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Affichage de 1971 à 1980 sur 16170

  • Article dans une revue

Dispersion of surface acoustic waves in thin films at extreme wavelength-to-thickness ratios

Marc Duquennoy, Tahar Kadi, Mohammadi Ouaftouh, Nikolay Smagin, Frédéric Jenot

Surface acoustic waves (SAWs) are sensitive to the presence of a layer on the surface of a material, even if this layer is extremely thin compared to their wavelengths. Given the very slow propagation velocities of SAWs compared to electromagnetic waves, their wavelengths are on the order of 40 μm…

JASA Express Letters, 2022, 2 (10), pp.104002. ⟨10.1121/10.0014859⟩. ⟨hal-03835165⟩

  • Article dans une revue

CNTFET‐based ternary address decoder design

Rawan Mohammed, Mohammed Fouda, Ihsen Alouani, Lobna Said, Ahmed Radwan

With the end of Moore's law, new paradigms are investigated for more scalable computing systems. One of the promising directions is to examine the data representation toward higher data density per hardware element. Multiple valued logic (MVL) emerged as a promising system due to its…

International Journal of Circuit Theory and Applications, 2022, 50 (10), pp.3682-3691. ⟨10.1002/cta.3340⟩. ⟨hal-03749121⟩

  • Article dans une revue

Broadband 3-D Shared Aperture High Isolation Nine-Element Antenna Array for On-Demand Millimeter-Wave 5G Applications

Mohammad Alibakhshikenari, Bal Virdee, Valeria Vadalà, Mariana Dalarsson, María Elena de Cos Gómez, Abdullah Alharbi, Shah Nawaz Burokur, Sonia Aïssa, Iyad Dayoub, Francisco Falcone, Ernesto Limiti

The paper presents the results of a novel 3-D shared aperture 3×3 matrix antenna-array for 26 GHz band 5 G wireless networks. Radiation elements constituting the array are hexagonal-shaped patches that are elevated above the common dielectric substrate by 3.35 mm and excited through a metallic rod…

Optik, 2022, 267, pp.169708. ⟨10.1016/j.ijleo.2022.169708⟩. ⟨hal-03739680⟩

  • Article dans une revue

In Situ Growth of PbS Nanoparticles without Organic Linker on ZnO Nanostructures via Successive Ionic Layer Adsorption and Reaction (SILAR)

Basma El Zein, Mutalifu Abulikemu, Ahmad Barham, Alia Al-Kilani, Mohammed Alkhatab, Samir Hamdan, El Hadj Dogheche, Ghassan Jabbour

The process of effective solar energy harvesting and conversion requires efficient photon absorption, followed by charge generation and separation, then electron transfer. Nanostructured materials have been considered as potential building blocks for the development of future generations of solar…

Coatings, 2022, 12 (10), pp.1486. ⟨10.3390/coatings12101486⟩. ⟨hal-03811473⟩

  • Article dans une revue

Acoustic Sensor Based on a Cylindrical Resonator for Monitoring a Liquid Flow

Abdellatif Gueddida, Yan Pennec, Ana Luiza Silveira Fiates, Michael Johannes Vellekoop, Bernard Bonello, Bahram Djafari-Rouhani

We present a numerical investigation of an acoustic sensor based on a cylindrical resonator to monitor the acoustic properties of liquids flowing in a tube. The sensor design consists of a hollow cylindrical washer surrounding the tube, which carries the liquid, and which can be filled during the…

Crystals, 2022, 12 (10), 1398, 12 p. ⟨10.3390/cryst12101398⟩. ⟨hal-03815230⟩

  • Article dans une revue

Influence of graphene oxide on the toxicity of polystyrene nanoplastics to the marine microalgae Picochlorum sp.

Gamze Yesilay, Layla Hazeem, Mohamed Bououdina, Demet Cetin, Zekiye Suludere, Alexandre Barras, Rabah Boukherroub

Graphene oxide (GO) features distinctive physical and chemical characteristics; therefore, it has been intensively investigated in environmental remediation as a promising material for clean-up of soil contamination and water purification and used as immobilization material. Plastic is a widespread…

Environmental Science and Pollution Research, 2022, 29, pp.75870-75882. ⟨10.1007/s11356-022-21195-w⟩. ⟨hal-03689555⟩

  • Article dans une revue

Development of a Broadband (100–240 MHz) Surface Acoustic Wave Emitter Devoted to the Non-Destructive Characterization of Sub-Micrometric Thin Films

Marc Duquennoy, Nikolay Smagin, Tahar Kadi, Mohammadi Ouaftouh, Frédéric Jenot

In the ultrasonic non-destructive evaluation of thin films, it is essential to have ultrasonic transducers that are able to generate surface acoustic waves (SAW) of suitably high frequencies in a wide frequency range of between ten and several hundred megahertz. If the characterization is carried…

Sensors, 2022, 22 (19), pp.7464. ⟨10.3390/s22197464⟩. ⟨hal-03822957⟩

  • Article dans une revue

Breakdown mechanism of AlGaN/GaN HEMT on 200-mm silicon substrate with silicon implant-assisted contacts

Antoine Chanuel, Yveline Gobil, Chuan Lun Hsu, Matthew Charles, Marianne Coig, Jerome Biscarrat, Francois Aussenac, N. Defrance, Christophe Gaquière, Fred Gaillard, Erwan Morvan

We present an access technology suitable for scaled gallium nitride (GaN) high electron mobility transistor (HEMT) in Ka -band. The comparison between OFF-state characteristics of a silicon implant-assisted contact and a conventional recessed Ti/Al-based Ohmic contact is presented. The transistor…

IEEE Transactions on Electron Devices, 2022, 69 (10), pp.5530-5535. ⟨10.1109/TED.2022.3201837⟩. ⟨hal-03775876⟩

  • Article dans une revue

Train management in freight shunting yards: Formalisation and literature review

Samuel Deleplanque, Pierre Hosteins, Paola Pellegrini, Joaquin Rodriguez

This paper treats theoretical and practical aspects of train management in freight shunting yards. It is a literature survey extending the previous ones and presenting the new important papers published in the last decade. The operations realised in such yards are formalised by modelling them in…

IET Intelligent Transport Systems, 2022, 16 (10), pp.1286-1305. ⟨10.1049/itr2.12216⟩. ⟨hal-03736251⟩

  • Thèse

Design and synthesis of high-performance nanomaterials for electrochemical water splitting, Conception et synthèse de nanomatériaux performants pour la séparation électrochimique de l'eau

Yuanyuan Miao

In thesis, we have designed and developed high-efficiency, high-stability, and cost-effective electrocatalysts using a facile and environmentally friendly process. Firstly, we developed an ultrathin hierarchical P-doped MoS2/Ni3S2 heterostructure on nickel foam (NF) by one-pot synthesis. Owing to…, Dans cette thèse, nous avons conçu et développé des électrocatalyseurs à hauts rendement et stabilité et à faible cout en utilisant des méthodes simples et non polluantes. Dans un premier temps, nous avons développé une hétérostructure MoS2/Ni3S2 hiérarchisée ultrafine dopée P sur le mousse de…

Micro and nanotechnologies/Microelectronics. Université de Lille, 2022. English. ⟨NNT : 2022ULILN019⟩. ⟨tel-04761203⟩