Article
Materials Science, Ceramics
Katharina Kruppa, Itzhak I. Maor, Frank Steinbach, Vadim Beilin, Meirav Mann-Lahav, Mario Wolf, Gideon S. Grader, Armin Feldhoff
Summary: Oxide-based ceramics offer promising thermoelectric materials for recycling high-temperature waste heat. In this study, electrospun nanofibers of calcium cobaltite were compacted to improve the functional performance of the material and achieve thermal stability.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Itzhak I. Maor, Katharina Kruppa, Adi Rozencweig, Amir Sterzer, Frank Steinbach, Vadim Beilin, Bernd Breidenstein, Gennady E. Shter, Meirav Mann-Lahav, Armin Feldhoff, Gideon S. Grader
Summary: Calcium cobaltite Ca3Co4-xO9+δ (CCO) is a promising p-type thermoelectric material with anisotropic properties. Texturing and nanostructuring are favored to improve its performance. This study successfully assembled electrospun CCO nanoribbon ceramics with high electrical conductivity and greatly enhanced Seebeck coefficient, surpassing previous performances. The textured nanoribbon ceramic also achieved a relatively large figure-of-merit, making it a notable advancement in CCO thermoelectric materials.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Xu Li, Yanyan Ouyang, Ran Zhang, Xingfu Tao, Yongfeng Geng, Shi Li, Yi Zhang, Huifang Gao
Summary: The study uses high resolution transmission electron microscope and geometric phase analysis to investigate strain distribution in GaAs/AlAs multilayer superlattices. It reveals that strains increase farther from the substrate and exhibit anisotropy in different directions. The interface with large strain is more likely to experience cracking or failure.
Article
Chemistry, Physical
Aneta Wardak, Witold Chrominski, Anna Reszka, Dominika Kochanowska, Marta Witkowska-Baran, Malgorzata Lewandowska, Andrzej Mycielski
Summary: This study presents a defect analysis in Cd and Te inclusion regions within Bridgman-grown Cd0.95Mn0.05Te crystals for nuclear detectors. Contrary to Cd inclusions causing microcracks, Te inclusions do not generate defects but induce higher stresses. The higher stress from Te inclusions has a smaller impact on charge carrier transport in detectors compared to Cd inclusions, as confirmed by mu tau product measurements.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
E. P. Skipetrov, E. Bogdanov, B. B. Kovalev, L. A. Skipetrova, A. Knotko, A. Emelyanov, A. N. Taldenkov, V. E. Slynko
Summary: We synthesized a single-crystal Pb1-x-ySnxScyTe ingot and studied the magnetic properties of alloys cut from it. The samples exhibited paramagnetic contribution at low temperatures and high-temperature ferromagnetic ordering in p-type samples, with spin-glass-like behavior and ferromagnetic hysteresis loops detected at temperatures below 100 K.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Yuhan Zhong, Viktoriia Untilova, Dominique Muller, Shubhradip Guchait, Celine Kiefer, Laurent Herrmann, Nicolas Zimmermann, Marion Brosset, Thomas Heiser, Martin Brinkmann
Summary: This contribution demonstrates that doping of oriented semicrystalline P3HT thin films can enhance charge conductivities and thermoelectric power factors. The doping mechanism is found to be intimately related to the semicrystalline structure of the polymer, and preferential doping of the amorphous phase can improve charge mobilities and thermoelectric power factors.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Physical
Yuan Zang, Lianbi Li, Jichao Hu, Lei Li, Zelong Li, Zebin Li, Song Feng, Guoqing Zhang, Caijuan Xia, Hongbin Pu
Summary: In this study, transmission electron microscopy was used to analyze the shape and internal strain of bent silicon nanowires prepared by asymmetric electron-beam evaporation. The results showed that asymmetric deposition of chromium led to the formation of nanosized amorphous silicon domains, and the non-crystallinity of the nanowires could be controlled by the bending radius.
Review
Chemistry, Multidisciplinary
Xiaoling Lang, Saianand Gopalan, Wanlin Fu, Seeram Ramakrishna
Summary: Hydrogen energy is considered as a competitive and environmentally friendly carrier due to its high calorific value, carbon-free emission, and renewability. Photocatalytic water splitting using metal/metal oxide composite electrospun semiconductor photocatalysts is a clean solution for hydrogen production. However, challenges remain in the commercialization and scale-up production of photocatalysts in terms of fabrication, modification, and performance improvement.
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN
(2021)
Article
Materials Science, Multidisciplinary
Ziqiao Jiang, Ce Wang, Zhenglong Yang, Juan Jin
Summary: A new proposal for developing a highly sensitive 3H-2B gas sensor for real-time monitoring of Listeria monocytogenes (LM) in food is presented. The sensor, based on p-Cr2O3/n-SnO2 binary heterojunction nanofibers, shows excellent 3H-2B sensing performance with high selectivity and stability.
Article
Physics, Applied
Jochen Bruckbauer, Yipin Gong, Ling Jiu, Michael J. Wallace, Anja Ipsen, Sebastian Bauer, Raphael Muller, Jie Bai, Klaus Thonke, Tao Wang, Carol Trager-Cowan, Robert W. Martin
Summary: The study found that using stripe structures during overgrowth of non-polar GaN can significantly reduce extended defects and improve emission uniformity. Additionally, the combination of stripes and microrods provides a promising approach for defect reduction and emission uniformity in non-polar GaN.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Priyanka Yadav, Kovuru Gopalaiah, Vipul Shrivastava, Rajamani Nagarajan
Summary: This study successfully fabricated a microspherical core-shell structure consisting of MoO2 and graphitic-C3N4 through a simple one-step calcination procedure. The core-shell exhibited high optical bandgap, facilitated dye degradation, and promoted organic synthesis.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Polymer Science
Alessandra Ruyz Medeiros, Fabiana da Silva Lima, Andressa Giombelli Rosenberger, Douglas Cardoso Dragunski, Edvani Curti Muniz, Eduardo Radovanovic, Josiane Caetano
Summary: This study aimed to use electrospinning to obtain PBAT/PLA polymer fibers with semiconductors TiO2-R and Fe3O4 to enhance the photocatalytic degradation of environmental contaminants. The parameters used in electrospinning were a needle to target distance of 12 cm, a flow rate of 1 mL h(-1), and a voltage of 14 kV. The best mass ratio of semiconductors in the fibers was determined to be 10% TiO2-R and 1% Fe3O4 at pH 7.0. Characterization techniques such as SEM, DSC, XRD, TGA, and FTIR confirmed the presence of TiO2-R and Fe3O4 in the fibers and their interaction with the polymers, leading to changes in crystallinity and degradation temperature. The fibers exhibited a 64.0% efficiency in degrading Reactive Red 195 dye within 24 hours, indicating potential for photocatalytic degradation of environmental contaminants.
News Item
Optics
Yuya Morimoto
Summary: A transmission electron microscopy technique allows the recording of movies capturing the dynamic behavior of optical near-fields with a temporal resolution surpassing the oscillation of optical electric fields.
Article
Materials Science, Multidisciplinary
Ziqiao Jiang, Ce Wang, Zhenglong Yang, Li Zhang, Juan Jin, Xiaoling Guo, Linlin Zhong, Zhenglong Duan, Haifeng Li
Summary: The Eu2O3/Au/SnO2 ternary nanofibers prepared via a synergetic approach exhibit a remarkable response to acetone detection at a low operating temperature, with fast response recovery kinetics and selective detection capabilities. This enhancement in sensing properties is attributed to the construction of heterostructures and chemical sensitization, providing a potential pathway for developing efficient acetone sensors for health security.
Article
Materials Science, Multidisciplinary
Qiushi Jiang, Zhaolian Han, Yafeng Yuan, Chuan Cai, Jinying Li, Zhiqiang Cheng
Summary: This study introduces the reaction between nano-ZnO and H2C2O4 in the electrospinning solution to effectively adjust the heterostructure of TiO2/ZnO and control the particle size of nano-spheres. The soaking and calcination process allows ZnO to fully combine with the TiO2 precursor, forming a phase-mixed heterojunction. The phase-mixed structure enhances light utilization and results in enhanced photocatalytic activity and cycling stability of TiO2/ZnO mixed materials. This research provides a new approach for the preparation of controllable metal oxide phase-mixed materials.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Materials Science, Multidisciplinary
Madeeha Riaz, Manahil Najam, Hina Imtiaz, Farooq Bashir, Tousif Hussain
Summary: This study focuses on the structural and biological analysis of Zn-Cu based biodegradable alloys for orthopedic applications. The results indicate that the alloys have good electrical conductivity and biocompatibility, with potential for promoting bone growth and healing process. Additionally, the alloys exhibit a low corrosion rate and improved corrosion resistance.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Rijo Rajeev, Sk Safikul Islam, Anitha Varghese, Gurumurthy Hegde, Suryasarathi Bose
Summary: In this study, a facile and selective electrochemical sensor was developed for the sensing of guanosine. The sensor utilized a unique porous structure and ordered framework, enabling linear detection of guanosine concentration in the range of 0.123-720 μM under specific conditions.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Rafael V. M. Freire, Dominique Celeste de A. Dias, Jose Yago Rodrigues Silva, Dayane Kelly Dias do Nascimento Santos, Larissa T. Jesus, Ricardo O. Freire, Severino A. Junior
Summary: This study reports the extraction and isolation of euphol from nature, its adsorption in nanosized ZIF-8, and the efficacy of this system against cancer cells. Experimental and simulation results show that ZIF-8 can enhance the effectiveness of euphol against cancer cells and selectively target cancer cells.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Manal A. Awad, Awatif A. Hendi, Maha M. Almoneef, Maymunah Alwehaibi, Khalid M. Ortashi, Wadha Alenazi, Fatimah S. Alfaifi, Shareefa Alahmariye, Asma Alangery, Warda Ali Alghoubiri, Haia Aldosari
Summary: In this study, magnesium-doped zinc oxide nanoparticles were synthesized and characterized. The research findings show that magnesium doping can alter the crystal structure and optical properties of zinc oxide, while enhancing its dielectric constant.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
F. J. Willars-Rodriguez, I. R. Chaverz-Urbiola, M. A. Hernandez-Landaverde, A. Zavala-Franco, E. A. Chavez-Urbiola, P. Vorobiev, Yu V. Vorobiev
Summary: This study focuses on manganese doped CdS thin films synthesized by chemical bath deposition. The incorporation of Mn2+ cations in CdS was found to influence the crystalline structure, morphology, and optoelectronic properties. Doped thin films exhibited a uniform hexagonal structure, changed growth orientation, and showed scale-like and needle-like morphologies. The bandgap and rectification speed of Schottky diodes were modified by introducing manganese. This study suggests the potential for affordable high-speed optoelectronic devices.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Mehdi Javidi, Hooman Karimi Abadeh, Fatemeh Namazi, Hamid Reza Yazdanpanah, Narjes Shirvani Shiri
Summary: This study investigated the synergistic effect of temperature, solution velocity, and sulphuric acid concentration on the corrosion behavior of carbon steel using response surface methodology. The results showed that temperature affected anodic reactions, solution velocity influenced cathodic reactions, and acid concentration altered the corrosion mechanisms by changing the properties of the surface layer.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
R. Sakthivel, Thirumoorthy Kulandaivel, Kirankumar Venkatesan Savunthari, K. Mohanraj, Hans-Uwe Dahms, Aswin kumar Anbalagan, Manjunath Rangasamy, Kien-Voon Kong
Summary: In this study, saturated fatty acids were incorporated with silane to modify viscose fabric, resulting in superhydrophobic and superoleophilic properties. The modified fabric showed excellent separation efficiency for oil and organic solvents, with high absorption capacity. The modified fabric also exhibited durability and retained its properties in harsh conditions.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Wei Zhang, Hong Lei, Wenqing Liu, Zefang Zhang, Yi Chen, Xiaogang Hu, Xiangshan Ye
Summary: In this study, EDTA-grafted alumina composite abrasives were produced by a two-step process for the CMP of sapphire substrates. Experimental results showed that the modified abrasives exhibited better dispersion properties and significantly improved polishing efficiency, with higher material removal rates and lower surface roughness. The combination of chemical reaction and mechanical action enhanced the CMP performance.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Shumaila Rafaqat, Bushra Perveen, Warda Raqba, Warda Imran, Arshad Hussain, Naeem Ali
Summary: This study developed a MnP-based biosensor for quantitative measurement of dye concentrations using electrochemical signals. The effects of two different dyes on MnP activity were investigated, with one dye showing inhibitory effects and the other dye having no effect. The study demonstrates the potential application of enzyme-based biosensors in dye detection and toxicological monitoring.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Jinyan Shi, Oguzhan Yavuz Bayraktar, Baris Bayrak, Burak Bodur, Ali Oz, Gokhan Kaplan, Abdulkadir Cuneyt Aydin
Summary: The elemental composition of precursors is crucial for the performance development of geopolymers. The use of lime instead of metakaolin increases the fluidity and mechanical properties of geopolymers, while the addition of gypsum decreases them. Furthermore, higher lime content exacerbates the negative effect of gypsum.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Aayush Gupta, Kaveri Ajravat, Loveleen K. Brar, O. P. Pandey, Pandey Rajagopalan
Summary: This study focuses on the performance of Mn3O4-ZnO composite material in wastewater treatment and energy storage applications, and presents a detailed comparative analysis. Results show that the composite material with equal concentrations of Mn3O4 and ZnO exhibits excellent photocatalytic activity and high capacitance.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
V. Murugabalaji, Matruprasad Rout, Harsh Soni, Biranchi Narayan Sahoo
Summary: This study focuses on the corrosion characteristics of AA 7075 and AA 7075 based hybrid composite fabricated using stir casting and hot rolling techniques. The results show that the hybrid composite produced by hot cross rolling exhibits better corrosion resistance compared to the base metal. The addition of a small amount of graphite improves the bonding between the matrix and reinforcements, and the hot cross rolling enhances this bonding, leading to the formation of a strong passivation oxide layer and increased charge transfer resistance, thereby improving corrosion resistance.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Fangkun Ning, Qinghao Shi, Shuping Kong, Weitao Jia, Lifeng Ma
Summary: The paper investigates a new method of rolling sheets with variable chamfering amounts in both the transversal and normal directions. The feasibility of the technological process was tested through simulation and compared with experimental results. Three important process parameters, temperature, stress, and flow velocity, were used to evaluate the effects on chamfering amount before determining the optimal angle. The spread formula for evaluating the shape quality of the plate after ECR was obtained through testing and theory.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
Aqeel Abbas, M. A. Hussein, Mohamed Javid
Summary: In this study, the AM60 magnesium alloy was processed using high-energy ball milling, and the results showed that different reinforcement agents had certain effects on particle size, crystallite size, lattice strain, and dislocation density.
MATERIALS CHEMISTRY AND PHYSICS
(2024)
Article
Materials Science, Multidisciplinary
D. S. Mahmoud, E. M. Eldesouki, W. M. Abd El-Gawad
Summary: The development of flexible and lightweight microwave-absorbing materials has become a trendy topic. This study focuses on enhancing the microwave-absorbing performance of butadiene-acrylonitrile rubber (NBR) by incorporating novel reinforcing nanofillers. The results show that the NBR nanocomposite with a loading of 16 parts per hundred rubber (phr) of LiFe 20%/Si has the best microwave-absorbing performance.
MATERIALS CHEMISTRY AND PHYSICS
(2024)