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Publications

Affichage des publications 641 à 650 sur 710 au total

Chimie

Main-Chain Oligomers from NiII- and CuII-Centered Unsymmetrical N2O2 Schiff-Base Complexes: Synthesis and Spectral, Structural, and Second-Order Nonlinear Optical Properties

Oligomeric main-chain Schiff-base compounds 4 and 5 have been synthesized by the trans-esterification of their respective doubly functionalized monomeric precursors [M{(η5-C5H5)Fe(η5-C5H4)C(=O)CH=C(4-C6H4OH)NCH2CH2N=CH-(2-O,4-CO2H–C6H3)}] [M = Ni (2…

Salvador Celedón, Vincent Dorcet, Thierry Roisnel, Anu Singh, Isabelle Ledoux-Rak, Jean-René Hamon, David Carrillo, Carolina Manzur

European Journal of Inorganic Chemistry -

Matière Condensée

Quantized Thermal Conductance of Nanowires at Room Temperature Due to Zenneck Surface-Phonon Polaritons

Based on the Landauer formalism, we demonstrate that the thermal conductance due to the propagation of Zenneck surface-phonon polaritons along a polar nanowire is independent of the material characteristics and is given by π 2 k 2 B T=3h. The giant…

Jose Ordonez-Miranda, Laurent Tranchant, Beomjoon Kim, Yann Chalopin, Thomas Antoni, Sebastian Volz

Physical Review Letters -

Optique

Electronic properties of 2D and 3D hybrid organic/inorganic perovskites for optoelectronic and photovoltaic applications

We herein investigate theoretically both 2D and 3D Hybrid Organic/inorganic Perovskite (HOP) crystal structures based on Density Functional Theory (DFT) calculations and symmetry analyses. Our findings reveal the universal features of the electronic…

Laurent Pedesseau, Jean-Marc Jancu, Alain Rolland, Emmanuelle Deleporte, Claudine Katan, Jacky Even

Optical and Quantum Electronics -

Matière Condensée

Thermal conductivity of nano-layered systems due to surface phonon-polaritons

The effective thermal conductivity of a layered system due to the propagation of surface phonon-polaritons is studied. We analytically demonstrate that the thermal conductivity of a set of nanolayers can be described as one of a single layer with an…

Jose Ordonez-Miranda, Laurent Tranchant, Yann Chalopin, Thomas Antoni, Sebastian Volz

Journal of Applied Physics -

Autre

Universal non-resonant absorption in carbon nanotubes

Photoluminescence excitation measurements in semi-conducting carbon nanotubes show a systematic non-resonant contribution between the well known excitonic resonances. Using a global analysis method, we were able to delineate the contribution of each…

Fabien Vialla, Ermin Malic, Benjamin Langlois, Yannick Chassagneux, Carole Diederichs, Emmanuelle Deleporte, Philippe Roussignol, Jean‐sébastien Lauret, Christophe Voisin

Physical Review B: Condensed Matter and Materials Physics (1998-2015) -

Matière Condensée

Effects of anisotropy and size of polar nano thin films on their thermal conductivity due to surface phonon-polaritons

The effects of the permittivity anisotropy and size of a nano thin film on its thermal conductivity due to surface phonon-polaritons are studied. We demonstrate that this thermal conductivity is a linear combination of the inverse first and third…

Jose Ordonez-Miranda, Laurent Tranchant, Beomjoon Kim, Yann Chalopin, Thomas Antoni, Sebastian Volz

Japanese Journal of Applied Physics, part 2 : Letters -

Matière Condensée

Confinement in single walled carbon nanotubes investigated by spectroscopic ellipsometry

Thick films of single walled carbon nanotubes (SWCNTs) with different diameter and chirality distributions are characterized by combining transmission electron microscopy and spectroscopic ellipsometry. The dependence of the dielectric function with…

Y. Battie, Damien Jamon, Jean‐sébastien Lauret, Qingyuan Gu, Maud Gicquel-Guézo, A. En Naciri, Annick Loiseau

Thin Solid Films -

Autre

Unifying the low-temperature photoluminescence spectra of carbon nanotubes: the role of acoustic phonon confinement.

At low temperature the photoluminescence of single-wall carbon nanotubes show a large variety of spectral profiles ranging from ultra narrow lines in suspended nanotubes to broad and asymmetrical line-shapes that puzzle the current interpretation in…

Fabien Vialla, Yannick Chassagneux, Robson Ferreira, Cyrielle Roquelet, Carole Diederichs, Guillaume Cassabois, Philippe Roussignol, Jean‐sébastien Lauret, Christophe Voisin

Physical Review Letters -

Chimie

Room Temperature Optically Tunability and Inhomogeneous Broadening in 2D-Layered Organic-Inorganic Perovskite Pseudobinary Alloys.

We focus here our attention on a particular family of 2D-layered and 3D hybrid perovskite molecular crystals, the mixed perovskites (C6H5–C2H4–NH3)2PbZ4(1–x)Y4x and (CH3–NH3)PbZ3(1–x)Y3x, where Z and Y are halogen ions such as I, Br, and Cl…

Gaetan Lanty, Khaoula Jemli, Yi Wei, Joël Leymarie, Jacky Even, Jean‐sébastien Lauret, Emmanuelle Deleporte

Journal of Physical Chemistry Letters -