Article
Engineering, Chemical
Tomas F. Babuska, John F. Curry, Michael T. Dugger, Morgan R. Jones, Frank W. DelRio, Ping Lu, Yan Xin, Tomas Grejtak, Robert Chrostowski, Filippo Mangolini, Nicholas C. Strandwitz, Md Istiaque Chowdhury, Gary L. Doll, Brandon A. Krick
Summary: This study investigates the relationship between density, hardness, friction, and wear for pure molybdenum disulfide coatings. The results show that dense films have a wear rate 100 times lower than porous coatings, and high density pure MoS2 coatings demonstrate better tribological performance than composite coatings.
Article
Nanoscience & Nanotechnology
Aristide Djoulde, Mengfan He, Xinyue Liu, Lingdi Kong, Pengfei Zhao, Jinjun Rao, Jinbo Chen, Lingjun Meng, Zhiming Wang, Mei Liu
Summary: We explored the electrical activity and extremes inside individual suspended ZnO nanowires and observed high electrical resistivity and electron density. We also discovered thermal breakdown due to Joule heating and investigated the temperature distribution and thermal conductance. This work provides valuable insights into the potential and limitations of suspended NWs in high-performance nanodevices.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Soham Das, Spandan Guha, Ranjan Ghadai, Ashis Sharma, Saikat Chatterjee
Summary: Titanium Nitride (TiN) thin films were deposited on Si (100) substrate by thermal chemical vapor deposition process (CVD) at different substrate temperatures. The morphological, mechanical, and structural properties of the TiN films were characterized using SEM, AFM, Nanoindentation, and XRD techniques. The results showed that higher deposition temperature led to the presence of agglomerated particles on the surface and increased surface roughness. Electrochemical analysis indicated a decrease in corrosion resistance with increasing process temperature. Nanoindentation analysis confirmed that TiN coating synthesized at 1150 degrees C exhibited the highest fracture toughness, hardness, and Young's modulus. Different models were used for the comparative analysis of the structural properties of TiN coatings. Origin 9.0 software was used for data analysis.
Article
Materials Science, Multidisciplinary
Hui-Ping Cheng, Phuoc Huu Le, Le Thi Cam Tuyen, Sheng-Rui Jian, Yu-Chen Chung, I-Ju Teng, Chih-Ming Lin, Jenh-Yih Juang
Summary: The correlations among microstructure, surface morphology, hardness, and elastic modulus of Bi2Te3 thin films deposited on c-plane sapphire substrates by pulsed laser deposition are investigated. The results show that the crystallinity of the films can be improved by increasing the substrate temperature. The hardness and elastic modulus of the films decrease with increasing crystallite size, and the grain boundary plays an important role in the deformation characteristics of the films.
Article
Chemistry, Analytical
Guo-Ju Chen, Chih-Ming Lin, Yung-Hui Shih, Sheng-Rui Jian
Summary: The influence of substrate temperature on the structural, surface morphological, optical, and nanomechanical properties of NiO films deposited through radio-frequency magnetron sputtering on glass substrates was investigated. Results showed that the substrate temperature significantly affected the grain texturing, surface morphology, transmittance, optical band gap, hardness, Young's modulus, and wettability of the films.
Article
Engineering, Multidisciplinary
Pavel Seredin, Dmitry Goloshchapov, Vladimir Kashkarov, Anna Emelyanova, Nikita Buylov, Konstantin Barkov, Yuri Ippolitov, Tatiana Khmelevskaia, Iman A. Mahdy, Manal A. Mahdy, Tatiana Prutskij
Summary: This report demonstrates the formation of a biomimetic mineralizing layer on the surface of dental enamel using a bioinspired nanocrystalline carbonate-substituted calcium hydroxyapatite (ncHAp) and a complex of polyfunctional organic and polar amino acids. The study confirms the formation of a nanosized ncHAp-based mineralized layer and investigates its chemical, substructural, and morphological features using various techniques. The research shows that the pretreatment and subsequent mineralization result in the homogeneous crystallization of hydroxyapatite on the enamel surface, increasing its nanohardness value.
Article
Materials Science, Ceramics
Ferhunde Atay, Orkun Gultepe
Summary: This study evaluated the photocatalytic performance of ZnO films and found that increasing the spinning cycle can improve their optical, surface, and structural properties, thus enhancing photocatalytic activity.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
N. L. Tarwal, D. P. Mali, K. V. Patil, S. L. Patil, V. L. Patil, V. B. Patil, C. C. Revadekar, T. D. Dongale, P. S. Patil, P. M. Shirage, J. H. Jang
Summary: In this study, nanostructured ZnO thin films were deposited on glass/FTO substrates using a simple and cost-effective spray pyrolysis technique. The structural and compositional properties of the deposited films were investigated, and it was found that they exhibited a crystalline nature with nanoflakes-like morphology. The bipolar resistive switching properties of the fabricated memristive devices were also studied, and it was observed that they showed non-ideal memristor behavior. Additionally, the ZnO-based memristive devices exhibited good non-volatile memory properties and reliable device performance.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Ivana O. Mladenovic, Jelena S. Lamovec, Dana G. Vasiljevic-Radovic, Rastko Vasilic, Vesna J. Radojevic, Nebojsa D. Nikolic
Summary: The study investigated the influence of different electrolysis parameters on the morphology, structure, and hardness of copper coatings, revealing two types of Cu coatings with varying hardness. A critical relative indentation depth was established for all types of Cu coatings.
Article
Materials Science, Multidisciplinary
O. Gultepe, F. Atay
Summary: This study aimed to improve the properties of pure-ZnO films for photovoltaic and photocatalytic applications by incorporating Al element. ZnO and ZnO:Al films were economically produced by the solgel spin coating technique. The results showed that Al doping process led to an increase in the photocatalytic degradation efficiency and conductivity of the films.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Engineering, Mechanical
David C. Roache, Clifton H. Bumgardner, Yunya Zhang, David Edwards, David DeGonia, Bryan Rock, Xiaodong Li
Summary: Wear reduction is critical in the automotive industry, and the generation of tribofilms by additive-infused lubricants has been effective in reducing wear. The progress of ashless tribofilms offers a promising solution for better protection. Phosphorus and sulfur content are well correlated with wear performance, with higher phosphorus and lower sulfur offering better protection. Higher elastic modulus is also strongly correlated with better wear performance.
TRIBOLOGY INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Pawan Kumar, Nisha, Prosenjit Sarkar, Sachin Singh, B. C. K. Mishra, Ram S. Katiyar
Summary: ZnO thin films were deposited on ITO coated glass substrate using the pulsed laser deposition technique at different annealing temperatures. The topological structure and optical properties of the films were affected by the post-annealing process, as confirmed by AFM and UV-Vis spectroscopy. Raman spectroscopy and XRD were used to confirm the presence of ZnO material. Surface roughness was slightly affected by annealing temperature. The calculated optical bandgap showed a decrease and then an increase with increasing annealing temperatures. The surface roughness of the ZnO thin films was associated with variations in the optical bandgap, suggesting the significant impact of post-growth annealing.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Jin-Kyu Jang, Yun-Je Park, Yeon-Hak Lee, Jae-Wook Choi, Hyun-Jin Kim, Sung-Bo Heo, Young -Min Kong, Daeil Kim
Summary: In this study, transparent and conductive ZnO/Au/ZnO tri-layer films were deposited on poly-imide films using RF and DC magnetron sputtering. The effect of electron irradiation on the films was investigated. The results showed that electron irradiation improved the surface flatness, grain size, and optical properties of the films. At an electron irradiation energy of 900 eV, the films exhibited higher visible transmittance, lower sheet resistance, and higher figure of merit.
KOREAN JOURNAL OF METALS AND MATERIALS
(2022)
Article
Chemistry, Physical
Rajan Kumar, Ravi Kumar Dwivedi, Siraj Ahmed
Summary: The study investigated different heat-treatment processes to achieve carbide-free bainite in high silicon spring steel, and analyzed the wear rate of base and treated samples using pin-on-disc testing. Retained austenite plays a vital role in resisting crack initiation and propagation during deformation, enhancing wear resistance and hardness of treated samples. The effect of retained austenite fraction and carbon content on specific wear rate was systematically studied using X-ray diffraction, atomic force microscopy, and scanning electron microscopy.
Article
Physics, Condensed Matter
Sugandha Sharma, Monika Tomar, Vinay Gupta, Avinashi Kapoor
Summary: Thin films of cadmium-incorporated ZnO have been synthesized and investigated for light detecting applications, showing high mobility and excellent photosensitivity. The effect of cadmium incorporation on the microstructural and electrical properties of ZnO was comprehended, with CZO films exhibiting nonlinear I-V curves and high responsivity in response to UV light source.
SUPERLATTICES AND MICROSTRUCTURES
(2021)
Article
Chemistry, Analytical
Yeong-Maw Hwang, Cheng-Tang Pan, Ying-Xu Lu, Sheng-Rui Jian, Huang-Wei Chang, Jenh-Yih Juang
Article
Materials Science, Multidisciplinary
Yeong-Maw Hwang, Cheng-Tang Pan, Bo-Syun Chen, Phuoc Huu Le, Ngo Ngoc Uyen, Le Thi Cam Tuyen, Vanthan Nguyen, Chih-Wei Luo, Jenh-Yih Juang, Jihperng Leu, Sheng-Rui Jian
Article
Materials Science, Multidisciplinary
Yeong-Maw Hwang, Cheng-Tang Pan, Bo-Syun Chen, Sheng-Rui Jian
Summary: Three-dimensional simulations of the ultrasonic vibration bonding process of micro-copper blocks were conducted using the finite element method, showing successful bonding at room temperature and the formation of solid solution characteristics at higher frequencies.
Article
Chemistry, Multidisciplinary
Yu-Chin Tseng, Chih-Ming Lin, Sheng-Rui Jian, Phuoc Huu Le, Marin M. Gospodinov, Vera Marinova, Dimitre Z. Dimitrov, Chih-Wei Luo, Kuang-Hsiung Wu, Dong-Zhou Zhang, Jenh-Yih Juang
Summary: The evolution of Bi2Se2.1Te0.9 driven by external pressure revealed new crystal structures appearing sequentially, with electronic and structural properties influenced by the alloying of Bi2Se3 with Bi2Te3.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Chemistry, Multidisciplinary
Chih-Ming Lin, Sin-Cheng Lin, Yu-Chin Tseng, Tony Huang, Huan-Hsuan Kung, Yu-Chun Chuang, Yen-Fa Liao, Bi-Ru Wu, Sheng-Rui Jian, Jenh-Yih Juang
Summary: The study revealed that under pressure, zinc-doped indium phosphide undergoes phase transitions from zinc-blende to rock-salt structure with metallization, while additional Raman shifts of Zn local vibrational modes appear. The pressure-induced phase transitions in zinc-doped indium phosphide are found to be influenced by the type of defects introduced into the lattice upon doping.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Materials Science, Multidisciplinary
Hou-Guang Chen, Yung-Hui Shih, Huei-Sen Wang, Sheng-Rui Jian, Tzu-Yi Yang, Shu-Chien Chuang
Summary: In this article, the van der Waals epitaxial growth of ZnO layers on mica substrates is demonstrated through a low-temperature hydrothermal process. The addition of sodium citrate into the growth solution significantly promotes the lateral growth of ZnO crystallites, resulting in coalesced and continuous epitaxial layers. The combination of Mist-CVD process further improves the epitaxial quality and surface morphology of the hydrothermally grown ZnO layers.
Article
Engineering, Multidisciplinary
Yi-Jui Chiu, Bi Li, Sheng-Rui Jian, Shui-Yang Lien, Ji-Ming Yi
Summary: This paper improves the theoretical model of photovoltaic power generation based on experimental data to enhance the prediction accuracy. The influence of photovoltaic module characteristics and local shading on power generation efficiency is analyzed through MATLAB simulations. Furthermore, an improved PSO algorithm is proposed to solve the maximum power point tracking problem under local shading, achieving faster power tracking and improved stability compared to existing algorithms.
JOURNAL OF THE CHINESE INSTITUTE OF ENGINEERS
(2022)
Article
Materials Science, Multidisciplinary
Kuo-Jung Lee, Ming-Husan Lee, Yung-Hui Shih, Chao-Ping Wang, Hsun-Yu Lin, Sheng-Rui Jian
Summary: This study focuses on the fabrication of carbon nanotube buckypaper composite films using pumping filtration and spin coating methods. The addition of surface modifiers improves the hydrophilic properties of the buckypaper and enhances its bonding with aqueous bovine serum albumin (BSA). The contact angles of the modified specimens are smaller than the unmodified specimen, indicating the improved hydrophilicity of the modified samples.
Article
Materials Science, Multidisciplinary
Hui-Ping Cheng, Phuoc Huu Le, Le Thi Cam Tuyen, Sheng-Rui Jian, Yu-Chen Chung, I-Ju Teng, Chih-Ming Lin, Jenh-Yih Juang
Summary: The correlations among microstructure, surface morphology, hardness, and elastic modulus of Bi2Te3 thin films deposited on c-plane sapphire substrates by pulsed laser deposition are investigated. The results show that the crystallinity of the films can be improved by increasing the substrate temperature. The hardness and elastic modulus of the films decrease with increasing crystallite size, and the grain boundary plays an important role in the deformation characteristics of the films.
Article
Chemistry, Physical
Yu-Min Hu, Zheng-Da Li, Chin-Hau Chia, Jau-Wen Chiou, Ying-Yen Liao, Chin-Chung Yu, Tai -Chun Han, Sheng-Rui Jian, Jenh-Yih Juang
Summary: Recently, the resistive switching and room-temperature ferromagnetism exhibited in copper oxide films and nanostructures have attracted extensive interest. This study investigates the properties of different copper oxide films deposited under different atmospheric conditions, providing insights into the origin and mechanisms of these phenomena.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Shu-Wei Cheng, Bo-Syun Chen, Sheng-Rui Jian, Yu-Min Hu, Phuoc Huu Le, Le Thi Cam Tuyen, Jyh-Wei Lee, Jenh-Yih Juang
Summary: In this study, the nanoindentation responses of Bi2Se3 thin film were quantitatively analyzed and simulated using the finite element method (FEM). The study also investigated the geometric shape dependency of nanoindentation-induced stress distribution at the film/substrate interface.
Article
Chemistry, Analytical
Guo-Ju Chen, Chih-Ming Lin, Yung-Hui Shih, Sheng-Rui Jian
Summary: The influence of substrate temperature on the structural, surface morphological, optical, and nanomechanical properties of NiO films deposited through radio-frequency magnetron sputtering on glass substrates was investigated. Results showed that the substrate temperature significantly affected the grain texturing, surface morphology, transmittance, optical band gap, hardness, Young's modulus, and wettability of the films.
Article
Materials Science, Multidisciplinary
Ngo Ngoc Uyen, Le Thi Cam Tuyen, Le Trung Hieu, Thi Thu Tram Nguyen, Huynh Phuong Thao, Tho Chau Minh Vinh Do, Kien Trung Nguyen, Nguyen Thi Nhat Hang, Sheng-Rui Jian, Ly Anh Tu, Phuoc Huu Le, Chih-Wei Luo
Summary: In this study, TiO2 nanowires on TiO2 nanotubes arrays and Au-decorated nanostructures were designed for photoelectrochemical water splitting. Among them, Au NPs-NRs-TNWs/TNAs exhibited the highest photocurrent density and photocatalytic activity in the degradation of methylene blue.
Article
Chemistry, Analytical
Chih-Sheng Gao, Sheng-Rui Jian, Phuoc Huu Le, Wu-Ching Chou, Jenh-Yih Juang, Huang-Wei Chang, Chih-Ming Lin
Summary: In this study, samarium-doped BiFeO3 thin films were grown using pulsed laser deposition and their microstructures and nanomechanical properties were investigated. The results showed that the oxygen partial pressure influenced the surface morphology and crystallite size of the films. Additionally, the hardness of the films followed the Hall-Petch equation.
Article
Materials Science, Multidisciplinary
Hou-Guang Chen, Huei-Sen Wang, Sheng-Rui Jian, Tung-Lun Yeh, Jing-Yi Feng
Summary: This study demonstrates the successful epitaxial growth of single-phase (111) CoO and (111) Co3O4 thin films on a-plane sapphire substrates using mist-CVD process. The phase structure of the cobalt oxide films is controlled by the growth temperature and process ambient. The electrical properties of the Co3O4 films are greatly improved after thermal annealing in oxygen ambient.
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)
