Article
Chemistry, Multidisciplinary
Rongxin Sun, Xudong Wei, Wentao Hu, Pan Ying, Yingju Wu, Linyan Wang, Shuai Chen, Xiang Zhang, Mengdong Ma, Dongli Yu, Lin Wang, Guoying Gao, Bo Xu, Yongjun Tian
Summary: Nanocrystalline beta-SiC bulks with hardness exceeding the superhard threshold of 40 GPa are successfully fabricated through high-pressure and high-temperature sintering of nanoparticles. This achievement represents an important progress in superhard materials research and opens up possibilities for nanostructuring in other hard materials.
Article
Materials Science, Multidisciplinary
Xinchang Wang, Enzhi Liu, Weihan Li, Yu Qiao, Fanghong Sun, Da Shu
Summary: A new method for fabricating high-quality double-side-polished freestanding diamond films is proposed in this study. By depositing diamond films on SiC substrates and polishing and separating them, the fracture of diamond films can be avoided and the reusability of SiC substrates can be improved.
Article
Chemistry, Multidisciplinary
Baiqi Shao, Mei Yang, Fangfu Ye
Summary: Phase engineering is crucial in nano science and technology. A new synthetic route using topotactic structural transformation was described to address the formation of intermediate phases in the growth of beta-NaYF4 nanocrystals. The study shows that topotactic structural transformation can be an efficient tool for phase engineering in modern nanomaterial science.
Article
Materials Science, Ceramics
Rongqian Yao, Yinong Zheng, Chao Jin, Wenyan Huang, Yuchen Han, Ke Li, Siqi Lan, Zhenguo Huang, Jiahao Hu, Yinggan Zhang
Summary: The unique properties of MoSi2 open up new opportunities for preparing bulk polymer-derived ceramics with favorable structural-functional capabilities. By utilizing a production route involving re-pyrolysis of ball-milling-induced SiC fillers and flexible precursors blends, in situ formed SiC(rGO, xMoSi(2)) bulk PDCs with optimized properties can be obtained. Notably, these materials exhibit enhanced hardness, fracture toughness, and thermal conductivity, making them promising for emerging uses in the aerospace field.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Engineering, Environmental
Xiaojie Huang, Zhouyang Long, Zhe Wang, Shuang Li, Pingbo Zhang, Yan Leng
Summary: In this study, silicon-carbon composites (Si-C-n) were designed and prepared as novel supports for nano Pt catalyst to enhance the activity and selectivity in the oxidation of glycerol to glyceric acid (GLYA). The Pt/Si-C-3 catalyst exhibited significantly enhanced glycerol conversion (74.4%) and exceptional GLYA selectivity (86.7%). The introduction of Si species in the carbon framework provided weak acid sites in Pt/Si-C-n, promoting the desorption of product GLYA, enhancing the electronic interaction between Pt and the support, and reducing the activation energy of the rate-determining step, thus contributing to high activity and selectivity towards GLYA.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Multidisciplinary Sciences
Jean-Baptiste Vaney, Baptiste Vignolle, Alain Demourgues, Etienne Gaudin, Etienne Durand, Christine Labrugere, Fabio Bernardini, Andres Cano, Sophie Tence
Summary: This article introduces a topochemical method for intercalating fluorine atoms into intermetallics and demonstrates its potential by synthesizing non-stoichiometric mixed anion LaFeSiFx single crystals, which exhibit FeSi-based superconductivity. The study shows that fluorine topochemistry on intermetallics is an effective route for providing functional materials.
NATURE COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Ajit Kanale, B. Jayant Baliga
Summary: By utilizing an enhancement mode MOSFET and reducing gate bias, the short-circuit withstand time of SiC power MOSFETs can be significantly improved, although there will be increases in on-resistance and switching loss.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Chemistry, Multidisciplinary
Jianhua Hou, Liang Fang, Xiaozhi Wang, Hong Gao, Guoxiu Wang
Summary: Mesoporous hollow SiC nanospheres with high specific surface area and good dispersion have been successfully synthesized. The obtained nanospheres exhibit high-rate capacitance and long cycling stability in supercapacitors.
CHEMICAL COMMUNICATIONS
(2022)
Article
Biochemistry & Molecular Biology
Karla Begonia Cervantes-Diaz, Martin Drobek, Anne Julbe, Andre Ayral, Julien Cambedouzou
Summary: Photocatalytically active mesoporous silicon carbide (SiC) layers were synthesized and showed efficient degradation of organic pollutants under UV light irradiation. The SiC-based materials offer promising potential for the development of efficient photocatalytic membrane reactors for water treatment.
Review
Plant Sciences
Abid Hussain Wani, Showkat Hamid Mir, Santosh Kumar, Mushtaq Ahmad Malik, Sumira Tyub, Irfan Rashid
Summary: The beneficial effects of silicon in higher plants are widely recognized, but the uptake, transport, and deposition of silicon are influenced by various factors and processes, leading to variations in its benefits. The actual mechanism of silicon's journey from soil to leaf is still not well understood, and contradictory reports further complicate the understanding. Thorough knowledge of these factors and processes is crucial for maximizing the benefits of silicon in stressful environments.
PLANT GROWTH REGULATION
(2023)
Article
Materials Science, Ceramics
Gulnar Abdul Karim, Abhijit Ghosh, Rekha Rao, Madangopal Krishnan
Summary: Natural wood is utilized as a template to synthesize porous silicon carbide with a complex cellular structure, which is further processed to obtain nano-sized SiC powder through grinding and milling. A grinding limit is reported for the first time in the SiC system.
ADVANCES IN APPLIED CERAMICS
(2021)
Editorial Material
Biochemistry & Molecular Biology
Hannah E. Augustijn, Marnix H. Medema
Summary: In this study, Patel et al. describe new technologies for the computer-aided redesign of gene clusters to study microbial-derived metabolites. Utilizing this approach, they identify a new class of nucleotide metabolites derived from the microbiome.
Article
Engineering, Electrical & Electronic
Di Zhang, Xu She
Summary: This letter introduces the patented hybrid multilevel converters with silicon (Si) and silicon carbide (SiC) devices (US10191531B2) and its impact to industry and academia. The patent invented a novel concept by combining high frequency switched SiC devices and fundamental frequency switched Si devices, therefore, balances the cost and performance. The patent has been implemented in the world's first megawatt-class and multikilovolt hybrid electric aircraft system. Additionally, there are many worldwide following up works in extended topologies, control, and modulation methods.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Nanoscience & Nanotechnology
Amin Farhadi, Theresa Bartschmid, Gilles R. Bourret
Summary: In this study, thermal dewetting was used to structure gold-based catalytic etching masks for metal-assisted chemical etching (MACE). The approach involved low-temperature dewetting of metal films to generate metal holey meshes with tunable morphologies. Combined with MACE, dewetting-assisted patterning provided a simple route to synthesize Si nanotubes, Si nanowalls, and Si nanowires with defined dimensions and optical properties.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Multidisciplinary
Rafal Idczak, Piotr Sobota, Lan Maria Tran, Michal Babij, Karolina Idczak, Wojciech Nowak, Adam Pikul
Summary: A new route for the synthesis of high-entropy carbides by mechanical alloying is presented. The materials crystallize with a rock-salt structure and exhibit reduced structural defects after annealing, without any trace of magnetic or superconducting phase transitions.
METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Guy Rahamim, Ehud Greenberg, Khalil Rajoua, Frederic Favier, Hagay Shpaisman, David Zitoun
ADVANCED MATERIALS INTERFACES
(2019)
Article
Chemistry, Multidisciplinary
Roza Bouchal, Zhujie Li, Chandra Bongu, Steven Le Vot, Romain Berthelot, Benjamin Rotenberg, Frederic Favier, Stefan A. Freunberger, Mathieu Salanne, Olivier Fontaine
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2020)
Article
Chemistry, Multidisciplinary
Nicolas Goubard-Bretesche, Olivier Crosnier, Camille Douard, Antonella Iadecola, Richard Retoux, Christophe Payen, Marie-Liesse Doublet, Kazuaki Kisu, Etsuro Iwama, Katsuhiko Naoi, Frederic Favier, Thierry Brousse
Article
Chemistry, Physical
Yachao Zhu, Khalil Rajoua, Steven Le Vot, Olivier Fontaine, Patrice Simon, Frederic Favier
Article
Electrochemistry
Marion Maffre, Roza Bouchal, Stefan A. Freunberger, Niklas Lindahl, Patrik Johansson, Frederic Favier, Olivier Fontaine, Daniel Belanger
Summary: LiTFSI-based water-in-salt electrolytes have wide electrochemical stability windows, with the onset of the oxygen evolution reaction shifting significantly with salt concentration due to accumulation of hydrophobic anions. The oxidation processes are complex, involving OER, carbon and salt decomposition, and salt precipitation, with the importance of OER intermediates and surface films for electrolyte and electrode stability highlighted. Further studies of electrode nature are motivated.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Botayna Bounor, Bouchra Asbani, Camille Douard, Frederic Favier, Thierry Brousse, Christophe Lethien
Summary: In the near future, the deployment of Internet of Things will be extensive, and 3D micro-supercapacitors may become a crucial energy storage solution for powering miniaturized electronic devices. Currently, there are no microdevices available on the market that can meet both energy and production requirements.
ENERGY STORAGE MATERIALS
(2021)
Article
Electrochemistry
Yachao Zhu, Khalil Rajoua, Steven Le Vot, Olivier Fontaine, Patrice Simon, Frederic Favier
Summary: A MnO2-MXene composite material with enhanced electrical conductivity and stability has been developed, showing promising potential for application in electrochemical cells.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Electrochemistry
Yannick Dufil, Frederic Favier, Thierry Brousse, Christophe Lethien, Jean Le Bideau, Olivier Fontaine
Summary: This study investigates the limiting factors in the local transport of Miniaturized Electrochemical Energy Storage (MEES), particularly in 3D Li-ion microbatteries, using finite element modeling. Contrary to previous literature, the research shows that the electronic conductivity of the electrodes does not significantly affect the performance of Li-ion microbatteries. The main limiting factors are found to be ionic diffusion inside the electrode, as well as the geometry and charge applied to the battery (Crate), which are closely related to ionic diffusion in the electrode.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Yannick Dufil, Marc Dietrich, Dodzi Zigah, Frederic Favier, Said Sadki, Pascal Gentile, Olivier Fontaine
Summary: This study introduces scanning electrochemical microscopy (SECM) as a new technique for in situ characterization and acceleration of degradation processes of conducting polymers, aiming to study the conjugated/conducting polymer-based nanostructured electrodes used for micro-electrochemical energy storage (MEES).
Article
Electrochemistry
Botayna Bounor, Bouchra Asbani, Camille Douard, Dominique Deresmes, Didier Stievenard, Pascal Roussel, Frederic Favier, Christophe Lethien, Thierry Brousse
Summary: To improve the electrochemical performance of 3D micro-supercapacitors, nanostructured MnO2 films need to be conformally deposited onto the 3D template. The growth mechanism of these films obtained through pulsed electrodeposition was studied using in situ Atomic Force Microscopy and Scanning Electron Microscopy to enhance their electrochemical performance. The impact of ON and OFF times during the deposition process was investigated, providing guidelines for tuning the deposit morphology.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Marion Maffre, Xuanze Wang, Jie Deng, Siraprapha Deebansok, Yachao Zhu, Frederic Favier, Daniel Belanger, Olivier Fontaine
Summary: Superconcentrated aqueous electrolytes, known as water-in-salt electrolytes, have gained attention for their potential application in aqueous rechargeable batteries. The high salt concentration results in an increased electrochemical stability window, causing shifts in the reaction potentials of hydrogen evolution and oxygen evolution reactions. The decrease in free water molecule concentration plays a role in affecting the permittivity of the solution and the overpotentials of OER and HER.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Electrochemistry
Charlotte Bodin, Chandra Sekhar Bongur, Mathieu Deschanels, Sylvain Catrouillet, Steven Le Vot, Frederic Favier, Olivier Fontaine
BATTERIES & SUPERCAPS
(2020)
Article
Electrochemistry
Bongu Chandra Sekhar, Rahma Hachicha, Marion Maffre, Charlotte Bodin, Steven le Vot, Frederic Favier, Olivier Fontaine
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2020)