Publicaciones

• Article dans une revue

Complexity of the hot carrier relaxation in Si nanowires compared to bulk

Jing Li, Yann-Michel Niquet, Christophe Delerue

We investigate the relaxation of hot carriers by emission of phonons in bulk Si and Si nanowires (NWs) with an identical atomistic methodology. The phonon scattering is strongly enhanced in NWs. At high excitation energy, the carrier cooling is faster in NWs than in bulk, mainly due to the coupling...

Physical Review B, 2017, 95 (20), pp.205401. ⟨10.1103/PhysRevB.95.205401⟩. ⟨hal-02015399⟩

• Article dans une revue

Iron minerals within specific microfossil morphospecies of the 1.88 Ga Gunflint Formation

Kevin Lepot, Ahmed Addad, Andrew H. Knoll, Jian Wang, David Troadec, Armand Béché, Emmanuelle J. Javaux

Problematic microfossils dominate the palaeontological record between the Great Oxidation Event 2.4 billion years ago (Ga) and the last Palaeoproterozoic iron formations, deposited 500-600 million years later. These fossils are often associated with iron-rich sedimentary rocks, but their affinities...

Nature Communications, 2017, 8, ⟨10.1038/ncomms14890⟩. ⟨insu-03688102⟩

• Proceedings/Recueil des communications

Non destructive evaluation of bi-material structures: a case study

Lynda Chehami, Nico F. Declercq, Paul Lohmuller, Pascal Pomarede, Boris Pitrowski, Fodil Meraghni, Esam Ahmed Mohamed, Othmane Ez-Zahraouy

Due to their specific elastic properties (high stiffness to mass ratio), regular microstructure materials (architectural materials), are widely used in industry. This work deals with nondestructive evaluation of a 3D bi-material structure made of an architectural ABS polymer embedded in an Epoxy...

pp.045002, 2017, ⟨10.1121/2.0000608⟩. ⟨hal-02354065⟩

• Article dans une revue

Influence of neutron irradiation on electron traps induced by NGB stress in AlInN/GaN HEMTs

Sébastien Petitdidier, Yannick Guhel, Guillaume Brocero, Philippe Eudeline, Jean-Lionel Trolet, Patrick Mary, Christophe Gaquière, Bertrand Boudart

IEEE Transactions on Nuclear Science, 2017, pp.1 - 1. ⟨10.1109/TNS.2017.2708692⟩. ⟨hal-01645121⟩

• Article dans une revue

Energy Efficient Hardware and Improved Cluster-Tree Topology for Lifetime Prolongation in ZigBee Sensor Networks

Mourad Ouadou, Ouadoudi Zytoune, Yassin El Hillali, Atika Rivenq, Driss Aboutajdine

In wireless sensor networks, building energy-efficient systems is one of the major challenges. In such networks, nodes are usually supplied by low power and small batteries. Many factors are involved in the energy consumption, and this issue may be considered as a cross-layer problem, from the...

Journal of sensor and actuator networks, 2017, 6 (4), pp.22. ⟨10.3390/jsan6040022⟩. ⟨hal-03528721⟩

• Article dans une revue

Simulation Study of the Localization of a Near-Surface Crack Using an Air-Coupled Ultrasonic Sensor Array

Steven Delrue, Vladislav Aleshin, Mikael Sørensen, Lieven Lathauwer

The importance of Non-Destructive Testing (NDT) to check the integrity of materials in different fields of industry has increased significantly in recent years. Actually, industry demands NDT methods that allow fast (preferably non-contact) detection and localization of early-stage defects with...

Sensors, 2017, 17 (4), pp.930. ⟨10.3390/s17040930⟩. ⟨hal-05479947⟩

• Article dans une revue

3D patterning of silicon by contact etching with anodically biased nanoporous gold electrodes

Encarnación Torralba, Mathieu Halbwax, Taha El Assimi, Marin Fouchier, Vincent Magnin, Joseph Harari, Jean-Pierre Vilcot, Sylvain Le Gall, Raphaël Lachaume, Christine Cachet-Vivier, Stéphane Bastide

A novel strategy to achieve 3D pattern transfer into silicon in a single step without using lithography is presented. Etching is performed electrochemically in HF media by contacting silicon with a positively biased, patterned, metal electrode. Dissolution is localized at the Si/metal contacts and...

Electrochemistry Communications, 2017, 76, pp.79-82. ⟨10.1016/j.elecom.2017.01.014⟩. ⟨hal-01480682⟩

• Article dans une revue

Theoretical and experimental study of a thermal damper based on a CNT/PCM composite structure for transient electronic cooling

Christophe Kinkelin, Stéphane Lips, Ulrich Soupremanien, Vincent Remondière, Jean Dijon, Hélène Le Poche, Emmanuel Ollier, Malek Zegaoui, Nathalie Rolland, Paul-Alain Rolland, Sandrine Lhostis, Brigitte Descouts, Yann Kaplan, Frédéric Lefèvre

The present study focuses on a thermal damper that aims at smoothing the temperature peaks experienced by electronic components during transient solicitations. It consists of a silicon casing containing a densified or undensified carbon nanotube (CNT) array - linking directly both sides of the...

Energy Conversion and Management, 2017, 142, pp.257-271. ⟨10.1016/j.enconman.2017.03.034⟩. ⟨hal-01494833⟩

• Article dans une revue

Core–shell structured reduced graphene oxide wrapped magnetically separable rGO@CuZnO@Fe₃O₄ microspheres as superior photocatalyst for CO₂ reduction under visible light

P. Kumar, C. Joshi, Alexandre Barras, B. Sieber, A. Addad, L. Boussekey, Sabine Szunerits, Rabah Boukherroub, S. Jain

A highly efficient, recyclable and magnetically separable core-shell structured CuZnO@Fe₃O₄ microsphere wrapped with reduced graphene oxide (rGO@CuZnO@Fe₃O₄) photocatalyst has been developed and used for the...

• Communication dans un congrès

Ultra low power analog design and technology for artificial neurons

Francois Danneville, Ilias Sourikopoulos, Sara Hedayat, Christophe Loyez, Virginie Hoel, A. Cappy

In a context of the end of Moore's law, energy dissipation constitutes a real challenge. Among the new energy efficient paradigms for data processing, bio-inspired computing is very promising, moreover introducing cognitive characteristics. As applications at very high scale are addressed, the...

BCTM 2017, IEEE Bipolar/BiCMOS Circuits and Technology Meeting, Oct 2017, Miami, United States. paper 1.1, 1-8, ⟨10.1109/BCTM.2017.8112899⟩. ⟨hal-03270088⟩