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Affichage de 1441 à 1450 sur 16106

Article dans une revue

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⟩

Article dans une revue

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⟩

Article dans une revue

Highly Si‐doped GaN regrown by MOVPE for ohmic contact applied to quaternary barrier based HEMT

Charles Pitaval, Cédric Lacam, N. Defrance, Christophe Gaquière, Nicolas Michel, Olivier Parillaud, Sylvain Delage

The quaternary barrier InAlGaN is suitable for GaN HEMT power microwave applications. High doping of semiconductor under the drain and source is a known suitable solution to achieve low ohmic contact resistance. However, InAlGaN quaternary alloys require low thermal budget to avoid indium...

Physica Status Solidi A (applications and materials science), 2023, 220 (16), pp.2200476. ⟨10.1002/pssa.202200476⟩. ⟨hal-03875911⟩

Article dans une revue

Saturated long chain fatty acids as possible natural alternative antibacterial agents: opportunities and challenges

Helena Arellano, Véronique Nardello-Rataj, Sabine Szunerits, Rabah Boukherroub, Anne-Laure Fameau

The spread of new strains of antibiotic-resistant pathogenic microorganisms has led to the urgent need to discover and develop new antimicrobial systems. The antibacterial effects of fatty acids have been well-known and recognized since the first experiments of Robert Koch in 1881, and they are now...

Advances in Colloid and Interface Science, 2023, 318, pp.102952. ⟨10.1016/j.cis.2023.102952⟩. ⟨hal-04155565⟩

Article dans une revue

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⟩

Article dans une revue

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⟩

Article dans une revue

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⟩

Article dans une revue

Charge-Dependent Flexural Rigidity of a Conductive Polymer Laminate for Bioinspired Non-thermal Compliance Modulation

Yauheni Sarokin, Vadim Becquer, Eric Cattan, Alvo Aabloo, Indrek Must

Material-level stiffness modulation allows for the creation of controllable energy-dissipating structures for auxiliary and training exoskeletons and the manipulation of delicate objects and tissues. These use cases require simple control systems and disfavour thermally driven solutions. Many...

Lecture Notes in Computer Science, 2023, Part of the book series: Lecture Notes in Computer Science, following Conference on Biomimetic and Biohybrid Systems, 14157, pp.109-116. ⟨10.1007/978-3-031-38857-6_8⟩. ⟨hal-05495756⟩

Communication dans un congrès

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⟩

Article dans une revue

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⟩