Publicaciones

• ART

Asymmetric Optical Transitions Determine the Onset of Carrier Multiplication in Lead Chalcogenide Quantum Confined and Bulk Crystals

Frank Spoor, Gianluca Grimaldi, Christophe Delerue, Wiel Evers, Ryan Crisp, Pieter Geiregat, Zeger Hens, Arjan J Houtepen, Laurens Siebbeles

Abstract Carrier multiplication is a process in which one absorbed photon excites two or more electrons. This is of great promise to increase the efficiency of photovoltaic devices. Until now, the factors that determine the onset energy of carrier multiplication have not been convincingly explained...

ACS Nano, 2018, 12 (5), pp.4796-4802. ⟨10.1021/acsnano.8b01530⟩. ⟨hal-02133328⟩

• COMM

[Invited] Changes and methods for exploring the histories and philosophies of the exact sciences

Raffaele Pisano

History of science in Italy and abroad SISFA & La sapienza University, Roma, 20-21 avril., SISFA & La sapienza University, Roma, 20-21 April, Apr 2018, Roma Sapienza Università, Italy. ⟨hal-04518366⟩

• ART

Dense Brushes of Tilted Metallic Nanorods Grown onto Stretchable Substrates for Optical Strain Sensing

Joseph Marae-Djouda, Arthur Gontier, Roberto Caputo, Gaëtan Lévêque, Bogdan Bercu, Yazid Madi, Guillaume Montay, Pierre-Michel Adam, Michaël Molinari, Stephen Stagon, Thomas Maurer

This study aims to investigate the potential of small densely packed tilted Au nanorods grown on a flexible substrate by physical vapor deposition for strain sensing. By exciting the rods with linearly polarized white light that is perpendicularly impinging onto the sample substrate, interesting...

ACS Applied Nano Materials, 2018, 1 (5), pp.2347-2355. ⟨10.1021/acsanm.8b00441⟩. ⟨hal-02276671⟩

• COMM

[Invited] Current status and challenges of GaN millimeter-wave transistors

Riad Kabouche, Romain Pecheux, Malek Zegaoui, F Medjdoub

In this work, we show that a careful architecture of buffer layers should be employed in order to perform high performance millimeter-wave GaN devices. The use of higher bias operation (VDS ≥ 20 V) will be possible while using short gate length only if the thermal resistance induced by the buffer...

GaN Marathon 2.0, Apr 2018, Padova, Italy. ⟨hal-03287817⟩

• ART

Oligomannose-Rich Membranes of Dying Intestinal Epithelial Cells Promote Host Colonization by Adherent-Invasive E. coli

Tetiana Dumych, Nao Yamakawa, Adeline Sivignon, Estelle Garénaux, Stefania Robakiewicz, Bernadette Coddeville, Antonino Bongiovanni, Fabrice Bray, Nicolas Barnich, Sabine Szunerits, Christian Slomianny, Martin Herrmann, Sébastien Gouin, Alexander Lutsyk, Luis Munoz, Frank Lafont, Christian Rolando, Rostyslav Bilyy, Julie Bouckaert

A novel mechanism is revealed by which clinical isolates of adherent-invasive Escherichia coli (AIEC) penetrate into the epithelial cell layer, replicate, and establish biofilms in Crohn's disease. AIEC uses the FimH fimbrial adhesin to bind to oligomannose glycans on the surface of host cells...

Frontiers in Microbiology, 2018, 9, ⟨10.3389/fmicb.2018.00742⟩. ⟨hal-01796957⟩

• COMM

Surface modification of stainless steel targeting dairy fouling mitigation

Sawsen Zouaghi, M. Barry, Séverine Bellayer, S. Moradi, Savvas G. Hatzikiriakos, Thomas Dargent, Vincent Thomy, Yannick Coffinier, Christophe Andre, Melissa A. Grunlan, Guillaume Delaplace, Maude Jimenez

Fouling and Cleaning in Food Processing 2018, Apr 2018, Lund, Sweden. ⟨hal-03173261⟩

• COMM

Profilage et modélisation de la consommation d’énergie dans un encodeur vidéo HEVC-intra dans le contexte des RCVSF de la nouvelle génération

Achraf Ait-Beni-Ifit, Othmane Alaoui-Fdili, Patrick Corlay, François-Xavier Coudoux, Mohammed El Hassouni, Driss Aboutajdine

La consommation d'énergie est l’une des principales préoccupations dans le domaine des réseaux de capteurs vidéo sans fil (RCVSF) où les ressources énergétiques sont limitées, consistant principalement de la batterie des nœuds capteurs qui détermine ainsi leur durée de vie. Dans cet article,...

Actes du 2ème Colloque National Signal, ImaGe, Multimédia et Applications, SIGMA 2018, Apr 2018, Rabat, Maroc. ⟨hal-03582693⟩

• COMM

From Outage Probability to ALOHA MAC Layer Performance Analysis in Distributed WSNs

Mohamed El Amine Seddik, Viktor Toldov, Laurent Clavier, Nathalie Mitton

In this paper we develop an explicit formula of outage probability in a distributed wireless sensor network (WSN), assuming the MAC layer protocol being a slotted-ALOHA. And adopting a Markovian approach, we develop a model that analyses the performance of the slotted-ALOHA in order to improve...

WCNC 2018 - IEEE Wireless Communications and Networking Conference, Apr 2018, Barcelona, Spain. ⟨hal-01677687⟩

• ART

Optimization of interdigital transducers for the generation of surface acoustic waves over a large bandwidth (20-125 MHz)

Dame Fall, Marc Duquennoy, Mohammadi Ouaftouh, Nikolay Smagin, Bogdan Piwakowski, Frédéric Jenot

In this paper, wideband interdigital transducers (IDT) to excite surface acoustic waves (SAW) have been developed and optimized. Three spatial chirp configurations were studied in order to cover a large bandwidth ranging from 20 to 125 MHz with sufficiently large displacement amplitudes to enable...

Sensors and Actuators A: Physical , 2018, 273, pp.303-310. ⟨10.1016/j.sna.2018.03.002⟩. ⟨hal-03183481⟩

• ART

Fully Integrated Interferometry-Based Reflectometer for High-Impedance Instrumentation

Pietro Maris Ferreira, Cora Donche, Emilie Avignon-Meseldzija, Thomas Quémerais, Frederic Gianessello, Daniel Gloria, Tuami Lasri, Gilles Dambrine, Christophe Gaquière

Microwave imaging of nanoelectronic devices has turned a simple reflection coefficient measurement, usually carried out by a 50-Ω vector-network analyzer, into a high-impedance instrumentation challenge. Interferometry-based reflectometers (IBR) have been found to be successful solutions in...

IEEE Transactions on Microwave Theory and Techniques, 2018, PP (99), pp.1-8. ⟨10.1109/TMTT.2018.2831699⟩. ⟨hal-01789805⟩