Publicaciones

Affichage de 1271 à 1280 sur 16055

ART

Highly Conductive Tungsten Suboxide Nanotubes

Cécile Huez, Maxime Berthe, Florence Volatron, Jean-Michel Guigner, Dalil Brouri, Lise-Marie Chamoreau, Benoît Baptiste, Dominique Vuillaume, Anna Proust

We demonstrate a high electron conductivity (> 10^2 S/cm and up to 10^3 S/cm) of tungsten suboxide W18O(52.4-52.9)(or equivalently WO(2.91-2.94)) nanotubes (2 to 3 nm in diameter, ca. micrometer long). The conductivity is measured in the temperature range 120 to 300K by a four probe scanning...

Journal of Applied Physics, 2023, 134, pp.134301. ⟨10.1063/5.0170761⟩. ⟨hal-04178947v2⟩

ART

Engineering Refractive Index Contrast in Thin Film Barium Titanate-on-Insulator

Yu Cao, Haidong Liang, Hong-Lin Lin, Luo Qi, Ping Yang, Xuanyao Fong, El Hadj Dogheche, Andrew Bettiol, Aaron Danner

Barium titanate-on-insulator has demonstrated excellent vertical optical confinement, low loss, and strong electro-optic properties. To fabricate a waveguide-based device, a region of higher refractive index must be created to confine a propagating mode, one way of which is through dry etching to...

Nano Letters, 2023, 23 (16), pp.7267-7272. ⟨10.1021/acs.nanolett.3c00933⟩. ⟨hal-04182180⟩

ART

Enhanced Alkaline Hydrogen Evolution on Gd1.0/Ndx (x = 0.5, 1.0, 3.0, and 6.0%)-Doped TiO2 Bimetallic Electrocatalysts

Mohammed Alsawat, Naif Ahmed Alshehri, Abdallah Shaltout, Sameh Ahmed, Hanan Al-Malki, Manash Das, Rabah Boukherroub, Mohammed Amin, Mohamed Ibrahim

The work reports a facile synthesis of high thermally stable nanocrystalline anatase TiO2 nanoparticles (NPs) doped with different atomic concentrations (0.5, 1.0, 3.0, and 6.0%) of Gd3+ and Nd3+ ions by a template-free and one-step solvothermal process, using titanium(IV) butoxide as a titanium...

Catalysts, 2023, 13 (8), pp.1192. ⟨10.3390/catal13081192⟩. ⟨hal-04199822⟩

ART

High Breakdown Voltage GaN Schottky Diodes for THz Frequency Multipliers

G. Di Gioia, E. Frayssinet, M. Samnouni, V. Chinni, P. Mondal, J. Treuttel, X. Wallart, M. Zegaoui, Guillaume Ducournau, Yannick Roelens, Yvon Cordier, Mohamed Zaknoune

Quasi-vertical gallium nitride (GaN) Schottky diodes on silicon carbide (SiC) substrates were fabricated for frequency multiplier applications. The epitaxial structure employed had an n− layer of 590 nm with doping 6.6 × 1016 cm−3, while the n+ layer was 950 nm thick, with doping 2 × 1019 cm−3....

Journal of Electronic Materials, 2023, 52, pp.5249-5255. ⟨10.1007/s11664-023-10499-3⟩. ⟨hal-04115301⟩

ART

An efficient cobalt-nickel phosphate positive electrode for high-performance hybrid microsupercapacitors

Min Li, Chen Jia, Danyu Zhang, Yunyun Luo, Yintao Ma, Guoxi Luo, Libo Zhao, Lu Wang, Zhikang Li, Qijing Lin, Ping Yang, Nan Zhu, Rabah Boukherroub, Zhuangde Jiang

Flexible energy storage devices play significant role in wearable and portable electronics. Herein, a cobalt-nickel phosphate (CoNiP2O7) composite was synthesized on conductive carbon nanotubes (CNTs) substrate by facile one-step electrochemical deposition method, forming a binder-free CoNiP2O7@...

Journal of Energy Storage, 2023, 64, pp.107144. ⟨10.1016/j.est.2023.107144⟩. ⟨hal-04068689⟩

COMM

EME-GAN: A Conditional Generative Adversarial Network based Indoor EMF Exposure Map Reconstruction

Mohammed Mallik, Benjamin Allaert, Angesom Tesfay, Davy Gaillot, Joe Wiart, Laurent Clavier

New wireless communication technologies are developing exponentially. Meanwhile, concerns have arisen about the possible negative health effects of radiofrequency electromagnetic waves. This paper proposes a method based on a conditional generative adversarial network for the mapping of exposure to..., Les nouvelles technologies de communication sans fil se développent de façon exponentielle. Parallèlement des craintes sont apparues concernant de possibles effets délétères des ondes électromagnétiques de type radiofréquence sur la santé. Cet article propose une méthode basée sur un réseau...

29Â Colloque sur le traitement du signal et des image, GRETSI - Groupe de Recherche en Traitement du Signal et des Images, Aug 2023, Grenoble, France. pp.745-748. ⟨hal-04210419⟩

ART

Solid-Electrolyte-Free O3-LixTiS2 Cathode for High-Energy-Density All-Solid-State Lithium-Metal Batteries

Benjamin Hennequart, Michael Deschamps, Ronan Chometon, Bernhard Leube, Romain Dugas, Elisa Quemin, Pierre-Etienne Cabelguen, Christophe Lethien, Jean-Marie Tarascon

Composites made of high-capacity and high-potential LiNixMnyCo1–x–yO2 (NMC) lamellar transition-metal oxides and S-based ionic conductors are primarily used as positive electrodes in all-solid-state batteries (ASSBs). However, NMC coatings are necessary to prevent the chemical reactivity of oxygen...

ACS Applied Energy Materials, 2023, 6 (16), pp.8521-853. ⟨10.1021/acsaem.3c01383⟩. ⟨hal-04187062⟩

ART

Polysaccharides, proteins, and synthetic polymers based multimodal hydrogels for various biomedical applications: A review

Anuj Kumar, Ankur Sood, Garima Agrawal, Sourbh Thakur, Vijay Kumar Thakur, Masaru Tanaka, Yogendra Kumar Mishra, Graham Christie, Ebrahim Mostafavi, Rabah Boukherroub, Dietmar Hutmacher, Sung Soo Han

Nature-derived or biologically encouraged hydrogels have attracted considerable interest in numerous biomedical applications owing to their multidimensional utility and effectiveness. The internal architecture of a hydrogel network, the chemistry of the raw materials involved, interaction across...

International Journal of Biological Macromolecules, 2023, 247, pp.125606. ⟨10.1016/j.ijbiomac.2023.125606⟩. ⟨hal-04186707⟩

ART

Modeling for nonlinear acoustic imaging of an isolated crack via standing waves in a 2D solid

Vladislav Aleshin, Ravi Verma, Kevin Truyaert

AbstractThis paper is concerned with numerical modeling for nondestructive imaging of defects in solids via standing waves excited by a periodic sinewave signal. The stationary solution, purely sinusoidal in an intact sample, contains higher harmonics when damage is present. These harmonics are...

Ultrasonics, 2023, 133, pp.107023. ⟨10.1016/j.ultras.2023.107023⟩. ⟨hal-04107466⟩

ART

Sensor-Location-Specific Joint Acquisition of Peripheral Artery Bioimpedance and Photoplethysmogram for Wearable Applications

Margus Metshein, Anar Abdullayev, Antoine Gautier, Benoit Larras, Antoine Frappe, Barry Cardiff, Paul Annus, Raul Land, Olev Märtens

Background: Cardiovascular diseases (CVDs), being the culprit for one-third of deaths globally, constitute a challenge for biomedical instrumentation development, especially for early disease detection. Pulsating arterial blood flow, providing access to cardiac-related parameters, involves the...

Sensors, 2023, Special Issue Use of Smart Wearable Sensors and AI Methods in Providing P4 Medicine, 23 (16), pp.7111. ⟨10.3390/s23167111⟩. ⟨hal-04195296⟩