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Affichage de 2481 à 2490 sur 16077

Article dans une revue

Photocatalytic Performance of Perovskite and Metal–Organic Framework Hybrid Material for the Reduction of N2 to Ammonia

Masoumeh Chamack, Madjid Ifires, Sayed Ali Akbar Razavi, Ali Morsali, Ahmed Addad, Afsanehsadat Larimi, Sabine Szunerits, Rabah Boukherroub

The orthorhombic phase of KNbO3 perovskite has been applied for nitrogen (N-2) photoreduction to ammonia (NH3). However, this material suffers from a low surface area and low ammonia production efficiency under UV light irradiation. To eliminate these barriers, we used a metal-organic framework (…

Inorganic Chemistry, 2022, 61 (3), pp.1735-1744. ⟨10.1021/acs.inorgchem.1c03622⟩. ⟨hal-03549843⟩

Article dans une revue

A cost-effective technology to improve power performance of nanoribbons GaN HEMTs

Ali Soltani, Brahim Benbakhti, J.-C. Gerbedoen, Abdelkrim Khediri, Maher, Hassan, Jean-Paul Salvestrini, Abdallah Ougazzaden, Nour Eddine Bourzgui, Hassan Ali Barkad

A cost-effective fabrication process is developed to improve the power performance of AlGaN/GaN High Electron Mobility Transistors (HEMTs). This process uses nitrogen ion (N+) implantation to form multiple parallel NanoRibbons on AlGaN/GaN heterostructures, with thin buffer layer (AlGaN/GaN NR-…

Applied Physics Letters, 2022, 120 (4), pp.042102. ⟨10.1063/5.0080240⟩. ⟨hal-03544158⟩

Article dans une revue

Au-assisted polymerization of conductive poly(N-phenylglycine) as high-performance positive electrodes for asymmetric supercapacitors

Min Li, Yunyun Luo, Chen Jia, Mimi Huang, Mingzhi Yu, Guoxi Luo, Libo Zhao, Rabah Boukherroub, Zhuangde Jiang

Abstract Herein, a novel conductive poly(N-phenylglycine) (PNPG) polymer was successfully prepared, by in situ electrochemical polymerization method (+0.75 V versus Ag/AgCl) for 10 min, on flexible stainless-steel plate coated with a thin Au film (Au/SS) to serve as a binder-free pseudocapacitive…

Nanotechnology, 2022, 33 (4), pp.045602. ⟨10.1088/1361-6528/ac1fb3⟩. ⟨hal-03457822⟩

Communication dans un congrès

[Invited] Phononic crystal for dynamic viscosity determination

Laurent Carpentier, Abdellatif Gueddida, Mansour Zaremanesh, Hamed Gharibi, Ali Bahrami, Ahmed Mehaney, Ralf Lucklum, Bahram Djafari-Rouhani, Yan Pennec

We propose a two-dimensional triangular lattice solid/fluid phononic crystals (PnC) for the determination of the acoustic properties and in particular dynamic viscosity of a fluid. We show that this device is very sensitive to the acoustic parameters of the liquid, such as density or sound velocity…

Photonic and Phononic Properties of Engineered Nanostructures XII, SPIE Photonics West OPTO Conference, Jan 2022, San Francisco, United States. pp.45, ⟨10.1117/12.2615965⟩. ⟨hal-03692873⟩

Thèse

Élaboration et caractérisation de couches minces de LiNbO3 obtenues par pulvérisation cathodique et ablation laser pulsée, Elaboration and characterisation of LiNbO3 thin films obtained by sputtering and pulsed laser deposition

Laura Sauze

Atteindre le plein potentiel de la 5ème génération d’applications mobiles (5G) nécessite de pousser les performances des filtres acoustiques radiofréquences au-delà de leurs limites actuelles. Les filtres radiofréquences hautes performances existants (supérieurs à 2,5 GHz) sont réalisés à base de…, Reaching the full potential of the 5th Generation of mobile applications (5G) requires pushing the performances of acoustic radio-frequency filters beyond their current limits. Current high-performances radio-frequency filters (above 2.5 GHz) are based on aluminium nitride. Their bandwidth is…

Electronique. Université Polytechnique Hauts-de-France, 2022. Français. ⟨NNT : 2022UPHF0003⟩. ⟨tel-03654042⟩

Article dans une revue

Over-wavelength pitch sized diffraction gratings for augmented reality applications

Valter Drazic, Oksana Shramkova, Bobin Varghese, Laurent Blondé, Vincent Brac de La Perrière, Jesse Schiffler, Patrice Twardowski, Sylvain Lecler, Benjamin Walter, Estelle Mairiaux, Fuanki Bavedila, Marc Faucher, Valérie Allié

Waveguide based optical combiners for augmented reality (AR) glasses are integrating several surface relief gratings (SRG) whose pitch sizes can be as small as 200 nm for the blue wavelength. All SRG components exploit the first diffraction order to couple in and out or to deviate the light. We…

Optics Express, 2022, 30 (2), pp.1293-1303. ⟨10.1364/OE.446077⟩. ⟨hal-03561356⟩

Communication dans un congrès

[Invited] Microwave Sensing in the Modern Society

Kamel Haddadi

RF and microwave techniques and instrumentations have been widely described in the literature to address electrical or/and dielectric characterization of devices and materials. Thanks to its high potential, microwave nondestructive testing and evaluation (MNDT&E) has attracted industry in a…

2022 IEEE Radio and Wireless Symposium, RWW2022, Jan 2022, Las Vegas, United States. ⟨hal-03700596⟩

Article dans une revue

Efficient detoxification of Cr(VI)-containing effluents by sequential adsorption and reduction using a novel cysteine-doped PANi@faujasite composite: Experimental study supported by advanced statistical physics prediction

Mohamed Laabd, Abdelaziz Imgharn, Abdelghani Hsini, Yassine Naciri, Mohamed Mobarak, Sabine Szunerits, Rabah Boukherroub, Abdallah Albourine

Nowadays, the global spreading of hazardous heavy metals becomes a top-priority environmental challenge, owing to its serious detrimental health outcomes. Herein, a novel cysteine-doped polyaniline@faujasite hybrid composite (Cys-PANi@FAU-50) was synthesized via a facile in-situ polymerization…

Journal of Hazardous Materials, 2022, 422, pp.126857. ⟨10.1016/j.jhazmat.2021.126857⟩. ⟨hal-03457788⟩

Article dans une revue

Universality of the optical absorptance quantization in two-dimensional group-IV, III-V, II-VI and IV-VI semiconductors

Michel Lannoo, P Tim Prins, Zeger Hens, Daniel Vanmaekelbergh, Christophe Delerue

The optical absorptance of a single graphene layer over a wide range of wavelengths is known to be remarkably constant at the universal value πα where α is the fine structure constant. Using atomistic tight-binding calculations, we show that the absorptance spectra of nanometer-thin layers (quantum…

Physical Review B, 2022, 105, pp.035421. ⟨10.1103/PhysRevB.105.035421⟩. ⟨hal-03536349⟩

Article dans une revue

Broadband super-resolution Terahertz Time domain spectroscopy applied to Gas analysis

Sophie Eliet, Arnaud Cuisset, Francis Hindle, Jean-Francois Lampin, Romain Peretti

Commercially available Terahertz (THz) Time domain spectroscopy (THz-TDS) apparatus are used in multiple application fields from material science to biology, and even in industry to measure the thickness of a paint layers. Its broad spectral coverage is of interest for air quality monitoring and…

IEEE Transactions on Terahertz Science and Technology, 2022, 12 (1), pp.75-80. ⟨10.1109/TTHZ.2021.3120029⟩. ⟨hal-03143451v3⟩