Article
Materials Science, Multidisciplinary
Mohabbat Amirnejad, Mohammad Rajabi, Roohollah Jamaati
Summary: In this study, different textures of Ti6Al4V alloy with the same microstructure were developed through heat treatment in the alpha + beta phase region. The corrosion rate of the basal texture was found to be 6 times lower than that of the near prismatic texture, with the formation of a thick crack-free passive layer on the corroded surface. These findings provide important insights into the corrosion performance of the alloy.
Article
Engineering, Electrical & Electronic
C. Ulutas, O. Erken, M. Gunes, O. M. Ozkendir, C. Gumus
Summary: In this study, gamma-manganese sulphide (gamma-MnS) films were prepared at 50 degrees C using Chemical Bath Deposition Method (CBD) with varying thickness and deposition time. The films were characterized using X-ray Absorption Fine Structure Spectroscopy (XAFS), X-ray diffraction (XRD), optical absorption, FE-SEM, and EDX. Analysis showed that increasing film thickness led to the formation of crystal structures, decreasing optical band gap values. Hall measurement results indicated varying mobility and resistivity of the films with increasing thickness.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Jungang He, Xianchang Zhou, Ya Wang, Mohan Yuan, Hang Xia, Xiao Chen, You Ge, Xia Wang, Liang Gao, Jiang Tang
Summary: In this research, a strategy to extend the response spectra of PbS CQDs by incorporating PbNO2 impurities was reported. The device showed an obvious response with responsivity of 0.11 A W-1 and a detectivity of 5.38 x 10(8) Jones under 3000 nm light illumination at room temperature. XPS results indicated the formation of in-gap states (IGSs) by removing oleate ligands and inducing oxidation impurities on the CQD surface. This strategy provides an alternative avenue for the use of CQDs in optoelectronic devices with a broad response range.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
U. Chalapathi, Si-Hyun Park, Won Jun Choi
Summary: Doping of tin improves the microstructure and electrical properties of lead sulfide films, decreases the band gap, and increases the hole mobility. Tin-doped lead sulfide films are beneficial for infrared photodetector applications.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Materials Science, Multidisciplinary
Mahmood Sharifitabar, Samira Khorshahian, Mahdi Shafiee Afarani, Pravin Kumar, Neelesh Kumar Jain
Summary: The high-temperature oxidation behavior of Inconel 625 superalloy manufactured by the wire arc additive manufacturing (WAAM) technique was investigated. The results showed the formation of specific phases on the alloy surface at high temperatures, along with the growth kinetics of the oxide layer.
Article
Materials Science, Multidisciplinary
Bin Liang, Xingqi Liao, Bo Geng, Qishuai Zhu, Ming Yu, Jiacheng Li, Kangwei Liu, Dechang Jia, Zhihua Yang, Yu Zhou
Summary: MXenes, with their impressive mechanical and physicochemical properties, show great potential in various applications. However, not much research has been done on their high-temperature properties, particularly in silicoboron carbonitride (Si-B-C-N) composite ceramics above 1500 degrees C. In this study, the influence of MXene (Ti3C2Tx) additives on the oxidation resistance of Si-B-C-N ceramics was investigated for the first time at temperatures up to 1600 degrees C. The results show that the addition of 3.0 wt% Ti3C2Tx can improve the oxidation resistance at 1600 degrees C, while higher or lower additions may worsen the anti-oxidation properties.
Article
Chemistry, Physical
Carolyn L. Hartley, Melody L. Kessler, Christian Y. Dones Lassalle, Andrew M. Camp, Jillian L. Dempsey
Summary: Quantum dots (QDs) are semiconductor nanocrystals with tunable optical properties through postsynthetic ligand exchanges. The stability of QD surfaces in optoelectronic devices is influenced by the composition of the ligand shell. Surface reduction of QDs is highly sensitive to the composition of the ligand shell.
CHEMISTRY OF MATERIALS
(2021)
Article
Chemistry, Physical
Anurag Gautam, Pragya Komal, Ram Sevak Singh, Prabhat Gautam, S. K. Manjari, R. S. Ningthoujam
Summary: This paper reports the direct synthesis of water dispersed gold nanoparticles encapsulated in polyvinyl alcohol (PVA) as a reducer and capping agent. The nanoparticles were found to have a fcc crystal structure with a size of around 22 nm, as confirmed by XRD and SEM analysis. The UV-visible analysis showed a surface plasmon resonance band at approximately 550 nm, confirming the formation of gold nanoparticles, which was further supported by EDX analysis.
JOURNAL OF MOLECULAR LIQUIDS
(2021)
Article
Chemistry, Physical
Benoit Sklenard, Gabriel Mugny, Bilal Chehaibou, Christophe Delerue, Arthur Arnaud, Jing Li
Summary: The study investigates the electronic structure and optical bandgap of PbS quantum dots in different solvents, emphasizing the significant influence of the dielectric environment on their properties, particularly the electronic structure and electronic bandgap, providing guidance for the design of optoelectronic devices based on PbS quantum dots.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Fei Li, Jiao Jiao Liu, Qiulei Xu, Ruiguang Chang, Lei Wang, Zhenghui Wu, Huaibin Shen, Zuliang Du
Summary: In this study, the addition of octanethiol surfactant into PbS quantum dots (QDs) was found to suppress surface traps and oxidation, resulting in improved photoluminescence efficiency and stability. By efficiently passivating surface traps and reducing coupling between excitons and surface states, PbS-based QLEDs achieved a breakthrough high radiance under large working current.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Andre Maier, Fabian Strauss, Pia Kohlschreiber, Christine Schedel, Kai Braun, Marcus Scheele
Summary: The intrinsic response time and bandwidth of lead sulfide nanocrystal photodetectors were investigated using a two-pulse coincidence photoresponse technique. The results indicated an intrinsic response time of approximately 1 ns and an intrinsic bandwidth of approximately 0.55 GHz. Auger recombination assisted by nanocrystal surface defects was identified as the dominant mechanism. The intrinsic response time could be further tuned by controlling ligand coverage and trap states.
Article
Nanoscience & Nanotechnology
Adam E. Colbert, Diogenes Placencia, Erin L. Ratcliff, Janice E. Boercker, Paul Lee, Edward H. Aifer, Joseph G. Tischler
Summary: Improving passivation strategies for large-diameter nanocrystals is crucial for advancing infrared photodetectors based on colloidal PbS. Comparing devices made with PbS/PbClx (core/shell) nanocrystals to those with PbS-only cores, it was found that core/shell structures result in higher external quantum efficiencies and lower dark current densities. The performance difference between the two synthetic methods is attributed to unfavorable interface dipole formation and surface defect states.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Materials Science, Multidisciplinary
Yun Xie, Yuanchao Huang, Yihang Li, Xiao Peng
Summary: According to Wagner's classical oxidation theory, a Ni-Cr alloy with Cr concentration below the critical level for external Cr2O3 scale formation but above the level for steady-state growth, can be converted from a NiO former to a Cr2O3 former by catalyzing selective Cr oxidation at the beginning of oxidation. When alpha-Al2O3 nanoparticles are spread on the surface, it causes the Ni-10Cr alloy to become a Cr2O3 former during oxidation at 800 degrees C. The effect of alpha-Al2O3 on oxidation is explained.
Article
Chemistry, Physical
Hemant Kumar, Mangej Singh
Summary: In this research, CdTe thin film was deposited on N-type Si substrate using a thermal evaporation method. The effect of hydrogenation and annealing on the Si/CdTe junction was investigated. The current-voltage (I-V) characteristics of the Si/CdTe junction were obtained and found to change with hydrogenation and annealing. Scanning electron microscopy (SEM) images showed that the deposited CdTe layer had a regular and crystalline structure. The changes in I-V characteristics with hydrogenation and annealing make it useful for hydrogen and light sensing devices.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Electrical & Electronic
U. Chalapathi, Si-Hyun Park, Won Jun Choi
Summary: A two-step chemical bath deposition method is developed to enhance the grain growth and hole mobility of PbS thin films. Deposition at low temperature in the first step acts as a seed layer for the growth of large-grained PbS in the second step, leading to improved grain size and hole mobility. The two-step CBD method is useful for the growth of PbS for optoelectronic devices applications.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Chemistry, Physical
Abhishek Rajput, Savan K. Raj, Oksana V. Lebedeva, Alexandra N. Chesnokova, Tatiana V. Raskulova, Vaibhav Kulshrestha
Summary: Functionalized carbon dots were investigated as potential organic fillers for sulfonated poly (ether sulfone) based composite cation exchange membranes to enhance membrane performance. The addition of sulfonated carbon dots improved physicochemical and electrochemical properties of the composite membranes, resulting in increased ionic conductivity and ion exchange capacity. The composite membranes showed a significant reduction in power consumption during salt removal from brackish water in comparison to membranes without the filler material.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Chemistry, Physical
Anmol Shahi, Chandresh Dwivedi, S. D. Manjare, Vaibhav Kulshrestha
Summary: By preparing sulphonated poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-co-HFP) and sulphonated graphene oxide (SGO) composite stable and efficient polymer electrolyte membrane, not only the electrolysis performance of HI can be improved, but also simultaneous production of H2 and I2 can be achieved.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Engineering, Chemical
Vikrant Yadav, Nehal H. Rathod, Jeet Sharma, Vaibhav Kulshrestha
Summary: This article introduces the synthesis and analysis of poly(vinylidene fluoride-co-hexafluompropylene) based anion exchange membranes for electrodialysis, demonstrating their notable electrochemical properties for brackish water desalination. TEM and AFM imaging provide insights into the membrane's structure and properties, contributing to the optimization of AEMs for efficient electrodialysis applications.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Proceedings Paper
Polymer Science
Anju Yadav, Dinesh Kumar Yadav, Jitendra Kumar Mishra, Rajesh Sahu, S. K. Jain, Shalini Dixit, Garima Agarwal, Narendra Jakhar, Balram Tripathi
Summary: Polymer nanocomposites with barium titanate fillers exhibit superior energy storage performance due to enhanced breakdown strength and improved dielectric properties. The concentration of barium titanate fillers plays a crucial role in achieving large dielectric constants and energy densities in ceramic/polymer composites for energy storage device applications.
MACROMOLECULAR SYMPOSIA
(2021)
Proceedings Paper
Polymer Science
Nisha Srivastava, Ankur Jain, K. B. Sharma, Balram Tripathi
Summary: rGO/polystyrene composites are prepared using sonication and casting method. The composites exhibit improved morphology, dispersion, and stability, making them suitable for applications in hybrid systems such as electrodes, batteries, and thermal interface materials. This is confirmed by XRD spectra, Raman spectra, and SEM results showing the structure, orientation, and surface morphology of the fabricated composites.
MACROMOLECULAR SYMPOSIA
(2021)
Proceedings Paper
Polymer Science
Anu Malhotra, Rama S. Lokhande, Rajesh Sahu, Sushil K. Jain, K. B. Sharma, Balram Tripathi
Summary: The study investigates the adsorption of a cationic dye, methylene blue, onto coconut coir dust, aiming to explore the potential of coconut coir as a biosorbent for dye removal. The high moisture sorption of coconut coir is attributed to the presence of hydroxyl and polar groups in the cellulosic fibers.
MACROMOLECULAR SYMPOSIA
(2021)
Article
Materials Science, Multidisciplinary
Rajesh Sahu, Tarun Patodia, Dinesh Yadav, S. K. Jain, Balram Tripathi
Summary: The visible light induced photocatalytic performance of MWCNTs intercalated CdS nanocomposites has been studied in this study. The XRD spectra confirmed the hexagonal structure and average particle size distribution of the nanocomposites. SEM images showed the close contact between MWCNTs and CdS with a quasi-spherical shape. UV-Vis spectra indicated enhanced optical absorption and photocatalytic adsorption.
MATERIALS LETTERS-X
(2022)
Article
Nanoscience & Nanotechnology
Rajesh K. K. Katiyar, Claudia C. Zuluaga C. Gomez, Swati Katiyar, Balram Tripathi, Gerardo Morell, Brad R. R. Weiner, Ram S. Katiyar
Summary: In this manuscript, the role of ferroelectric nanoparticles (FNPs) coated separators in capacity retention at high current density on S/SWCNT composite cathodes is reported. FNPs coated separators showed a capacity retention improvement of more than 100%, while commercial separator polypropylene (PP) had a retention rate of 72%. The FNPs coated separator acted as a repulsive charge on the separator surface to retard polysulfide migration and protected the surface of lithium from dendrite formation, resulting in higher capacity retention and stability.
Article
Chemistry, Multidisciplinary
Claudia C. Zuluaga-Gomez, Christian O. Plaza-Rivera, Balram Tripathi, Rajesh K. Katiyar, Dhiren K. Pradhan, Gerardo Morell, Yi Lin, Margarita Correa, Ram S. Katiyar
Summary: A composite cathode material of sulfur/ferroelectric nanoparticles/holey graphene (S/FNPs/hG) was fabricated to address the limitations of capacity fading in high-mass-loading Li-S batteries. The unique structure of holey graphene enables fast electron and ion transport within the electrode while mitigating volume expansion. Additionally, the ferroelectric polarization induced by FNPs effectively reduces the shuttling effect. The S/FNPs/hG composite cathodes exhibit sustainable high specific capacity, reliable cycle performance, and superior rate capability for potential commercial applications.
Article
Electrochemistry
Claudia C. C. Zuluaga-Gomez, Balram Tripathi, Christian O. O. Plaza-Rivera, Rajesh K. K. Katiyar, Margarita Correa, Dhiren K. K. Pradhan, Gerardo Morell, Ram S. S. Katiyar
Summary: This study investigates the impact of incorporating ferroelectric nanoparticles into the cathodes of lithium-sulfur batteries. The results show that the inclusion of ferroelectric nanoparticles can reduce the formation of polysulfides and improve the cycling response and stability of the batteries, leading to high performance.
Article
Physics, Multidisciplinary
Jagmohan Lal Sharma, S. K. Jain, Balram Tripathi, M. C. Mishra
Summary: The study investigates the properties of CdS thin film, which is used as a window material for solar cells and optical devices. The CdS thin film is prepared using the sol-gel method and characterized for its structural, optical, and electrical properties. The results show the average crystallite sizes, micro strain, and dislocation density of the CdS samples, as well as their optical band gap and absorption wavelength. The study also examines the bond formation, imperfections, and impurities in the CdS thin film.
EAST EUROPEAN JOURNAL OF PHYSICS
(2023)
Proceedings Paper
Materials Science, Multidisciplinary
Rajesh Sahu, Suchitra Manjhu, Anu Malhotra, K. B. Sharma, S. K. Jain, Balram Tripathi
Summary: Multi-walled carbon nanotubes dispersed lead sulphide nanophoto catalyst synthesized by chemical method shows distinct photocatalytic behavior in the degradation of methylene blue dye under visible light. The reduction in crystalline size of PbS nanocrystals in MWCNTs/PbS nanocomposites indicates the formation of a good photo catalyst and excellent co-catalysts for the photocatalytic process. MWCNTs as co-catalysts increase the reaction rate and reduce photo corrosion of the photo catalyst after adsorption on the surface of PbS nanocrystals.
MATERIALS TODAY-PROCEEDINGS
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
Anju Yadav, Dinesh Kumar Yadav, B. L. Choudhary, Narendra Jakhar, S. K. Jain, Balram Tripathi
Summary: In this study, flexible nanocomposites were synthesized using barium titanate as filler and polyvinyl alcohol as matrix. The composite materials were characterized and it was found that BT/PVA nanocomposites exhibited enhanced dielectric properties, making them suitable for energy storage applications.
MATERIALS TODAY-PROCEEDINGS
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
Anu Malhotra, Sonia Srivastava, Suchitra Manjhu, Rama S. Lokhande, Rajesh Sahu, S. K. Jain, K. B. Sharma, Balram Tripathi
Summary: In this study, palm leaves were used as a bio sorbent to remove malachite green. The influence of factors such as time, initial dye concentration, color discharged dilution, pH, and amount of bio sorbent on dye removal percentage was investigated.
MATERIALS TODAY-PROCEEDINGS
(2022)
Proceedings Paper
Materials Science, Multidisciplinary
Tarun Patodia, K. B. Sharma, S. Dixit, S. Katyayan, G. Agarwal, Ankur Jain, S. K. Jain, Balram Tripathi
Summary: This study fabricated flexible MWCNT-sulfur composite electrodes and characterized them using various techniques. The results showed stable structural phases and uniform surface morphology, as well as good interconnection between sulfur and CNTs. Insertion of MWCNTs at low frequency can increase the dielectric constant, and the electrochemical discharge mechanism demonstrates stable capacity.
MATERIALS TODAY-PROCEEDINGS
(2021)
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)
