Results 31 to 40 of about 10,257 (156)

Low‐Field Giant Dielectric Tunability by Polaron‐Mediated Interfacial Polarization in Pulsed‐Laser‐Deposited‐Nanocrystalline/Amorphous Composite BaTiO3 Thin Films

Advanced Electronic Materials, EarlyView.
Comparison of tunability efficiency between vacuum‐deposited PLD‐BTO films grown at Td = 550°C in the present study and representative previous reports. ABSTRACT Electrically tunable dielectric thin films are essential components for next‐generation low‐voltage electronic devices.
Shinya Kondo, Taichi Murakami, Loick Pichon, Joël Leblanc‐Lavoie, Takashi Teranishi, Akira Kishimoto, Tomoaki Yamada, My Ali El Khakani   +7 more
wiley   +1 more source

Traitements de conservation-restauration des objets de scène à la Bibliothèque nationale de France

Déméter, 2021
La conservation-restauration d’objets de scène soulève de nombreuses questions déontologiques. Commencer un traitement peut s’apparenter à une gageure : comment assurer la bonne conservation de l’objet et son intégrité historique, esthétique ...
Lucile Dessennes
doaj   +1 more source

Comparaison du comportement thermique des cases traditionnelles classiques et modernes au nord-Cameroun

AMJAU, African and Mediterranean Journal of Architecture and Urbanism, 2020
Le début du XXe siècle marque l’introduction progressive des matériaux industriels au Nord-Cameroun. Produits de la grande diversité naturelle et ethnique de la région, les architectures traditionnelles du nord Cameroun ont subi d’importantes ...
Inna Yaya Aissatou Hamadou, Majid Mansour, Larbi Bouayad, Khalid El Jouhari, Houda Zerraf   +4 more
doaj  

Functionalization-Mediated Synthesis of Bridge-Coordinated Fe Atoms on MoS₂ Nanosheets for PEM Water Electrolyzers. [PDF]

Angew Chem Int Ed Engl
We report a functionalization‐mediated strategy to synthesize robust iron (Fe) atoms selectively coordinated at bridge sites on molybdenum disulfide (MoS2) nanosheets. The resulting b‐Fe‐MoS2 catalyst exhibits enhanced activity and durability for the hydrogen evolution reaction in proton exchange membrane water electrolyzers compared to atop ...
Anfar Z, Maslouh H, Yang Y, Moderne M, Liu J, Assaud L, Bechelany M, Salameh C, Qi K, Meng Y, Wu H, Li J, Bedford NM, Voiry D.   +13 more
europepmc   +2 more sources

Multi‐Scale Investigation of Supramolecular Organogels Assembled From Pt(II)‐Salphen Complexes

Chemistry – A European Journal, EarlyView.
A family of Pt(II)‐salphen complexes with long alkyl chains is investigated as low‐molecular‐weight organogelators. Multi‐scale characterization of their supramolecular gels reveals how the chain length, Pt‐Pt interactions, and π–π stacking direct self‐assembly and tune gel mechanics.
Pablo Msellem, Davide Condotta, Lise‐Marie Chamoreau, Mickaël Pomes‐Hadda, Nathan J. Van Zee, Cédric Lorthioir, Clément Guibert, Guillaume Vives   +7 more
wiley   +1 more source

Modélisation, caractérisation, simulation et interprétation du comportement thermique de la paroi à inertie faible d’une serre tunnel expérimentale à l’aide du quotient de Bibi CB (.)

Revue des Énergies Renouvelables, 2013
La serre tunnel agricole classique est largement répandue dans les pays méditerranéens, malgré les insuffisances qu’elle présente, notamment la surchauffe pendant le jour et le refroidissement nocturne intense, qui parfois se traduit par l’inversion ...
S. Bendimerad, T. Mahdjoub, N. Bibi-Triki, M.Z. Bessenoussi, B. Draoui, Z. Nakoul, S. Khelladi   +6 more
doaj  

Silver‐Mediated Deuterium Labelling of Quinones and Related Compounds by Hydrogen Isotope Exchange With D2O

Chemistry – A European Journal, EarlyView.
A new silver‐catalyzed H/D exchange reaction was developed for the labelling of quinones and related compounds. Both homogeneous and heterogeneous catalytic processes were implemented using heavy water as a simple deuterium source. The corresponding deuterated compounds were obtained with high isotopic enrichment through a practical method that opens ...
Joyce C. de Oliveira, Mateus P. Nunes, Frédéric Miserque, Valérie Geertsen, Guilherme A. M. Jardim, Eric Doris, Eufrânio N. da Silva Júnior, Edmond Gravel   +7 more
wiley   +1 more source

Des voies d'évolution pour les matériaux utilisés dans le matériel roulant SNCF

MATEC Web of Conferences, 2013
La recherche de la performance a été, dès les débuts du chemin de fer, une forte motivation des techniciens et ingénieurs. Si les premiers matériels étaient essentiellement en bois, l'introduction de matériaux métalliques dans les structures a permis des
Lallet Patrick, Cocheteux Francis
doaj   +1 more source

Redox‐Switchable Optical and Magnetic Properties in a Self‐Assembled Hexanuclear Ni(II) Double‐Decker Complex

Chemistry – A European Journal, EarlyView.
A triangular double‐decker Ni6 complex self‐assembles from Ni(II), TMEDA, and a triphenylene tris dioxolene non‐innocent ligand, with two face‐to‐face tris‐semiquinone decks held by a strong covalent C─C interaction. This rigid scaffold delivers four reversible ligand‐centered redox events: oxidation switches on an intense near‐infrared band and ...
Aristide Colin, Yiting Wang, François Lambert, Régis Guillot, Eric Rivière, Zakaria Halime, Nicolas Suaud, Nathalie Guihéry, Ganping Wang, Thayalan Rajeshkumar, Laurent Maron, Nathalie Bridonneau, Talal Mallah   +12 more
wiley   +1 more source

Direct Observation of a Hydrogen‐Bonding Assisted Quasi‐Reversible Superoxo/Peroxo Interconversion in a Heme Model

Chemistry – A European Journal, EarlyView.
First direct observation of a quasi‐reversible superoxo (FeIII─O2˙ˉ)/peroxo (FeIII─O22ˉ) redox couple in a heme model complex, featuring a biologically relevant low‐spin ferric end‐on peroxo species stabilized by second‐sphere hydrogen bonding. These findings highlight the key role of second‐sphere interactions in modulating O2 activation pathways ...
Adelais Trapali, Régis Guillot, Christian Herrero, Sylvain Bertaina, Athanassios Coutsolelos, Maylis Orio, Zakaria Halime   +6 more
wiley   +1 more source