Publicaciones

• ART

Picosecond acoustics versus tape adhesion test: Confrontation on a series of similar samples with a variable adhesion

A. Vital-Juarez, L. Roffi, J.-M. Desmarres, Arnaud Devos

A large number of methods have been developed to characterize the adhesion of a thin film to a substrate. Among them, tape test is still one of the most popular methods. Acoustic waves and especially ultra-high frequency acoustic waves are also sensitive to adhesion defects as they affect the way...

Surface and Coatings Technology, 2022, 448, pp.128926. ⟨10.1016/j.surfcoat.2022.128926⟩. ⟨hal-03814601⟩

• ART

Electro-Acoustic Properties of Scandium-Doped Aluminum Nitride (Sc_xAl_1-xN) Material and its Application to Phononic Crystal-Coupled SAW Devices

Fahima Arab, Fares Kanouni, Rafik Serhane, Yan Pennec, Zafer Özer, Khaled Bouamama

Within the framework of the Density Functional Theory, the elastic, dielectric, and piezoelectric coefficients of w-ScxAl1−xN material were investigated for scandium (Sc) concentrations x = 0 to 0.375. The electro-acoustic properties are used to investigate the frequency response of the SAW delay...

• ART

Terphenylthiazole-based self-assembled monolayers on cobalt with high conductance photo-switching ratio for spintronics

Vladimir Prudkovskiy, Imane Arbouch, Anne Léaustic, Pei Yu, Colin van Dyck, David Guérin, Stéphane Lenfant, Talal Mallah, Jérôme Cornil, Dominique Vuillaume

Two new photo-switchable terphenylthiazole molecules are synthesized and self-assembled as monolayers on Au and on ferromagnetic Co electrodes. The electron transport properties probed by conductive atomic force microscopy in ultra-high vacuum reveal a larger conductance of the light-induced closed...

Nanoscale, 2022, 14, pp.5725 - 5742. ⟨10.1039/d2nr00591c⟩. ⟨hal-03625458⟩

• ART

How to tame a free non-laminar Savart sheet into individual jets?

Sofiene Oulded Taled Salah, Ghada Chouk, Alexis Duchesne, Nicolas de Cock, Khaoula Abrougui, Frédéric Lebeau, Stéphane Dorbolo

In this article, we study the division of a non-laminar Savart sheet into individual jets by mean of local disturbances. We paint a precise portrait of a free non-laminar Savart sheet formed by the vertical impact of a jet on a horizontal disk, its evolution in the air and its break up. We then...

International Journal of Multiphase Flow, 2022, 152, pp.104032. ⟨10.1016/j.ijmultiphaseflow.2022.104032⟩. ⟨hal-03667794v2⟩

• ART

Low Buffer Trapping Effects above 1200 V in Normally off GaN-on-Silicon Field Effect Transistors

Idriss Abid, Youssef Hamdaoui, Jash Mehta, Joff Derluyn, Farid Medjdoub

We report on the fabrication and electrical characterization of AlGaN/GaN normally off transistors on silicon designed for high-voltage operation. The normally off configuration was achieved with a p-gallium nitride (p-GaN) cap layer below the gate, enabling a positive threshold voltage higher than...

Micromachines, 2022, III–V Compound Semiconductors and Devices, 13 (9), pp.1519. ⟨10.3390/mi13091519⟩. ⟨hal-03777891⟩

• COMM

High Breakdown Field and Low Trapping Effects up to 1400 V in Normally Off GaN‐on‐Silicon Heterostructures

Idriss Abid, Youssef Hamdaoui, Jash Mehta, F Medjdoub

In this study, we report on the development of a fully normally-off high electron mobility transistor (HEMT) gallium nitride on silicon (GaN-on-Si) heterostructures designed for high voltage operation. The normally-off configuration was achieved by means of a p-gallium nitride (p-GaN) cap layer...

• ART

Embroidered Spoof Surface Plasmon Polariton Transmission Line for Wireless Body Sensor Network

Ali Ghaddar, Baptiste Garnier, François Rault, Eric Lheurette, Ludovic Burgnies

A wearable Spoof Surface Plasmon Polariton Transmission Line (SSPP TL) operating at 2.45 GHz designed for embroidery production and on-body communication is proposed. The SSPP TL supports both even and odd modes launched by near field coupling with a dipole antenna perpendicular and parallel to the...

IET Microwaves Antennas and Propagation, 2022, 16 (4), pp.187-193. ⟨10.1049/mia2.12224⟩. ⟨hal-03592149⟩

• COMM

Étude expérimentale des bifurcations primaires et secondaires de suspensions en écoulement de Taylor-Couette

M. Moazzen, T. Lacassagne, V. Thomy, A. Bahrani

25emes Rencontres du non-linéaire 2022, Mar 2022, Paris, France. ⟨hal-03607787⟩

• ART

Facile and secure synthesis of porous partially fluorinated graphene employing weakly coordinating anion for enhanced high-performance symmetric supercapacitor

Ning Cao, Teng Wang, Rabah Boukherroub, Yinghui Cai, Yijiang Qin, Fashun Li, Peng Liu, Qingguo Shao, Mingle Liu, Xiaobei Zang

In this paper, porous partially fluorinated graphene (PFG) for supercapacitors (SCs) was fabricated by a mild and secure one-pot hydrothermal method utilizing weakly coordinating anion BF4− as the fluorine source. The hydrolysis rate of sodium fluoroborate was adjusted by controlling the reaction...

Journal of Materiomics, 2022, 8 (1), pp.113-122. ⟨10.1016/j.jmat.2021.04.012⟩. ⟨hal-03561669⟩

• ART

High speed, antenna-enhanced 10.3 μm quantum cascade detector

G. Quinchard, C. Mismer, M. Hakl, J. Pereira, Quyang Lin, Sylvie Lepilliet, V. Trinité, A. Evirgen, Emilien Peytavit, J. Reverchon, Jean-Francois Lampin, S Barbieri, A. Delga

The strong potential of intersubband detectors in the field of mid-infrared photodetection places this technology as a relevant alternative to HgCdTe detectors in the race for ultrafast operation. While their extremely short photocarrier's lifetime opens up possibilities of detection beyond...

Applied Physics Letters, 2022, 120 (9), pp.091108. ⟨10.1063/5.0078861⟩. ⟨hal-03598713⟩