Article
Nanoscience & Nanotechnology
Solomon Hanson Duntu, Kenneth Hukpati, Iftikhar Ahmad, Mohammad Islam, Solomon Boakye-Yiadom
Summary: This study aims to enhance the fracture toughness of monolithic alumina ceramic by manipulating its microstructure with nanostructured materials. The results demonstrate that the addition of zirconia, graphene, and carbon nanotubes can significantly improve the fracture toughness and bending strength of the composites. Mechanisms such as pull-outs, crack arrest, and crack bridging by graphene and carbon nanotubes contribute to these enhancements.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2022)
Article
Materials Science, Multidisciplinary
Hashara Kandambige, Juan Bai, Jun Mei, Dongchen Qi, Ting Liao, Ziqi Sun
Summary: The loading of active noble-metal nanoparticles onto two-dimensional metal oxide supporters can improve catalytic performance through stable interfacial binding and reduced charge transfer distance. This study proposes a controllable self-assembly approach for synthesizing three types of 2D vanadium oxide supporters. The experimental results show that the 2D geometry has the optimal effect on catalytic kinetics, mainly due to the strongest Ir-V-O interaction at the particle-support interfaces. This work provides new insights into particle-support interaction mechanisms and offers a possible solution for optimizing electrocatalytic kinetics by adjusting the geometry of the supporter.
ACS MATERIALS LETTERS
(2023)
Article
Construction & Building Technology
Paulo R. de Matos, Jose S. Andrade Neto, Daniel Jansen, Angeles G. De la Torre, Ana Paula Kirchheim, Carlos E. M. Campos
Summary: This paper discusses the use of in-situ laboratory XRD to assess cement hydration. It provides a literature review, discusses experimental strategies, recommends data analysis routine, and discusses the advantages and limitations of this technique.
CEMENT AND CONCRETE RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Robert T. Bell, Nicholas A. Strange, Dan A. Plattenberger, Sarah Shulda, James Eujin Park, Andrea Ambrosini, Karen N. Heinselman, Joshua D. Sugar, Philip A. Parilla, Eric N. Coker, Anthony McDaniel, David S. Ginley
Summary: This study reports two viable routes for the synthesis of high-purity 12R-BCM, and characterizes it using synchrotron-based diffraction measurements. The results demonstrate that both approaches can produce single-phase samples, which are crucial for evaluating the efficacy of BCM as an STCH material.
ACTA CRYSTALLOGRAPHICA SECTION B-STRUCTURAL SCIENCE CRYSTAL ENGINEERING AND MATERIALS
(2022)
Article
Physics, Multidisciplinary
Liang Ma, Kui Wang, Yu Xie, Xin Yang, Yingying Wang, Mi Zhou, Hanyu Liu, Xiaohui Yu, Yongsheng Zhao, Hongbo Wang, Guangtao Liu, Yanming Ma
Summary: The discovery of superconductive rare earth and actinide superhydrides has opened up a new era of high-pressure superconductivity research. The successful synthesis of CaH6 and its remarkable superconducting properties highlight the potential for further exploration and development of high-temperature superconducting materials.
PHYSICAL REVIEW LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Sofia L. Ramirez-Rosas, Enrique Delgado-Alvarado, Luis O. Sanchez-Vargas, Agustin L. Herrera-May, Mariana G. Pena-Juarez, J. Amir Gonzalez-Calderon
Summary: In this study, isolated polyphenolic compound quercetin was utilized as a reducing agent to synthesize silver nanoparticles at neutral pH, with microcrystalline cellulose and maltodextrin as stabilizing agents. The ideal ratio of quercetin to stabilizing agent was found to be 1:2, resulting in stable AgNPs with improved antimicrobial activity for 2 months. This eco-friendly and cost-effective method demonstrated the importance of using food stabilizer for long-term stability of AgNPs.
Article
Electrochemistry
Hayley Hirsh, Yixuan Li, Ju-Hsiang Cheng, Ryosuke Shimizu, Minghao Zhang, Enyue Zhao, Ying Shirley Meng
Summary: This study investigates the oxygen redox activity induced by transition metal ordering in the P2-type Na0.8Li0.12Ni0.22Mn0.66O2 cathode synthesized by carbonate co-precipitation. Irreversible oxygen activity is observed, correlated with Ni migration causing the loss of transition metal ordering in the structure. Ni migration has a detrimental effect on transition metal ordering and reversibility of oxygen redox at high voltage.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Hiroto Nakai, Masanao Inokoshi, Kosuke Nozaki, Keiji Komatsu, Shingo Kamijo, Hengyi Liu, Makoto Shimizubata, Shunsuke Minakuchi, Bart Van Meerbeek, Jef Vleugels, Fei Zhang
Summary: The study compared the crystallography, microstructure, and flexural strength of zirconia ceramics manufactured by stereolithography and subtractive methods. The additively manufactured zirconia showed similar characteristics to the subtractively manufactured zirconia, indicating it could be a good option for dental implants.
Article
Nanoscience & Nanotechnology
Joao V. Campos, Isabela R. Lavagnini, Viviana Avila, Bola Yoon, Sanjit Ghose, Rishi Raj, Eliria M. J. A. Pallone, Lilian M. Jesus
Summary: This study investigates the Arrhenius behavior of electrical conductivity during flash sintering of 3 mol% yttria stabilized zirconia. Total conductivity was found to follow an Arrhenius-like equation in both dense and green samples, with non-linearity related to furnace temperature. A change in activation energy for conduction prior to the flash event was observed and discussed.
SCRIPTA MATERIALIA
(2021)
Article
Dentistry, Oral Surgery & Medicine
Thomas Strasser, Markus Wertz, Andreas Koenig, Torsten Koetzsch, Martin Rosentritt
Summary: The objective of this study was to compare the composition, microstructure, and mechanical strength of current multilayer zirconia blanks. Bar-shaped specimens were made from different multilayer zirconia blanks, and the microstructure and crystal structure were analyzed using scanning electron microscopy and X-ray diffraction. The results showed significant differences in flexural strength and grain size between the different layers. The findings suggest that the milling position in the blanks should be considered when using multilayer zirconia as a restorative material.
Article
Automation & Control Systems
Byung Do Lee, Jin-Woong Lee, Woon Bae Park, Joonseo Park, Min-Young Cho, Satendra Pal Singh, Myoungho Pyo, Kee-Sun Sohn
Summary: In this study, data-driven symmetry identification, property prediction, and low-dimensional embedding from powder X-Ray diffraction (XRD) patterns are performed using a fully convolutional neural network (FCN), transformer encoder (T-encoder), and variational autoencoder (VAE). The results show that powder XRD patterns can be used as informative material descriptors for deep learning, and both FCN and T-encoder outperform the well-established crystal graph convolutional neural network (CGCNN) in symmetry classification.
ADVANCED INTELLIGENT SYSTEMS
(2022)
Article
Chemistry, Multidisciplinary
Mariya Grudova, Victor N. Khrustalev, Alexey S. Kubasov, Pavel Strashnov, Zhanna Matsulevich, Julia M. Lukiyanova, Galina N. Borisova, Andreii S. Kritchenkov, Maria M. Grishina, Alexey A. Artemjev, Ivan Buslov, Vladimir K. Osmanov, Valentine G. Nenajdenko, Nguyen Q. Trung, Alexander Borisov, Alexander G. Tskhovrebov
Summary: The supramolecular chemistry of chalcogenadiazoles is widely used in materials chemistry and is gaining increasing attention. This study presents a facile method for the synthesis of a range of 1,2,4-selenadiazoles using the coupling reaction of 2-pyridylselenenyl halides with unactivated nitriles. These compounds act as novel supramolecular building blocks, engaging in various chalcogen bonding interactions. The research also discovers adducts derived from alpha-halogenated nitriles, which form stable dimers featuring specific 2Se-2N square, Hal· · ·Hal, and Se· · ·Hal noncovalent interactions.
CRYSTAL GROWTH & DESIGN
(2022)
Article
Spectroscopy
P. K. Jamshina Sanam, Midhun Shah, P. P. Pradyumnan
Summary: CuCrO2 can be tuned by Ni2+ doping to achieve emission band tuning, leading to significant changes in its optical properties.
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
(2023)
Article
Chemistry, Physical
Subhayan Roychoudhury, Sarah Shulda, Anuj Goyal, Robert T. Bell, Sami Sainio, Nicholas A. Strange, James Eujin Park, Eric N. Coker, Stephan Lany, David S. Ginley, David Prendergast
Summary: This study investigates the electronic structure of BaCe0.25Mn0.75O3-delta (BCM) using first-principles calculations and experimental O K-edge X-ray absorption spectroscopy (XAS). The results show that the change in electron density in the reduced crystal is localized around the oxygen vacancy. The observed spectral changes are explained by the lifting of spin degeneracy in the absorption peaks and a diminished O 2p contribution to the frontier unoccupied orbitals.
CHEMISTRY OF MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Mikhail Talanov, Alexander A. Bush, Vladimir P. Sirotinkin, Vladislav Kozlov
Summary: This study reveals a new structural mechanism of phase transition diffusion in ferroelectrics, which is associated with the enhanced broadening of the ferroelectric phase transition. The results show that the interaction of atomic displacements of A and B cations can lead to the enhancement of ferroelectric properties in the crossover region at a specific concentration.
Article
Chemistry, Multidisciplinary
Evan W. Zhao, Haibin Zheng, Ronghui Zhou, Helena E. Hagelin-Weaver, Clifford R. Bowers
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2015)
Article
Chemistry, Physical
Trenton W. Elkins, Helena E. Hagelin-Weaver
APPLIED CATALYSIS A-GENERAL
(2015)
Article
Chemistry, Multidisciplinary
Ronghui Zhou, Evan W. Zhao, Wei Cheng, Luke M. Neal, Haibin Zheng, Ryan E. Quinones, Helena E. Hagelin-Weaver, Clifford R. Bowers
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2015)
Article
Chemistry, Physical
Trenton W. Elkins, Samantha J. Roberts, Helena E. Hagelin-Weaver
APPLIED CATALYSIS A-GENERAL
(2016)
Article
Chemistry, Physical
Evan W. Zhao, Haibin Zheng, Kaylee Ludden, Yan Xin, Helena E. Hagelin-Weaver, Clifford R. Bowers
Article
Chemistry, Physical
Samantha J. Roberts, Nathan G. Carr, Jonathan McLaughlin, Helena E. Hagelin-Weaver
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2018)
Article
Chemistry, Inorganic & Nuclear
Andrew S. Jones, Nicolas Alfonso, Helena E. Hagelin-Weaver
Article
Chemistry, Applied
Andrew S. Jones, Daniel Aziz, Jan Ilsemann, Marcus Baumer, Helena Hagelin-Weaver
Summary: The research showed that transition metal dopants can enhance the activity and selectivity of samarium oxide xerogel catalysts in the oxidative coupling of methane, with differences in performance between different dopants and potential for alkali metal dopants under certain conditions. Dopants have a significant impact on the structure and stability of the catalyst, with transition metal dopants generally resulting in more active and selective catalysts.
Article
Chemistry, Applied
Andrew S. Jones, Daniel Aziz, Jan Ilsemann, Marcus Baeumer, Helena Hagelin-Weaver
Summary: High-valence dopants have a significant impact on the catalytic properties of samarium oxide xerogels, improving their activity and selectivity in OCM reactions. However, maintaining low concentrations of dopants is crucial, as higher concentrations and temperatures above 700°C can lead to inferior catalyst performance.
Article
Chemistry, Multidisciplinary
Bochuan Song, Diana Choi, Yan Xin, Clifford R. Bowers, Helena Hagelin-Weaver
Summary: By manipulating the shape of ceria nanocrystals, the effect of CeO2 surface structure on Pt-CeO2 interactions was investigated, revealing higher stability of Pt on CeO2 (111). Strong electronic interactions between Pt and ceria (111) in catalytic reactions can enhance selectivity and improve NMR signal enhancement.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
William G. Hale, Tommy Y. Zhao, Diana Choi, Maria-Jose Ferrer, Bochuan Song, Hanqin Zhao, Helena E. Hagelin-Weaver, Clifford R. Bowers
Summary: The use of heterogeneous hydrogenation in a continuous-flow reactor has expanded the application of parahydrogen enhanced NMR technique to key metabolites, allowing efficient separation and purification of hyperpolarised species for safe in-vivo use.
Article
Chemistry, Physical
Bochuan Song, Shuxin Si, Asiye Soleymani, Yan Xin, Helena E. Hagelin-Weaver
Summary: Well-defined surface structures and uniformity are crucial for exploring structure-activity relationships in heterogeneous catalysts. This study utilizes a modified atomic layer deposition method and three well-defined CeO2 nanoshapes to synthesize Pt/CeO2 catalysts and investigate the influence of ceria surface facet on isolated Pt species under reducing conditions.
Article
Chemistry, Physical
Evan W. Zhao, Yan Xin, Helena E. Hagelin-Weaver, Clifford R. Bowers