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Affichage de 5101 à 5110 sur 16092

Article dans une revue

Strain-Reduction Induced Rise in Channel Temperature at Ohmic Contacts of GaN HEMTs

Steven Duffy, Brahim Benbakhti, Karol Kalna, Mohammed Boucherta, Wei Zhang, Nour Eddine Bourzgui, Ali Soltani

ABSTRACT Operating temperature distributions in AlGaN/GaN gateless and gated devices are characterized and analyzed using the InfraScope temperature mapping system. For the first time, a substantial rise of channel temperature at the inner ends of ohmic contacts has been observed. Synchrotron…

IEEE Access, 2018, 6, pp.42721-42728. ⟨10.1109/ACCESS.2018.2861323⟩. ⟨hal-02273401⟩

Article dans une revue

Semi-analytical discontinuous Galerkin finite element method for the calculation of dispersion properties of guided waves in plates

Salah-Eddine Hebaz, Farouk Benmeddour, Emmanuel Moulin, Jamal Assaad

The development of reliable guided waves inspection systems is conditioned by an accurate knowledge of their dispersive properties. The semi-analytical finite element method has been proven to be very practical for modeling wave propagation in arbitrary cross-section waveguides. However, when it…

Journal of the Acoustical Society of America, 2018, 143 (1), pp.460-469. ⟨10.1121/1.5021588⟩. ⟨hal-02502385⟩

Article dans une revue

Design of a thin-plate based tunable high-quality narrow passband filter for elastic transverse waves propagate in metals

J. Zhang, L. H. Zeng, C. L. Hu, W. S. Yan, Yan Pennec, N. Hu

For the elastic SV (transverse) waves in metals, a high-quality narrow passband filter that consists of aligned parallel thin plates with small gaps is designed. In order to obtain a good performance, the thin plates should be constituted by materials with a smaller mass density and Young’s modulus…

AIP Advances, 2018, 8 (3), pp.035323. ⟨10.1063/1.5023517⟩. ⟨hal-03185617⟩

Article dans une revue

An extension of the RiMAX multipath estimation algorithm for ultra-wideband channel modeling

Brecht Hanssens, Emmeric Tanghe, Davy Gaillot, M. Lienard, Claude Oestges, David Plets, Luc Martens, Wout Joseph

This work presents an extension of the high-resolution RiMAX multipath estimation algorithm, enabling the analysis of frequency-dependent propagation parameters for ultra-wideband (UWB) channel modeling. Since RiMAX is a narrowband algorithm, it does not account for the frequency-dependency of the…

EURASIP Journal on Wireless Communications and Networking, 2018, 2018 (1), pp.164. ⟨10.1186/s13638-018-1177-3⟩. ⟨hal-03185604⟩

Article dans une revue

Spacetime representation of topological phononics

Pierre A. Deymier, Keith Runge, Pierre Lucas, Jerome O. Vasseur

Non-conventional topology of elastic waves arises from breaking symmetry of phononic structures either intrinsically through internal resonances or extrinsically via application of external stimuli. We develop a spacetime representation based on twistor theory of an intrinsic topological elastic…

New Journal of Physics, 2018, 20 (5), pp.053005. ⟨10.1088/1367-2630/aaba18⟩. ⟨hal-01802050⟩

Article dans une revue

Optimization of pentacene double floating gate memories based on charge injection regulated by SAM functionalization

S. Li, David Guérin, Stéphane Lenfant, K. Lmimouni

Pentacene based double nano-floating gate memories (NFGM) by using gold nanoparticles (Au NPs) and reduced graphene oxide (rGO) sheets as charge trapping layers are prepared and demonstrated. Particularly, the NFGM chemically treated by 2,3,4,5,6-pentafluorobenzenethiol (PFBT) self-assembled…

AIP Advances, 2018, 8 (2), pp.025110. ⟨10.1063/1.5010403⟩. ⟨hal-03185609⟩

Article dans une revue

Colloidal nanocrystals as LEGO® bricks for building electronic band structure models

Athmane Tadjine, Christophe Delerue

Abstract The synthesis of self-assembled semiconductor nanocrystal (NC) superlattices using oriented attachment recently became a flourishing research topic. This technique already produced remarkable forms of NC superlattices, such as linear chains, mono and multilayer square lattices, and…

Physical Chemistry Chemical Physics, 2018, 20 (12), pp.8177-8184. ⟨10.1039/C7CP08400E⟩. ⟨hal-02133332⟩

Article dans une revue

Perspective: organic electronic materials and devices for neuromorphic engineering

Sébastien Pecqueur, Dominique Vuillaume, F. Alibart

Neuromorphic computing and engineering has been the focus of intense research efforts that have been intensified recently by the mutation of Information and Communication Technologies (ICT). In fact, new computing solutions and new hardware platforms are expected to emerge to answer to the new…

Journal of Applied Physics, 2018, 124 (15), pp.151902. ⟨10.1063/1.5042419⟩. ⟨hal-02133792⟩

Article dans une revue

Improved photodynamic effect through encapsulation of two photosensitizers in lipid nanocapsules

Alexandre Barras, Nadia Skandrani, Mariano Gonzalez Pisfil, Solomiya Paryzhak, Tetiana Dumych, Aurélien Haustrate, Laurent Héliot, Tijani Gharbi, Hatem Boulahdour, V'Yacheslav Lehen'Kyi, Rostyslav Bilyy, Sabine Szunerits, Gabriel Bidaux, Rabah Boukherroub

Photodynamic therapy (PDT) has developed into a new clinical and non-invasive treatment for cancer over the past 30 years. By the combination of three non-toxic partners, i.e. a photosensitizer (PS), molecular oxygen (O2) and light, cytotoxic reactive oxygen species (ROS) are locally produced…

Journal of materials chemistry‎ B, 2018, 6 (37), pp.5949 - 5963. ⟨10.1039/c8tb01759j⟩. ⟨hal-01913367⟩

Article dans une revue

Gallium nitride MEMS resonators: how residual stress impacts design and performances

Christophe Morelle, Didier Theron, Joff Derluyn, Stefan Degroote, Marianne Germain, Victor Zhang, Lionel Buchaillot, Bertrand Grimbert, Pascal Tilmant, Francois Vaurette, Isabelle Roch-Jeune, Virginie Brandli, Vanessa Avramovic, Etienne Okada, Marc Faucher

Starting from Gallium Nitride epitaxially grown on silicon, pre-stressed micro-resonators with integrated piezoelectric transducers have been designed, fabricated, and characterized. In clamped-clamped beams, it is well known that tensile stress can be used to increase the resonant frequency. Here…

Microsystem Technologies, 2018, 24 (1), pp.371-377. ⟨10.1007/s00542-017-3293-0⟩. ⟨hal-03183510⟩