Article
Materials Science, Multidisciplinary
Laxmi Kumari, Utkarsh Kumar, B. C. Yadav, Manisha Gupta
Summary: In this study, polyvinylpyrrolidone-coated iron oxide nanocomposite was successfully synthesized and characterized. The nanocomposite exhibited a small crystallite size and a PVP coating, with no impurities detected. A thin film of the synthesized material was prepared and used as a gas sensor, demonstrating short response and recovery times.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Physics, Multidisciplinary
Ahmed Abdel-Salam, Islam Gomaa, A. Khalid, T. S. Soliman
Summary: In this study, Hematite (Fe2O3) nanoparticles and Fe2O3-reduced graphene oxide (rGO) nanocomposite were successfully synthesized using a co-precipitation method. The addition of rGO as a passivation layer improved the optical properties of Fe2O3. Various characterization techniques were used to investigate the modification of Fe2O3 structure in the presence of rGO. The refractive index values calculated from different relations were compared with those obtained from the Duffy relation, showing good agreement. It was found that the addition of rGO decreased the optical bandgap and electronegativity of Fe2O3, while increasing the refractive index. Therefore, the Fe2O3-rGO nanocomposite has the potential to be used in various applications.
Article
Chemistry, Analytical
Zhengmao Cao, Zhongwei Jiang, Liping Cao, Yao Wang, Changhao Feng, Chengzhi Huang, Yuanfang Li
Summary: In this research, in situ Raman and XRD techniques were used to investigate the gas-sensing nature of alpha-Fe2O3 sensing material, derived from Fe-based metal-organic gel. The surface oxygen vacancy changes of alpha-Fe2O3 were found to play a crucial role during acetone gas sensing. The prepared alpha-Fe2O3 gas sensor exhibited excellent gas-sensing performance at high temperature.
Article
Biochemical Research Methods
Panagiotis Giamougiannis, Camilo L. M. Morais, Rita Grabowska, Katherine M. Ashton, Nicholas J. Wood, Pierre L. Martin-Hirsch, Francis L. Martin
Summary: The study compared the performance of blood plasma, serum, and ascitic fluid in ovarian cancer detection using Raman microspectroscopy. Ascitic fluid showed the best class separation in both unsupervised and supervised discrimination approaches, with higher classification accuracies, sensitivities, and specificities compared to plasma or serum. The presence of collagen information in ascitic fluid was found to be responsible for distinguishing ovarian cancer samples, making it a potential diagnostic method for ovarian cancer.
ANALYTICAL AND BIOANALYTICAL CHEMISTRY
(2021)
Article
Chemistry, Multidisciplinary
Lucian Diamandescu, Felicia Tolea, Marcel Feder, Florin Vasiliu, Ionel Mercioniu, Monica Enculescu, Traian Popescu, Bogdan Popescu
Summary: The equimolar oxide mixture beta-Ga2O3-alpha-Fe2O3 was processed by high-energy ball milling to obtain nanoscaled GaFeO3 ortho-ferrite. After 12 hours of HEBM, only nanoscaled gallium-doped alpha-Fe2O3 was obtained, with the GaFeO3 structure being achieved after subsequent calcination.
Article
Engineering, Electrical & Electronic
Ambikesh Soni, Gagan Kant Tripathi, Priyavand Bundela, Pradeep Kumar Khiriya, Purnima Swarup Khare
Summary: The study focuses on the synthesis and characterization of CdSe quantum dots using the solvothermal method. CdSe quantum dots were prepared by adjusting the pH value from 5 to 10, with glacial acetic acid added dropwise. The TEM characterization revealed an average particle size of 9.65 nm. The average band gap was calculated as 3.25 eV using a Tauc plot. XRD confirmed an average crystallite size of 6.93 nm. The CdSe nanoparticles at pH 5 exhibited the fastest degradation of dye water, as confirmed by UV-visible spectrophotometer.
OPTICAL AND QUANTUM ELECTRONICS
(2023)
Article
Engineering, Mechanical
Gerda Vaitkunaite, Cayetano Espejo, Benoit Thiebaut, Anne Neville, Ardian Morina
Summary: This study analyzes the important role of the piston-liner tribological contact in controlling friction energy losses in a passenger car engine. The results confirm that the spatial distribution of low-friction MoS2 tribofilm plays a pivotal role in reducing friction in the piston-liner contact. The presence of MoS2 throughout the engine cycle indicates the effectiveness of the friction modifier MoDTC, contributing to overall energy savings in passenger cars.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Chemistry, Inorganic & Nuclear
Ah Dhahri, Y. Moualhi, C. Henchiri, A. Benali, P. Sanguino, M. P. F. Graca, M. A. Valente, N. Abdelmoula, H. Rahmouni, B. F. O. Costa
Summary: In this study, the La0.67Ca0.2Ba0.13Fe0.97Ti0.03O3 perovskite structure was prepared using the auto combustion method. The morphologic and elastic properties of the compound were analyzed using electron microscopy and Raman spectroscopy techniques. The compound exhibited similar vibration modes to LaFeO3 structure and showed semiconductor behavior with significant contribution from grain boundaries to its electrical properties.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Polymer Science
Guillaume Pillet, Pascal Puech, Sebastien Moyano, Frederic Neumayer, Wolfgang Bacsa
Summary: The conductivity of thermoplastic polymers can be effectively enhanced by incorporating carbon nanotubes on the surface. Multiwall carbon nanotubes thin films were transferred onto the polymer surface to form composite layers with electrical conductivity up to 8 S/cm, showing variations at 2.8 vol% of nanotubes. The distribution and quantity of nanotubes were studied using transmission electron microscopy and optical transmission measurements.
Article
Materials Science, Multidisciplinary
Chao Liu, Tielong Shen, Cunfeng Yao, Hailong Chang, Kongfang Wei, Lijuan Niu, Zhiwei Ma, Zhiguang Wang
Summary: The study found that a Si modified steel SIMP exhibited better oxidation resistance compared to T91 in 500 degrees C steam with a flow rate of 5 m/s, and the oxidation rate was significantly enhanced at relatively low dissolved oxygen levels. This suggested that not only alloy composition and dissolved oxygen, but also the flow rate, played important roles in the corrosion behavior of ferritic-martensitic steels.
Article
Biochemical Research Methods
Michael Foster, William Brooks, Philipp Jahn, Jesper Hedberg, Andreas Andersson, And Lorna Ashton
Summary: This paper introduces a new deep UV Raman instrument that can provide high specificity and accuracy for biopharmaceutical products, with the potential for online measurement.
JOURNAL OF BIOPHOTONICS
(2022)
Article
Materials Science, Ceramics
Julie Simeon, Florent Lebreton, Laure Ramond, Philippe Martin, Doris Drouan, Catherine Sabathier, Guillaume Bernard-Granger
Summary: The microstructure of a 98.7% dense U0.856Pu0.144O1.993 sintered sample has been characterized by electron probe microanalysis, Raman spectroscopy, and transmission electron microscopy. Results from Raman spectroscopy and electron probe microanalysis are comparable in studying the spatial distribution of plutonium in a homogeneous sintered MOX fuel. Transmission electron microscopy provides additional characterizations for investigating the chemical homogeneity of sintered MOX fuels, revealing variations in the Pu/(U+Pu) content at the scale of elementary grains.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2022)
Article
Chemistry, Physical
Nadezhda Kirik, Alexander Krylov, Andrey Boronin, Sergey Koshcheev, Leonid Solovyov, Evgenii Rabchevskii, Nina Shishkina, Alexander Anshits
Summary: This paper investigates the relationship between the structural features of hematite samples and their reactivity towards hydrogen in the temperature-programmed reaction (TPR-H-2) after calcination at temperatures ranging from 800 to 1100 °C. The reactivity of the samples decreases as the calcination temperature increases. Various techniques, including X-ray Diffraction (XRD), Scanning Electron Microscopy (SEM), X-ray Photoelectron Spectroscopy (XPS), and Raman Spectroscopy, were used to analyze the textural characteristics of the calcined samples. The results indicate that the calcined hematite samples mainly consist of the α-Fe2O3 phase, with an increase in crystal density and a decrease in the proportion of smaller particles on the surface as the calcination temperature rises.
Article
Biochemistry & Molecular Biology
Maria Pachetti, Francesco D'Amico, Luisa Zupin, Stefania Luppi, Monica Martinelli, Sergio Crovella, Giuseppe Ricci, Lorella Pascolo
Summary: This study aimed to use UV resonance Raman spectroscopy to monitor molecular modifications in nucleic acids and support the selection of high-quality sperm samples in ART. The results suggest that UVRR can be utilized as an inexpensive tool for semen quality assessment.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Materials Science, Ceramics
N. A. Wojcik, N. S. Tagiara, S. Ali, K. Gornicka, H. Segawa, T. Klimczuk, B. Jonson, D. Moncke, E. I. Kamitsos
Summary: Glass-ceramics in the xBeO-20Fe2O3-(80-x)TeO2 system with x = 0-25 mol% were synthesized and studied. The addition of BeO supported the crystallization of Fe2O3 during melting, resulting in an increase in the crystalline Fe2O3 phase and crystallite size with higher BeO content. Samples doped with BeO exhibited enhanced polymerization of the residual tellurite glass network compared to undoped samples, and all synthesized materials showed spin-glass behavior. Additionally, the Morin transition of hematite at 260 K was observed, with the intensity depending on Fe2O3 content and correlating with the amount of added BeO.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Vaikundamoorthy Ramalingam, Harshavardhan Mohan, Inho Hwang
Summary: In this study, a reduced graphene oxide (RGO) decorated with monodisperse superparamagnetic Fe3O4 (RGO-IO) nanocomposite was successfully prepared and confirmed through various spectroscopic and microscopic techniques. The nanocomposite exhibited good dispersibility and homogenous composition, as well as excellent electrochemical performance. It showed low cytotoxicity and promoted cellular growth. Moreover, the nanocomposite induced the formation of muscle cells and adipocytes, and upregulated the expression of marker proteins. This study is of great significance for the application of nanomaterials in tissue engineering and regenerative medicine.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
E. Thenmozhi, M. Harshavardhan, S. Kamala-Kannan, V Janaki
Summary: A shell-type mesoporous silica-manganese dioxide (MPS-(MnO2)) nanocomposite was prepared and studied for its photodegradation of Methylene blue (MB) in synthetic solution under visible light. SiO2 doping was found to decrease the band gap of MnO2, increasing the visible light absorption. Under optimized conditions, MPS-(MnO2) efficiently degraded 89.4% of MB from the synthetic solution.
Article
Materials Science, Multidisciplinary
Suhwan Yoo, Harshavardhan Mohan, Hyeon Seung Oh, Gitae Kim, Jae R. Hahn, Taeho Shin
Summary: The synthesized Pd@PdS core shell nanocubes demonstrated high efficiency in degrading methylparaben, attributed to enhanced light absorption and charge transfer at the core-shell interface.
Article
Chemistry, Applied
G. Dileep Kumar, Bandi Siva, K. Ashwini, J. Vinod Kumar, V Ramalingam, A. Sai Balaji, K. Suresh Babu
Summary: In this study, furan-conjugated aloe-emodin derivatives were synthesized and evaluated for their anticancer and anti-inflammatory activities. The results showed that most of the derivatives exhibited potent anticancer activity, especially compounds 5a and 5e. Additionally, compounds 5b, 5c, 5i, and 5j showed excellent anti-inflammatory activity.
NATURAL PRODUCT RESEARCH
(2023)
Article
Environmental Sciences
Ga Hyeon Ha, Harshavardhan Mohan, Hyeon Seung Oh, Gitae Kim, Kamala-Kannan Seralathan, Taeho Shin
Summary: The widespread use of antibiotics has led to their continuous release and presence in the ecosystem, resulting in the emergence of antibiotic-resistant bacteria in aquatic environments. In this study, Ag/Ag2S@BiOI nanowires were synthesized and used as photocatalysts for the degradation of a model antibiotic, tetracycline. The nanowires showed efficient degradation performance under optimal conditions and exhibited negligible toxicity towards cells, indicating their potential as promising photocatalysts.
Article
Chemistry, Multidisciplinary
Harshavardhan Mohan, Natesan Karthi, Pavithra Muthukumar Sathya, Vaikundamoorthy Ramalingam, Srivalli Thimmarayan, Mohammad Amjad Hossain, Adithan Aravinthan, Taeho Shin
Summary: This study synthesized (Zn, Ni)-ferrite nanoparticles using a chemical co-precipitation method and evaluated their cytotoxicity and osteogenic properties. The results showed that these nanoparticles had low toxicity and could potentially be used as biomaterials in regenerative medicine.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Chemistry, Applied
Swarna Kumari Gaja, Siva Bandi, Pavan Kumar Pavuluri, Shainy Sambyal, Vinod Kumar Jaina, H. M. Sampath Kumar, Sai Balaji Andugulapati, V Ramalingam, K. Suresh Babu
Summary: Piscidinol A (1) isolated from Aphanamixis polystachya showed modest anticancer activity. Analogues were synthesised and tested for their anticancer potential. Compounds 6e and 6i demonstrated significant anticancer activity against DU145 prostate cancer cells, inducing cell cycle arrest and late apoptosis.
NATURAL PRODUCT RESEARCH
(2023)
Article
Chemistry, Applied
Kummari Narendar, Punnam Mandha Chander, Chowdary Abhisheik Eedara, Sai Balaji Andugulapati, Vaikundamoorthy Ramalingam, K. SureshBabu, P. Vijayachari
Summary: By introducing aryl functionalities and amino acids, lupeol derivatives exhibited potent anticancer activity against MCF7 cells, regulating cell cycle and apoptosis, and inhibiting BcL2 expression while increasing Bax protein expression.
NATURAL PRODUCT RESEARCH
(2022)
Article
Chemistry, Physical
Harshavardhan Mohan, Sethumathavan Vadivel, Manabu Fujii, Ga Hyeon Ha, Gitae Kim, Hye Rin Lee, Taeho Shin
Summary: In this study, a nanocomposite of PdS nanodisks coupled on self-assembled Nb2O5 superstructures was prepared and shown to be an efficient photocatalyst for water splitting, producing oxygen and hydrogen. Various characterization techniques were used to compare the physical and chemical properties and advantages of the nanocomposite with bare Nb2O5 superstructure and PdS nanoparticles. The synthesized nanocomposite exhibited a hydrogen evolution rate of 665 μmol g(-1) min(-1) and an oxygen evolution rate of 211 μmol g(-1) min(-1), which is twice and three times higher, respectively, than that of Nb2O5 superstructure and PdS nanoparticles. The composite remained structurally intact even after six treatment cycles, indicating its practical applicability.
Article
Biochemistry & Molecular Biology
Vaikundamoorthy Ramalingam, Krishnamoorthy Varunkumar, Vilwanathan Ravikumar, Rajendran Rajaram
Summary: The present study investigates the effect and molecular mechanism of N-(2-hydroxyphenyl)-2-phenazinamine (NHP) from Nocardiopsis exhalans on human lung cancer cells. NHP exhibits excellent cytotoxic activity against A549 and H520 lung cancer cells at a concentration of 75 μg/mL, damaging the mitochondrial membrane and nucleus through oxidative stress. NHP causes nuclear condensation, induces apoptosis, down-regulates oncogenic genes, and upregulates apoptosis marker genes in lung cancer cells. NHP may have potential as an anticancer drug for lung cancer treatment.
CHEMICO-BIOLOGICAL INTERACTIONS
(2023)
Article
Environmental Sciences
Harshavardhan Mohan, Ga Hyeon Ha, Gitae Kim, Hye Rin Lee, Hakju Lee, Kyoungsoo Kim, Taeho Shin
Summary: The renewability and zero carbon emissions of hydrogen make it a promising clean energy resource. Photocatalytic water-splitting, despite its low efficiency, has been extensively researched for hydrogen production. In this study, bimetallic transition metal selenides were synthesized and evaluated for their photocatalytic water splitting efficiencies. Among the compounds tested, CMSc exhibited the highest hydrogen evolution rate and also showed great potential in degrading pollutants. Thus, CMSc can be identified as a highly efficient photocatalyst for both environmental and energy applications.
Article
Materials Science, Multidisciplinary
Sethumathavan Vadivel, Bappi Paul, Harshavardhan Mohan
Summary: In this study, a one-dimensional iron oxychloride (FeOCl) needles embedded on the surface of Bi5O7Br squares were successfully synthesized to form a core-shell structured FeOCl/Bi5O7Br heterojunction. Various analytical techniques confirmed the successful formation of core-shell FeOCl/Bi5O7Br nanocrystals. The core-shell structure significantly improved visible light absorption and charge separation efficiency, leading to enhanced photocatalytic degradation of tetracycline under visible light.
Article
Environmental Sciences
Julieta Celeste Martin Tempestti, Harshavardhan Mohan, Pavithra Muthukumar Sathya, Se-Won Lee, Janaki Venkatachalam, Byung-Taek Oh, Kamala-Kannan Seralathan
Summary: In this study, Enterococcus gallinarum (JT-02) was isolated and identified from animal farm waste sludge, showing the ability to biodegrade p-nitrophenol (PNP). The optimal conditions for PNP biodegradation by strain JT-02 were determined through single-factor experiments. It was found that the best setups included PNP concentration of 100 mg/L, pH 7, temperature of 30 degrees C, agitation speed of 150 rpm, and inoculum dose of 3% (v/v). Under these conditions, the bacteria degraded 98.21% of PNP within 4 days. The intermediates produced during PNP biodegradation were identified using High Performance Liquid Chromatography (HPLC) analysis, and the biodegradation pathway was elucidated. Phytotoxicity studies with Vigna radiata seeds confirmed the applicability and efficiency of PNP biodegradation.
ENVIRONMENTAL RESEARCH
(2023)
Review
Pharmacology & Pharmacy
Vaikundamoorthy Ramalingam
Summary: NLRP3 inflammasome plays an important role in inflammatory responses, but its inhibitors have severe side effects, limiting their successful clinical application.
BIOCHEMICAL PHARMACOLOGY
(2023)
Article
Biochemistry & Molecular Biology
Karthi Natesan, Thimmarayan Srivalli, Harshavardhan Mohan, Arul Jayaprakash, Vaikundamoorthy Ramalingam
Summary: Investigation of phytochemicals and bioactive molecules in Acer mono sap revealed its excellent antioxidant activity, cell proliferation effect, and osteogenic potential. The identified compounds in the sap have significant biomedical applications, and their use in bone regeneration and bone loss-associated diseases such as osteoporosis is promising.
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)
