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Affichage de 5891 à 5900 sur 16434

  • Article dans une revue

Ambipolar spin diffusion in p-type GaAs: A case where spin diffuses more than charge

Fabian Cadiz, V. Notot, J. Filipovic, D. Paget, C. Weber, L. Martinelli, A. Rowe, S. Arscott

We investigate the diffusion of charge and spin at 15 K in p-type GaAs, combining transient-grating and energy-resolved microluminescence measurements to cover a broad range of photoelectron density. At very low optical power, in a unipolar nondegenerate regime, charge and spin diffuse at the same...

Journal of Applied Physics, 2017, 122 (9), pp.095703. ⟨10.1063/1.4985831⟩. ⟨hal-02345440⟩

  • Communication dans un congrès

Passive UHF RFID system evaluation in a retail environment

Hadi Farhat, Plamen Iliev, Philippe Mariage, Nathalie Rolland

The work in this paper presents the study of the influence of a particular environment on the performances of passive UHF RFID tags attached to products presented in a retail store. The effects of the near-field environment and of the far field environment are successively and separately...

2nd International Multidisciplinary Conference on Computer and Energy Science (SpliTech), Jul 2017, Split, Croatia. pp.111-116. ⟨hal-03270105⟩

  • Communication dans un congrès

Finite element modeling of a piezoelectric slender bar transducer equipped with a multilayer backing for medical imaging applications

Nadia El Atlas, Abdelmajid Bybi, Hilal Drissi, Anne-Christine Hladky

The goal of this work is to investigate the impact of front and back matching layers properties on a piezoelectric slender bar transducer performances and to propose a novel multilayer backing absorber. Quarter-wavelength acoustic matching layers and backing are known as essential components to...

3rd International Conference on Electrical and Information Technologies (ICEIT), Nov 2017, Rabat, Morocco. ⟨10.1109/EITech.2017.8255284⟩. ⟨hal-03300126⟩

  • Article dans une revue

On demand electrochemical release of drugs from porous reduced graphene oxide modified flexible electrodes

Samia Boulahneche, Roxana Jijie, Alexandre Barras, Fereshteh Chekin, Santosh K Singh, Julie Bouckaert, Mohamed Salah Medjram, Sreekumar Kurungot, Rabah Boukherroub, Sabine Szunerits

Despite the advantages of an electrochemical control for drug release, only a handful of electrochemical-based release systems have been developed so far. We report herein on the development of an electrochemically activatable platform for on-demand delivery of drugs. It is based on flexible gold...

Journal of materials chemistry‎ B, 2017, 5 (32), pp.6557-6565. ⟨10.1039/C7TB00687J⟩. ⟨hal-01679631⟩

  • Communication dans un congrès

Experimental investigation of stochastic resonance in a 65 nm CMOS artificial neuron

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

This work proposes an experimental demonstration of the stochastic resonance, a phenomenon widely observed in biology using a 65 nm CMOS artificial neuron. The stochastic resonance has been revealed through two different statistical studies. Moreover, when optimal, a signal to noise ratio at the...

International Conference on Noise and Fluctuations (ICNF), Jun 2017, Vilnius, Lithuania. ⟨10.1109/ICNF.2017.7985962⟩. ⟨hal-03270101⟩

  • Article dans une revue

Selective Manipulation of Microscopic Particles with Precursor Swirling Rayleigh Waves

Antoine Riaud, Michael Baudoin, Olivier Bou Matar, Loic Becerra, Jean-Louis Thomas

Contactless manipulation of microparticles is demonstrated with single-beam acoustical tweezers based on precursor swirling Rayleigh waves. These surface waves degenerate into acoustical vortices when crossing a stack made of a fluid layer and its solid support, hence creating a localized...

Physical Review Applied, 2017, 7, pp.024007. ⟨10.1103/PhysRevApplied.7.024007⟩. ⟨hal-01519025⟩

  • Article dans une revue

Modeling and optimization of core/shell p-i-n Si/Si0.2Ge0.8 nanowire for photovoltaic

Fethi Benyettou, Abdelkader Aissat, Isabelle Berbezier, Jean-Pierre Vilcot

In this work we propose a modeling and simulation of core/shell p-i-n Si/Si0.2Ge0.8 nanowire for photovoltaic. In the first step of this work, we have compared the core/shell p-i-n homo-junction Si and heterojunction Si/Si0.2Ge0.8 Nanowire (NW) solar cell having a length of 3 mu m and a radius of 0...

Optik, 2017, 149, pp.246-251. ⟨10.1016/j.ijleo.2017.09.056⟩. ⟨hal-01694450⟩

  • Pré-publication, Document de travail

Capacitive microwave sensor for toxic vapor detection in an atmospheric environment

P. Bahoumina, H. Hallil, K Pieper, J. Lachaud, D. Rebière, C. Dejous, A. Abdelghani, Kamel Frigui, Stéphane Bila, D. Baillargeat, Q. Zhang, P. Coquet, E. Pichonat, H. Happy

This paper presents an inkjet printing capacitive microwave sensor for toxic vapor detection. The designed sensors were presented and fabricated with success. The experiments show sensitivity to ethanol vapor according to the S parameters. It is equal to 0.9 kHz/ppm and 1.3 kHz/ppm for the sensors...

2017. ⟨hal-02376883⟩

  • Article dans une revue

TUNING NEGATIVE DIFFERENTIAL RESISTANCE IN A SINGLE MOLECULE TRANSISTOR: DESIGNS OF LOGIC GATES AND EFFECTS OF VARIOUS OXYGEN-AND HYDROGEN-INDUCED DEFECTS

A Nasri, A Boubaker, B Hafsi, W Khaldi, A Kalboussi

In this paper, a theoretical study of Single Molecule Transistor (SMT) operating as a molecular field effect transistor (MFET) has been presented. We have applied the density functional theory (DFT) in conjugation with the non-equilibrium green's function (NEGF) formalism on a pentacene device...

Digest Journal of Nanomaterials and Biostructures , 2017. ⟨hal-04423069⟩

  • Communication dans un congrès

Détermination de l'état de mouillage aux échelles micro/nano par caractérisation acoustique haute fréquence.

Christophe Virgilio, Malika Toubal, Pierre Campistron, Vincent Thomy, Bertrand Nongaillard, Philippe Garnier, Lucile Broussous, Julien Carlier

Les ondes acoustiques ultrasonores dans la gamme du GHz sont exploitées dans les pour réaliser l'imagerie de propriétés élastiques à l'échelle microscopique. Il est, dans ce cas, possible d'obtenir une résolution de l'ordre du micromètre dans l'eau (comparable à la...

Congrès Français de Mécanique, CFM 2017, Aug 2017, Lille, France. pp.135157. ⟨hal-03465409⟩