Article
Materials Science, Ceramics
Qianxing Huang, Taoyong Liu, Xuefeng Shen, Xiuying Li, Anxian Lu, Yi Gu
Summary: In this study, Fe2O3-doped magnesium aluminosilicate-based glasses were prepared by the traditional melt quenching method, and the effects of Fe2O3 doping on the structure and properties of the glasses were analyzed. The results indicate that Fe2O3 doping disrupts the glass network structure, reduces the thermal stability, and alters the optical properties of the glasses.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Ceramics
Panting Wang, Sasa Yan, Ying Du, Yiting Tao, Danping Chen
Summary: The effects of preparation atmosphere on the formation and photochromic properties of Al2O3-CaO system glass were investigated. Glasses fabricated under a reducing atmosphere exhibited a higher darkening degree, which increased with increasing Al content.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Ceramics
Mikkel L. Bodker, Johan B. Pedersen, Francisco Munoz, John C. Mauro, Morten M. Smedskjaer
Summary: This study successfully predicted the relationship between Si-6 content and composition in phosphosilicate glasses through statistical mechanical modeling, showing that accurate predictions require specific inclusion of the formation mechanism of Si-6.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Carly Mathewson, Isabella Urbina, John V. Badding, Venkatraman Gopalan, John C. Mauro
Summary: Novel potassium-calcium-aluminosilicate glasses have been developed as cladding material for a doped ZnSe core infrared fiber laser, showing high glass transition temperatures and thermal expansion coefficients. Successful application of these glasses as cladding for a ZnSe tunable fiber laser has been demonstrated.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Daiki Shiratori, Daisuke Nakauchi, Takumi Kato, Noriaki Kawaguchi, Takayuki Yanagida
Summary: Ce-doped Lu2O3-Al2O3-SiO2 glasses were prepared using a xenon image furnace and their physical, optical, and scintillation properties were investigated. The variations in the coordination environment of the different glass compositions were discussed in terms of the effects on photoluminescence properties. The characteristic shifts of the photoluminescence spectra were explained based on the crystal field effects and self-absorption effects due to the presence of Ce3+ and Ce4+.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Materials Science, Multidisciplinary
Binghui Deng, Ying Shi, Qi Zhou, Mathieu Bauchy
Summary: The addition of MgO to aluminosilicate glasses has a dual role as glass network modifier/charge compensator and network former, depending strongly on the composition of other oxides in the glass. The non-linear evolution of the isokom annealing temperature upon increasing Al2O3 content in the peraluminous regime can be rationalized in terms of the combined effects of short-range connectivity and medium-range ring size distribution.
Article
Chemistry, Physical
Thomas Meyneng, Jyothis Thomas, Yannick Ledemi, Mathieu Allix, Emmanuel Veron, Cecile Genevois, Raman Kashyap, Younes Messaddeq
Summary: Oxyfluoride glass-ceramics are promising materials for optical refrigeration due to their excellent mechanical and thermal properties. This study investigates the effects of fluoride compound evaporations on the thermal, optical, crystallization, and luminescent properties of oxyfluoride glass-ceramics. The relationship between composition and glass properties is studied, and the crystallization behavior is analyzed using electron microscopy and X-ray diffraction. The luminescent properties, including quantum yield and spectroscopy, are also measured.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Byoungjin So, Yicong Ding, Rene Limbach, Jae-Young Pyo, Guilherme N. B. M. de Macedo, Kai Li, Christian Friebe, Felix Otto, Maximilian Schaal, Chao Liu, Jong Heo, Lothar Wondraczek
Summary: The elastic properties of manganese aluminosilicate glasses are studied, and it is found that the presence of MnO6 units has a significant effect on the material stiffness.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Optics
Leonid Yu Mironov, Elena Kolobkova
Summary: A series of new fluorophosphate glasses with varying concentrations of Yb3+ ions were synthesized and characterized through absorption, luminescence, and luminescence kinetics measurements, while potential laser performance parameters were calculated, such as pump saturation and minimum fraction of excited ions needed for gain balance.
JOURNAL OF LUMINESCENCE
(2022)
Article
Materials Science, Ceramics
Rebecca S. Welch, Kuo-Hao Lee, Collin J. Wilkinson, Madoka Ono, Caio B. Bragatto, John C. Mauro
Summary: The study shows that oxygen triclusters have a certain impact in the calcium aluminosilicate glass system, potentially increasing glass hardness. Compared to oxynitride glasses, triclusters have a similar effect to nitrogen in increasing glass hardness but are less effective in increasing Young's modulus.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Ping Lu, Yuting Zan, Jinjun Ren, Tongyao Zhao, Kai Xu, Ashutosh Goel
Summary: The study reveals that an increase in P2O5 content in peraluminous glasses results in the crystallization of AlPO4 as the primary phase, while the substitution of SiO2 by P2O5 within a certain range (10 +/- 20 mol.%) suppresses the crystallization of nepheline.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Ceramics
Zhongbin Yin, Lanlin Yi, Fanhou Kong, Zelin Chen, Xiaohui Fang, Ruixiang Zhang, Yongjun Chen, Hong Jiang, Changjiu Li
Summary: The study investigated the effect of an electric field on the crystal grains number in MAS glass-ceramics. The results showed that an increase in electric-field voltage led to a gradual increase in crystal grains number in MAS glass-ceramics when the voltage reached 1200V. Additionally, the introduction of an electric field promoted the separation of titanium from the silicon-oxygen network framework and facilitated crystal growth.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2021)
Article
Materials Science, Ceramics
Nicholas L. Clark, Shih-Yi Chuang, John C. Mauro
Summary: The study shows that the dynamics in glasses with nanoscale phase separation transition from LSW-type to a diffusion-controlled pseudo-coalescence mechanism at about 17% droplet volume fraction, leading to elongation and interconnection of droplets. Calcium diffusion is suggested to be the main cause for the coarsening of silica-rich domains, and the transition cannot be explained by Brownian motion or Van der Waals attraction, indicating various osmotic forces may be at play.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Ceramics
Petr Varak, Pavla Nekvindova, Jan Baborak, Jiri Oswald
Summary: The study investigated the relationship between the network structure of multicomponent silicate glass and the photoluminescence properties of rare-earth ions. It was found that the change in Na2O content significantly affects network polymerization, but has limited influence on the photoluminescence of RE ions. The presence of different components, such as GeO2, Al2O3 and ZnO, significantly influences the photoluminescence properties of RE ions, with ZnO inducing the highest asymmetry in the host matrix.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Materials Science, Ceramics
Lidan Liu, Taoyong Liu, Piao Liu, Qianxing Huang, Hua Gui, Anxian Lu
Summary: In this work, CuO-doped MgO-Al2O3-SiO2 based glasses were successfully synthesized using conventional melt quenching method, and the influence of CuO content on the structure and properties of the glasses was investigated. The results showed that CuO acted as a glass modifier to depolymerize the silicate network, with the main crystalline phase being alpha-cordierite. The presence of Cu2+ ions in the octahedral sites was confirmed by the characteristic absorption band around 750 nm on the optical transmittance spectra, and luminescence caused by Cu+ ions resulted in a decrease in luminescence lifetime.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Alana L. Dixon, Herve Vezin, Thuc-Quyen Nguyen, G. N. Manjunatha Reddy
Summary: Molecular doping strategies can greatly enhance the charge carrier mobility of organic semiconductors. Understanding the mechanisms and constraints related to material energy levels is crucial for developing versatile dopants for organic semiconductors. Using short-range techniques like solid-state NMR and EPR spectroscopy, this study analyzed the local structures and interactions within dopant-polymer blends, revealing complex morphology and varying efficiencies associated with different dopants.
MATERIALS HORIZONS
(2022)
Article
Chemistry, Physical
Bernhard T. Leube, Elodie Salager, Erwan Chesneau, Gwenaelle Rousse, Herve Vezin, Artem M. Abakumov, Jean-Marie Tarascon
Summary: The synthesis and characterization of alkaline-rich transition-metal chalcogenides are intriguing tasks for solid-state chemists and battery researchers. In this study, we synthesized and characterized five novel chalcogenides, and discovered one compound with interesting cathode material properties.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Physical
Amanda Sfeir, Camila A. Teles, Maya Marinova, Herve Vezin, Jean-Philippe Dacquin, Axel Lofberg, Said Laassiri, Sebastien Royer
Summary: Modulating the interaction between Mo nanoparticles and their support can finely tune the properties of the active site. In this study, molybdenum nitride catalysts supported on TiO2 and SBA-15 were prepared and characterized. The catalytic activity of Mo species was strongly influenced by the nature of the support, with SBA-15 being the most suitable for Mo dispersion. Mo species supported on a reducible oxide (TiO2) exhibited poor catalytic activity and quick deactivation in ammonia synthesis reaction due to charge transfer from the support. Differences in oxidation states, redox behaviors, and electronic properties were further studied.
FARADAY DISCUSSIONS
(2023)
Article
Materials Science, Ceramics
Fouad Alassani, Jean Charles Desmoulin, Olivier Cavani, Yannick Petit, Thierry Cardinal, Nadege Ollier
Summary: In this study, the effects of electron irradiations on silver-containing phosphate glasses were explored using Electron Spin Resonance (ESR) and luminescence spectroscopy. The interactions between the electron beam and the silver-containing and silver-free phosphate glass matrix were discussed, as well as the formation of colored centers. The study provided insights into the electron deposition and charge trapping processes, and the understanding of point defects and Ag species allowed for better understanding of the photosensitivity of these glasses. The impact of silver concentration and glass structure on the integrated dose was also investigated. In-situ cathodoluminescence measurements revealed valuable information about the cascade of chemical reactions leading to the formation of new silver species, specifically from initial silver ions to molecular silver clusters.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Chemistry, Physical
Thibaud Aumond, Annaig Le Person, Isabelle Batonneau-Gener, Herve Vezin, Alexander Sachse, Alain Moissette
Summary: The solid-state synthesis of zeolite-templated carbons (ZTCs) using anthracene as the carbon precursor in FAU-structured zeolite is reported. The anthracene molecule's evolution and condensation into larger polyaromatic species inside the zeolite micropore system is studied using DRUV and Raman spectroscopy. The formation of the anthracene radical cation and its cyclic radical formation and recombination behavior are found to be crucial for the formation of the carbon skeleton in the ZTCs. Textural and chemical characterization of the hybrid and ZTC after zeolite removal confirms the preservation of the template zeolite's morphological and textural properties. The impact of thermal treatment on the ZTC properties is also investigated, leading to the achievement of ZTCs with emerging structural order.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Biochemistry & Molecular Biology
Romain Regnault, Frederique Klupsch, Hassiba El-Bouazzati, Romain Magnez, Rapha Le Biannic, Natascha Leleu-Chavain, Hania Ahouari, Herve Vezin, Regis Millet, Jean-Francois Goossens, Xavier Thuru, Christian Bailly
Summary: Compounds 2-5 were designed and characterized with improved anti-PD-L1 activity, with compound 5 emerging as a potent checkpoint inhibitor. It binds to PD-L1, induces its dimerization, blocks PD-1/PD-L1 signaling, and reactivates cell proliferation. Additionally, compound 5 maintains significant antioxidant activity.
Article
Biotechnology & Applied Microbiology
Julien F. Maillard, Charlotte Mase, Olivier Serve, Herve Vezin, Carlos Afonso, Pierre Giusti, Caroline Mangote
Summary: Microalga-based fuels show promise as alternatives to fossil energies due to their ability to grow under harsh conditions and capture industrial exhaust gases, thereby reducing the effects of global warming. Hydrothermal liquefaction (HTL) is an efficient way to process microalgae, generating an intermediate bio-crude and a non-usable residual solid. By eliminating problematic heteroatoms such as nitrogen, oxygen, and metals, the bio-crude can be refined to produce usable biofuel.
ALGAL RESEARCH-BIOMASS BIOFUELS AND BIOPRODUCTS
(2023)
Article
Chemistry, Multidisciplinary
Jessy Elias, Alessandro Faccinetto, Herve Vezin, Xavier Mercier
Summary: In order to combat the climate emergency, it is crucial to develop less polluting technologies, but the mechanisms involved in the formation of soot particles are still not fully understood. To address this gap, the authors used pulsed electron paramagnetic resonance to quantify and map persistent radicals on soot samples of different maturity extracted from flames.
COMMUNICATIONS CHEMISTRY
(2023)
Article
Nanoscience & Nanotechnology
Pedro H. M. Andrade, Hania Ahouari, Christophe Volkringer, Thierry Loiseau, Herve Vezin, Matthieu Hureau, Alain Moissette
Summary: This study focuses on the capture and transformation of gaseous I-2 using three distinct terephthalate-based MOFs: MIL-125(Ti), MIL-125(Ti)_NH2, and CAU-1(Al)_NH2. The results show that MIL-125(Ti)_NH2 exhibits the highest capture capacity, which is attributed to its amino group affinity, smaller band gap energy, and efficient charge separation.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Antoine Cornet, Gaston Garbarino, Federico Zontone, Yuriy Chushkin, Jeroen Jacobs, Eloi Pineda, Thierry Deschamps, Shubin Li, Alberto Ronca, Jie Shen, Guillaume Morard, Nico Neuber, Maximilian Frey, Ralf Busch, Isabella Gallino, Mohamed Mezouar, Gavin Vaughan, Beatrice Ruta
Summary: By combining the brightest x-rays available in synchrotrons with cutting edge high pressure technologies, this study provides direct evidence of the microscopic structural and dynamical mechanisms occurring under in-situ high pressure compression and decompression in metallic glasses. The results show that while pressure promotes density increasing through quasi-elastic structural deformations, the atomic mobility exhibits a hysteresis and is enhanced up to a factor 15 even at temperatures well below the glass transition. This surprising behavior results from a competition between fast avalanche-like atomic rearrangements and slow relaxation processes triggered by an anomalous super-diffusive collective particle displacement.
Article
Materials Science, Ceramics
N. Shchedrina, N. Ollier, M. Mobasher, M. Lancry
Summary: We investigated the thermal stability of silica glass after high-temperature, high-pressure densification and electron irradiations. We used isothermal annealing and in situ Raman spectroscopy to observe changes in the silica structure. By analyzing the activation energy distributions during densification, we gained insights into the relaxation pathway and its relationship with the structural properties. We observed a non-monotonous behavior in the Raman spectra of the silica glass, which can be attributed to the presence of a high-density amorphous phase. Our findings have important implications for the development of high-performance optical devices based on silica densification.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2023)
Article
Chemistry, Physical
H. Vezin, S. Marquis, P. H. M. Andrade, M. Hureau, A. Moissette
Summary: This study investigates the electron transfer processes involved in the adsorption of TMPD in large-pore FAU zeolites. The results show that even in weakly confined nonpolar environments, TMPD undergoes spontaneous ionization upon contact with the zeolite walls. The presence of charge-balancing Na+ cations in aluminum-rich FAUs slows down the diffusion and ionization processes but increases the ionization yield. The stability of the ionized state is dependent on temperature, and regardless of the aluminum content and Na+ content, the TMPD+center dot radicals fully recombine upon heating and gradually recover upon cooling.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Multidisciplinary
Thibaud Aumond, Herve Vezin, Isabelle Batonneau-Gener, Steven Compere, Yannick Pouilloux, Annaig Le Person, Alain Moissette, Alexander Sachse
Summary: This work reveals the importance of zeolite acidity in the synthesis of zeolite-templated carbons and its impact on the spin concentration and electrical conductivity of hybrid materials. The amount of zeolite acid sites fundamentally affects the electrical conductivity of the samples, which is a key parameter for describing the quality of ZTCs.
Article
Chemistry, Multidisciplinary
Lucie Quehon, Frederic Sauvage, Hania Ahouari, Sema Golonu, Herve Vezin, Anne Wadouachi, Gwladys Pourceau
Summary: Sugarlactones and their derivatives are attractive biobased platform molecules due to their easy conversion into high-added value products. However, the conventional transformation of free sugars into activated compounds is inconvenient. This study reports a rapid and efficient procedure for forming lactones/esters directly from free sugars catalyzed by a small amount of recyclable gold nanocatalyst under mild conditions. The method was successfully applied to various hexoses and pentoses, achieving excellent conversion rates. The results confirm the efficiency of the procedure and pave the way for the transformation of free sugars into valuable derivatives.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Materials Science, Multidisciplinary
T. Deschamps, C. Martinet, B. Champagnon, G. Molnar, E. Barthel
Summary: Memory effects in the deformation of densified soda-lime silicate glasses have been evidenced using Raman-microspectroscopy, and the network reconfigurations it originates from have been identified through molecular dynamics simulations. These results contribute to a better understanding of plastic instability, damage, and rupture properties in iono-covalent glassy materials.
