Article
Physics, Applied
Jana Rehm, Ta-Shun Chou, Saud Bin Anooz, Palvan Seyidov, Andreas Fiedler, Zbigniew Galazka, Andreas Popp
Summary: This study provides an overview of the applications of MOVPE-grown (100) beta-Ga2O3 thin films in high-power electronics and discusses the challenges faced. Through analyzing the structural defect formation mechanism, substrate treatment strategies, and growth windows, the grown film was optimized to meet the requirements for device fabrication. Furthermore, this study proposes strategies for future growth process optimization.
APPLIED PHYSICS LETTERS
(2022)
Article
Chemistry, Physical
Yu Pei, Lingyan Liang, Xiaolong Wang, Zhenhua Wang, Hengbo Zhang, Junyan Ren, Hongtao Cao
Summary: By using seed-induced engineering, crystalline Ga2O3 material was successfully prepared at a lower processing temperature, showing promising performance in solarblind photodetectors.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Tuo Sheng, Xing-Zhao Liu, Ling-Xuan Qian, Bo Xu, Yi-Yu Zhang
Summary: Metal-semiconductor-metal solar-blind ultraviolet photoconductors based on beta-Ga2O3 thin films were fabricated and the effects of annealing on their characteristics and photoconductivity were studied. Higher annealing temperature resulted in lower crystalline quality and device photoresponsivity. The vacuum-annealed sample showed the highest photoresponsivity and the oxygen-annealed sample effectively suppressed persistent photoconductivity.
Article
Materials Science, Multidisciplinary
Shan Li, Jianying Yue, Xueqiang Ji, Chao Lu, Zuyong Yan, Peigang Li, Daoyou Guo, Zhenping Wu, Weihua Tang
Summary: By introducing a post-annealing method, the performance of ε-Ga2O3 photodetectors was improved by enhancing film quality and modulating V-O defect concentration. Through regulating V-O concentration, crucial parameters of the devices were significantly improved, leading to higher performance in terms of photo-to-dark current ratio and responsivity.
JOURNAL OF MATERIALS CHEMISTRY C
(2021)
Article
Engineering, Electrical & Electronic
Maria Isabel Pintor-Monroy, Martin Gregorio Reyes-Banda, Carlos Avila-Avendano, Manuel A. Quevedo-Lopez
Summary: In this study, a simple and cost-effective method for fabricating thin film transistors (TFTs) based on undoped amorphous Ga2O3 thin films deposited at room temperature by magnetron sputtering is discussed. The control of Ga2O3 thin film resistivity over a wide range is demonstrated by controlling the deposition power and pressure. These TFTs exhibit promising characteristics and have been evaluated as phototransistors under DUV radiation, showing high rejection ratio, responsivity, gain, detectivity, and photosensitivity.
IEEE SENSORS JOURNAL
(2021)
Article
Chemistry, Physical
Xiao Hu Lv, Zhan Hua Li, Yuan Shen Qi, Tooru Tanaka, Qi Xin Guo, Kin Man Yu, Chao Ping Liu
Summary: Amorphous p-type transparent (Ga2O3)1-x(Cu2S)x alloy thin films with x<-0.5 have been successfully synthesized by magnetron sputtering at room temperature in this study. The optical bandgap decreases from -4.8 eV to -2.5 eV with increasing x, while the hole concentration N increases from 1019 cm-3 to -2 x 1021 cm-3, with a hole mobility of -0.3 cm2 V-1 s-1. The hole transport in these amorphous alloys follows the variable-range-hopping mechanism in the temperature range of 120-300 K. The upshift of the valence band maximum (VBM) position by -3 eV with x > 0.2 enhances the p-type conductivity of the films. These amorphous p-type transparent (Ga2O3)1-x(Cu2S)x alloy thin films show potential significance in bipolar device applications, such as Ga2O3 based p-n heterojunction power devices and high-efficiency solar cells.
APPLIED SURFACE SCIENCE
(2023)
Article
Physics, Applied
Zhenni Yang, Xiangyu Xu, Yan Wang, Siliang Kuang, Duanyang Chen, Hongji Qi, K. H. L. Zhang
Summary: Si-doped beta-Ga2O3 thin films grown on vicinal a-Al2O3 (0001) substrates exhibit high electrical conductivity and deep ultraviolet (DUV) transparency, making them promising candidates for transparent electrodes. The use of miscut Al2O3 substrates promotes improved crystal quality and electrical properties. The Si-doped films achieved a high conductivity of 37 S cm(-1) and average DUV transparency of 85% on a 6 degrees miscut substrate. The films also exhibit low work function, making them suitable for efficient electron injection in DUV optoelectronic devices.
APPLIED PHYSICS LETTERS
(2023)
Article
Engineering, Electrical & Electronic
Hiroyuki Nishinaka, Tatsuji Nagaoka, Yuki Kajita, Masahiro Yoshimoto
Summary: Utilizing mist chemical vapor deposition (CVD) process, rapid homoepitaxial growth of beta-Ga2O3 thin films with smooth surfaces was achieved using a concentrated aqueous solution of GaCl3 precursor.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2021)
Article
Engineering, Multidisciplinary
Liu Zeng, Zhi YuSong, Zhang ShaoHui, Li Shan, Yan ZuYong, Gao Ang, Zhang ShiYu, Guo DaoYou, Wang Jun, Wu ZhenPing, Li PeiGang, Tang WeiHua
Summary: In this study, beta-Ga2O3 thin films were prepared using metal-organic chemical vapor deposition to construct planar Ti/β-Ga2O3/Ni Schottky photodiode detectors with varying on-state resistances. The devices demonstrated state-of-the-art performances with high responsivity, detectivity, and quantum efficiency, showing a dependence on the on-state resistance for optimal performance.
SCIENCE CHINA-TECHNOLOGICAL SCIENCES
(2021)
Article
Physics, Condensed Matter
Amit Kumar Singh, Mukul Gupta, V Sathe, Y. S. Katharria
Summary: Gallium oxide (Ga2O3) films were deposited using RF magnetron sputtering on quartz and n-type Si (100) substrates at room temperature, and the effect of annealing temperature on the crystalline structure and band gap of beta-Ga2O3 thin films was investigated. Monoclinic polycrystalline thin films were formed, with a bandgap estimated in the range of 4.75 eV-5.15 eV. Raman spectra showed shifts in Ga2O3 phonon modes, and absorption bands at 647.05 cm(-1) due to vibrations of Ga-O bonds were identified through Fourier-transform infrared spectroscopy.
SUPERLATTICES AND MICROSTRUCTURES
(2021)
Article
Crystallography
Ta-Shun Chou, Saud Bin Anooz, Raimund Grueneberg, Klaus Irmscher, Natasha Dropka, Jana Rehm, Thi Thuy Vi Tran, Wolfram Miller, Palvan Seyidov, Martin Albrecht, Andreas Popp
Summary: In this research, a hybrid deep-learning model (fDNN) was trained to predict the doping level in (100) and (010) beta-Ga2O3 thin films grown by MOVPE and investigate the doping behavior of Si dopant. The model revealed that the Si supplied per nm (mol/nm) had a dominant influence on the doping process. An empirical relation was concluded to estimate the doping level using the Si supplied per nm (mol/nm) as the primary variable. The results indicated the similarity of doping behavior between (100) and (010) beta-Ga2O3 thin films through MOVPE and the generality of the findings to different deposition systems.
Article
Engineering, Electrical & Electronic
Wei-Yu Jiang, Zeng Liu, Shan Li, Zu-Yong Yan, Cheng-Ling Lu, Pei-Gang Li, Yu-Feng Guo, Wei-Hua Tang
Summary: The Si-doped beta-Ga2O3 trench Schottky photodiode designed in this work functions as a dual-mode solar-blind ultraviolet sensor with high performance characteristics. It has the potential to be a self-powered photodetector and shows promise for ultraviolet solar-blind detection applications.
IEEE SENSORS JOURNAL
(2021)
Article
Physics, Applied
Jose Manuel Taboada Vasquez, Aasim Ashai, Yi Lu, Vishal Khandelwal, Manoj Rajbhar, Mritunjay Kumar, Xiaohang Li, Biplab Sarkar
Summary: In this study, a broadband UV photodetector using a p-type NiOx layer and an n-type beta-Ga2O3 heterostructure in PIN configuration is demonstrated for the first time. The optimized NiOx/beta-Ga2O3 PIN photodiode shows good responsivity to incident light wavelengths in the UV-A, UV-B, and UV-C regions. A highly resistive beta-Ga2O3 layer is required for UV-C light absorption, while the NiOx layer provides good photoresponsivity in UV-A and UV-B regions. The results suggest promising device design strategies for wide bandgap semiconductor-based broadband UV PIN photodetectors.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2023)
Article
Physics, Applied
A. F. M. Anhar Uddin Bhuiyan, Zixuan Feng, Lingyu Meng, Hongping Zhao
Summary: This tutorial summarizes the recent advances in the epitaxial growth of beta-Ga2O3 thin films using different growth methods, with a particular focus on the growth of Ga2O3 and its alloys by metalorganic chemical vapor deposition (MOCVD). The challenges in the epitaxial development of beta-Ga2O3 are discussed, along with the opportunities for improving device performance based on this emerging ultrawide bandgap semiconductor material system.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Multidisciplinary Sciences
David S. Knoche, Matthias Steimecke, Yeseul Yun, Lutz Muehlenbein, Akash Bhatnagar
Summary: This study investigates the evolution of bulk photovoltaic effect in BiFeO3 thin films under different polarization conditions, revealing anomalous characteristics in open-circuit voltages under circularly polarized light. Spatially-resolved Raman measurements further analyze the interaction between light and different domains.
NATURE COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Abuzer Acikgoz, Gokhan Demircan, Bulent Aktas, Serife Yalcin, Nuri Yorulmaz, Demet Yilmaz
Summary: The study investigated the impact of CeO2 and Er2O3 on the physical, structural, and mechanical properties of a B2O3-Na2O-Al2O3 glass composition. CeO2 and Er2O3 doping affected radiation shielding properties and optical properties, with 1 mol% Er2O3 showing a better reduction in reflectivity of gamma rays compared to 1 mol% CeO2. The structural and mechanical properties of the doped borate glasses were also examined and compared.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Engineering, Civil
Muge Albayrak, Daniel Willi, Sebastien Guillaume
Summary: This study determines the precision and accuracy of the QDaedalus system based on observations at two locations in Switzerland. The precision was found to be 0.1'' through extensive observations, while the accuracy was established through parallel observations and found to be within 0.1''. Notably, a large systematic trend was observed in the N-S DoV data at one of the test stations.
Article
Food Science & Technology
Hamza Alasalvar, Murat Kaya, Serap Berktas, Bulent Basyigit, Mustafa Cam
Summary: This study investigated the extraction of bioactive compounds from lemon peel using pressurised hot water extraction (PHWE). The results showed that PHWE at specific temperature and time conditions could selectively extract eriocitrin and hesperidin, resulting in higher total phenolic content and antioxidant capacities compared to conventional extraction methods.
INTERNATIONAL JOURNAL OF FOOD SCIENCE AND TECHNOLOGY
(2023)
Article
Engineering, Marine
Gokhan Demircan, Mustafa Ozen, Murat Kisa, Abuzer Acikgoz, Yusuf Isiker
Summary: This study investigated the effects of freeze-thaw test on glass fiber-reinforced epoxy composite coatings with nano-gelcoat. The mechanical properties and thermal stability of the coatings were examined through various tests and analyses. Results showed that the addition of nano TiO2 improved water absorption property and preserved mechanical properties. However, the presence of nanoclay reduced the protection property of the pure gelcoat. Statistical analysis confirmed the significance of the experimental results.
Article
Geography, Physical
Yunus Kaya, Halil Ibrahim Senol, Abdurahman Yasin Yigit, Murat Yakar
Summary: Determining car density in parking lots is crucial for executing existing management systems and making precise plans for the future. In this study, high-resolution UAV images and deep learning methods were used to detect cars in parking lots. Two deep learning approaches, YOLOv3 and Mask R-CNN, were tested using the deep learning tool of Esri ArcGIS Pro. The performance of the algorithms was evaluated based on metrics such as recall, F1 score, precision ratio/uncertainty accuracy, and average producer accuracy.
PHOTOGRAMMETRIC ENGINEERING AND REMOTE SENSING
(2023)
Article
Chemistry, Analytical
Fatih Turk, Abdullah Atilgan, Nimet Yildirim-Tirgil
Summary: Molecularly imprinted polymer (MIP) and DNA aptamers with the ability to detect targets with high sensitivity and specificity by simulating the structure and function of antibodies and biological receptors have been combined to create hybrid alternatives with enhanced attributes and desirable properties. A new method has been developed to produce aptamer/MIP hybrids for protein biomarkers that is simple and reproducible. Multi-walled carbon nanotubes (MWCNTs) were used to develop sensitive sensor/biosensors due to their outstanding chemical/mechanical stability. The MWCNTs/Aptamer/MIP system was characterized using various techniques and showed satisfactory results in terms of sensitivity, selectivity, stability, and practical analysis when tested with thrombin as a model peptide.
ANALYTICAL LETTERS
(2023)
Article
Environmental Sciences
Ibrahim Yenigun, Ali Volkan Bilgili, Halil Ibrahim Senol, Abdullah Yenigun
Summary: Underground water resources are vital for mankind, used for drinking water and agricultural irrigation. This study investigates the changes in groundwater quality in the Upper Mesopotamian region, which has a semi-arid climate and important past civilizations. Samples from selected wells in the Mardin Kiziltepe Plain were collected and analyzed for water quality classifications. The results show no non-standard values and will provide important data for future irrigation projects.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2023)
Article
Environmental Sciences
Inese Varna, Daniel Willi, Sebastien Guillaume, Muge Albayrak, Ansis Zarins, Mustafa Ozen
Summary: Nowadays, zenith telescope-based digital zenith cameras (DZC) are used to determine precise astrogeodetic deflections of the vertical (DoVs). CODIAC and VESTA, developed by ETH Zurich and University of Latvia respectively, are the most commonly used DZCs. This study conducted simultaneous observations using both CODIAC and VESTA at HEIG-VD in Yverdon-les-Bains, Switzerland, and revealed the precision and agreement between the two DZCs.
Article
Archaeology
Nizar Polat
Summary: This study used unmanned aerial vehicles (UAVs) to investigate ancient water collection and storage systems near the Karahantepe Neolithic Site. The use of digital elevation models (DEMs) allowed for the examination of cisterns, pools, and channels in the region. Hydrological analysis provided a comprehensive understanding of water flow patterns. The findings suggested that the channels leading to cisterns followed a meandering slope and culminated in pools, possibly serving as sedimentation ponds. The study highlighted the benefits of utilizing UAV technology in archaeology and inferred that the water collection and storage system in the region was intentionally constructed by ancient civilizations.
ENVIRONMENTAL ARCHAEOLOGY
(2023)
Article
Chemistry, Physical
Mehmet Fatih Dilekoglu, Mazlum Yapici
Summary: The research investigated the performance of a new method for synthesizing super activated carbon from sheep manure in the adsorption of the naproxen micropollutant. Chemical activation with ZnCl2 as an activator was used to produce activated carbon, with various parameters such as impregnation rate, activation temperature, and duration examined. Characterization of the produced activated carbons was done using FTIR, SEM, and BET measurements, with a surface area of 2170 m2 g-1 determined. The adsorption of naproxen was found to be influenced by solution pH, initial concentration, and the amount of activated carbon.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
Article
Engineering, Civil
Muge Albayrak, Sebastien Guillaume, Daniel Willi, Christian Hirt, Ivan Dario Herrera Pinzon, Urs Marti, M. Tevfik Ozludemir, Lukas Mueller, C. K. Shum
Summary: This study presents the results of an astrogeodetic survey campaign conducted in the mountainous terrain of the Surses region in Switzerland. The observations using the QDaedalus system validated DoV data from the CHGeo2004 model and showed that it is more accurate than the GGMplus model. Furthermore, a comparison with previous studies conducted in coastal and flat terrains revealed that the GGMplus model performs better in the mountainous terrain.
JOURNAL OF SURVEYING ENGINEERING
(2023)
Article
Engineering, Electrical & Electronic
A. Atilgan, K. Ozel, M. Sbeta, A. Yildiz
Summary: A fast and reliable method for constructing one-dimensional photonic crystals is proposed in this study. By adjusting the spin-coating speed and spin-acceleration time during the deposition, visible light absorption in the photonic crystals can be easily engineered. This method offers a potential alternative to current construction methods.
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2023)
Article
Physics, Condensed Matter
Aykut Arslan, Kenan Ozel, Abdullah Atilgan, Abdullah Yildiz
Summary: The luminescent solar concentrators (LSCs) are a promising solution to improve energy efficiency in buildings. These devices utilize semi-transparent glazing systems to harness solar radiation, and can be used in building-integrated photovoltaic systems or as interior furniture components. In this study, thin-film LSC devices were fabricated and characterized using different light guides containing Eosin Y, Safranin O dyes, and a two-dye mixture. The two-dye mixture LSC showed a higher power conversion efficiency of 0.22% under indoor illumination conditions, compared to single-dye LSCs. The study also investigated the dependence of external solar parameters on incident light power, with the two-dye mixture providing the best description. This research may guide the future use of two-dye mixture thin-film LSC devices for indoor applications.
PHYSICA B-CONDENSED MATTER
(2023)
Article
Surgery
Harun Gur, Onur Ismi, Yusuf Vayisoglu, Kemal Gorur, Murat Unal, Onurhan Guven, Cengiz Ozcan
Summary: This study retrospectively analyzed the demographic, clinical, surgical, and histopathological results and complications of 301 parotidectomies performed in southern part of Turkey. The study found that patients with malignant tumors had a higher mean age compared to patients with benign diseases. The mean age of Warthin tumor (WT) patients was significantly higher than pleomorphic adenoma (PA) patients. There was a significant male dominancy in WT compared to PA. The mean size of malignant tumors was significantly larger than benign tumors.
INDIAN JOURNAL OF OTOLARYNGOLOGY AND HEAD & NECK SURGERY
(2023)
Article
Geosciences, Multidisciplinary
Ismail Demiryege, Mustafa Ulukavak
Summary: This study aims to create a deep learning-based model for the prediction of ionospheric TEC. The optimum parameters for forecasting ionospheric TEC variations were investigated using GPS observations from a GNSS station, and a related model was developed.
Article
Materials Science, Multidisciplinary
Ananta Dutta, Surjya K. Pal, Sushanta K. Panda
Summary: In the realm of micro-Friction Stir Welding (FSW), this study investigates the influence of pinless and pin tool on hook formation, temperature evolution, and bonding mechanisms. The study reveals that pin tool improves joint strength and reduces axial force during traversing. Pin tool also exhibits a higher proportion of recrystallized grains compared to pinless tool, resulting in better weld quality.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Abdelmalek Habes, Mehdi Derradji, Oussama Mehelli, Fouad Benaliouche, Slimane Abdous, Youcef Medjaouri, Nour Chirine Abderrahim, Hakima Fodil, Mohamed El Amine Kadi
Summary: In recent years, there has been significant progress in advancing nanomaterials with exceptional properties for electromagnetic (EM) wave absorption. This study investigates the application of a novel thermosetting phenolic resin as a polymeric matrix for EM shielding, highlighting the enhancement of stability with the incorporation of zinc oxide nanoparticles.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Xiaoxing Zhang, Yongchao Luo, Kai Xu, Weihao Liu, Shuangshuang Tian, Benli Liu, Jiahao Wang, Feng Hu
Summary: This study calculates and analyzes the adsorption performance and sensing characteristics of Cu-MoTe2 for SF6 decomposition components. The results show that Cu-MoTe2 chemisorbs SO2 and H2S, while physisorbs SOF2. Cu-MoTe2 has the potential to be used as a chemical sensor material.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Xin Qu, Xinyu Sang, Yarong Lv, Ce Wang, Ping Hu, Quanyi Guo, Yong Liu
Summary: In this study, a PLLA-COI multilayer nanofiber membrane was prepared to prevent peritendinous adhesion, and it was found to have good cell compatibility and anti-adhesion effect, effectively promoting the recovery of Achilles tendon injury.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Ching-Yuan Ho, Chen-Yi Su, Wei-Zhe Hu
Summary: An equivalent electrical circuit (EEC) is established to understand the droplet-base electricity generation (DEG) mechanism, using voltage-time curve decomposition. The concept of Debye length is introduced to explain charge density at the interface between the ionic droplet and the PTFE surface. This study provides valuable insights into the exponential decay of output voltage and the improvement of solar panel performance in alternating rainy and dry weather through correct circuit design.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Iori Ono, Takeo Oku, Atsushi Suzuki, Sakiko Fukunishi, Tomoharu Tachikawa, Tomoya Hasegawa
Summary: The effects of adding rubidium (Rb) and ethylammonium (CH3CH2NH3, EA) to guanidinium [C(NH2)3, GA] based CH3NH3PbI3 perovskite solar cells were investigated. The lattice constants and (100)-orientation of EA and Rb-modified perovskite crystals increased compared to the as-prepared perovskite. The addition of GA and EA effectively improved the photovoltaic properties of the device under indoor light conditions.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Xuewu Li, Hongxing Wang, Zhiguo Xing, Yanfei Huang, Weiling Guo, Haidou Wang, Yanfang Zhang, Longlong Zhou
Summary: This study prepared a novel composite antireflective structure with slotted holes using FDTD simulation combined with femtosecond laser design to further improve the infrared anti-reflective performance. The results show that the antireflection performance of the simulated groove-hole composite structure is better than that of the individual groove and hole structures, and the nanoparticle structures can further improve the antireflection performance in the infrared region.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Sepideh Soltani, Hajar Ghanbari, S. Mohammad Mirkazemi
Summary: In this study, h-BN and r-BN structures were synthesized through controlled nitridation. The h-BN exhibited sheet-like morphology, while the r-BN formed needle-like hollow structures.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Wanying Zhang, Xiaoyuan Wang, Yibo Ai, Weidong Zhang
Summary: This study investigates the impact of oxygen corrosion on the mechanical properties of uranium and uranium alloys and develops a feature-guided decision tree algorithm for prediction. The research highlights crucial correlations discovered through feature engineering, improving the performance of machine learning models. The mechanical properties of uranium and uranium alloys after oxygen corrosion are successfully predicted with a prediction error of less than 5%.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Qiong Cheng, Yao Zhao, Juntao Zhuang, Ahmad M. Alshamrani
Summary: This study presents a model to simulate the transient dynamics of a car's hood door during an accident, with reinforced structure in the axial direction using graphene nanoplatelets. The results are verified through comparison with open-source results and deep neural networks. The study highlights the importance of graphene nanoplatelets in the composite system's transient and forced vibrations, and provides valuable suggestions for future structural designs.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Rostyslav Nizinkovskyi, Thorsten Halle, Manja Krueger
Summary: Cu-precipitation in reactor pressure vessel steels is a major concern for the degradation of mechanical properties. This study develops and implements a non-local phase-field model to investigate the equilibrium morphology of precipitates in the over-aged state. The model confirms that the precipitates should have an oblate lath-like shape, which is supported by experimental data. The orientation of the precipitates is consistent with literature. The mechanism of morphology accommodation is explained using the invariant-line method. However, the equilibrium values of elongation significantly deviate from experimental data, likely due to the metastable state of the precipitates during the coarsening process.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Xiaowei Li, Yafei Liu, Shiyu Luan, Deqing Ma, Xiaoyu Liu, Qiangbing Liu, Jinhui Wang
Summary: In this study, the hot deformation behavior of as-cast Mg-2Ho binary alloy under different strain rates and deformation temperatures was systematically studied. The microstructure and dynamic recrystallization mechanisms were analyzed using SEM and EBSD techniques. A strain-compensated Arrhenius constitutive equation and a PSO-BP ANN model based on machine learning were established to analyze the flow behavior. The experimental results showed that the flow stress decreased with increasing temperature and decreasing strain rate. The PSO-BP ANN model demonstrated good accuracy in predicting flow stress.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Jiaxin Liu, Guangkai Liao, Zhenyan Xie, Bowen Li, Lingna Cui, Yuejun Liu
Summary: This study investigated the rheological behavior of polyamide 6 (PA6) film during biaxial stretching and found that the elastic-plastic deformation during stretching affected the stress rebound or relaxation during heat setting. The relaxation spectrum and activation energy spectrum were calculated, revealing the process of stress relaxation as energy release and stress rebound as energy absorption. The results provide theoretical guidance for understanding the biaxial stretching deformation mechanism of polymer films.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Monisha Manathanath, Benu George, Juraij Kandiyil, Subramaniam Sujatha, Suchithra Tharamel Vasu, Sujith Athiyanathil, Unnikrishnan Gopalakrishna Panicker
Summary: This study explores a method that combines a biodegradable polymer scaffold with a photosensitizer for antibacterial photodynamic therapy. The results show a high inhibition rate against E. coli and S. aureus using this method.
MATERIALS TODAY COMMUNICATIONS
(2024)
Article
Materials Science, Multidisciplinary
Mohammad Hemmat Esfe, S. Ali Eftekhari, S. Mohammad Sajadi, Mohammad Hashemian, Soheil Salahshour, Seyed Majid Motallebi
Summary: In this study, an artificial neural network was used to predict the dynamic viscosity of MWCNT-ZnO (25:75)/SAE 10W40 oil nano-lubricant. The temperature, shear rate, and solid volume fraction were found to have significant effects on the dynamic viscosity, with shear rate being the most influential parameter.
MATERIALS TODAY COMMUNICATIONS
(2024)
