural, electronic, optical, thermodynamic, and vibrational properties of ThS2. Results showed that ThS2 is a semiconductor with good dynamical stability, suitable for thermodynamic applications.
OPTICAL AND QUANTUM ELECTRONICS
(2021)
Article
Biochemical Research Methods
Ejaz Ahmad Khera, Hafeez Ullah, Muhammad Imran, Niaz Ahmad Niaz, Fayyaz Hussain, R. M. Arif Khalil, Umbreen Resheed, Anwar Manzoor Rana, Muhammad Iqbal Hussain, Chandreswar Mahata, Sungjun Kim
Summary: The study reveals the structural, electronic, and thermoelectric properties of AZr(1-x)M(x)O(3) composites with and without an oxygen vacancy and dopants, using Density Functional Theory and first-principles simulation codes. The results show enhanced charge conduction and formation of conducting filaments due to dopants and oxygen vacancies.
JOURNAL OF MOLECULAR GRAPHICS & MODELLING
(2021)
Article
Optics
Shafqat Hayat, R. M. Arif Khalil, Muhammad Iqbal Hussain, Anwar Manzoor Rana, Fayyaz Hussain
Summary: The study comprehensively investigates the properties of novel hydride perovskites using first principles method, revealing that NiCuH3 may be a more suitable material for hydrogen storage applications.
Article
Nanoscience & Nanotechnology
R. M. Arif Khalil, Shafqat Hayat, Muhammad Iqbal Hussain, Anwar Manzoor Rana, Fayyaz Hussain
Summary: The current study investigates the structural, electronic, optical, and magnetic properties of perovskite hydrides XGaH3 (X = Rb, Cs, Fr) through density functional theory. The hydrides exhibit metallic behavior and anti-ferromagnetism, with FrGaH3 identified as the most suitable material for hydrogen storage in optical analysis.
Article
Optics
R. M. Arif Khalil, Muhammad Iqbal Hussain, Rabail Fatima, Fayyaz Hussain, Anwar Manzoor Rana, H. H. Hegazy, Abeer Mera
Summary: The study investigated the structural, electronic, and optical properties of pristine AgGaO3 and doped Ag1-xCrxGaO3 using DFT simulations. It was found that Cr doping significantly affected the electronic band gap and optical conductivity, making the doped materials more suitable for solar cell and optoelectronic applications. Additionally, magnetism was induced in all Cr-doped perovskites with a net magnetic moment of 3 mu B per Cr atom.
Article
Nanoscience & Nanotechnology
Farhana Kousar, Umbreen Rasheed, Muhammad Imran, Niaz Ahmad Niaz, Fayyaz Hussain, R. M. Arif Khalil, M. Atif Sattar, Muhammad Naeem Ashiq, Anwar Manzoor Rana, Chandreswar Mahata
Summary: This study explores the importance of polarons in mediating resistive switching mechanisms in TiO2-based memristors, showcasing the influence of different dopant systems on polaron formation and conductivity. Cu is identified as the best substitutional dopant for polarons, and further research on tuning polarons in substitutionally doped TiO2 is suggested. Interstitially doped systems with Ag, Cu, and Ni did not show polaron formation for resistive switching, emphasizing the potential of charged states tuned polarons in creating conducting pathways for polaronic resistive switching mechanisms in nanoelectronics.
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
(2021)
Article
Engineering, Electrical & Electronic
Shafqat Hayat, R. M. Arif Khalil, Muhammad Iqbal Hussain, A. M. Rana, Fayyaz Hussain
Summary: LiXH3 (X = Cr, Fe, Co, & Zn) hydride type perovskites have been studied using density functional theory (DFT) to assess their structural, optoelectronic, magnetic, hydrogen storage, and mechanical properties, showing them to be suitable for hydrogen storage applications. The study also evaluated band structures, total density of states, lattice constants, and mechanical parameters, providing insights into the potential use of these materials in transportation for hydrogen storage. Additionally, optical properties were analyzed to understand the materials' behavior in optical applications related to hydrogen storage. This theoretical approach contributes valuable information for the future exploration of these materials.
JOURNAL OF COMPUTATIONAL ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
R. M. Arif Khalil, Muhammad Iqbal Hussain, Nadia Luqman, Fayyaz Hussain, Anwar Manzoor Rana, Muhammad Saeed Akhtar, Rana Farhat Mehmood
Summary: The first-principles approach was used to study the properties of titanium-based MAX materials. The compounds were found to be conductive and have good mechanical stability and optical performance. These materials may have potential applications in advanced electronic and magnetic devices and as hard coating materials.
Article
Physics, Condensed Matter
Shafqat Hayat, R. M. Arif Khalil, Muhammad Iqbal Hussain, Anwar Manzoor Rana, Fayyaz Hussain
Summary: In this study, the structural, electronic, optical, vibrational, thermodynamic, and mechanical properties of beryllium-based perovskite-type halides KBeBr3, RbBeBr3, and CsBeBr3 in triclinic phase were investigated. The results show that these materials have potential applications in optoelectronic devices.
SOLID STATE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
R. M. Arif Khalil, Muhammad Iqbal Hussain, Saba Arshad, Fayyaz Hussain, Anwar Manzoor Rana, Hafiz M. Asif Javed
Summary: This article uses density functional theory and first-principles simulation to study the structural, electronic, and optical properties of two disulfide compounds. The results are in agreement with experimental values and show the potential of these compounds in optoelectronic device applications.
SURFACE REVIEW AND LETTERS
(2022)
Article
Engineering, Electrical & Electronic
R. M. Arif Khalil, Muhammad Iqbal Hussain, Nyla Saeed, Fayyaz Hussain, Anwar Manzoor Rana, Amjad Ali, H. H. Somaily
Summary: By using the first principles approach, the structural, optoelectronic, and vibrational properties of Sb2S3 were studied. The results showed that Sb2S3 has a crystal structure and belongs to the semiconductor category with a wide range of radiation absorption capability. The analysis also confirmed its dynamical stability. Therefore, Sb2S3 is a potential material for applications in solar cells.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
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)