Simulations, measurements and optimization of OLEDs with scattering layer

A multi-scale optical model for organic light-emitting devices containing scattering layers is presented. This model describes the radiation of embedded oscillating dipoles and scattering from spherical particles. After successful model validation with experiments on a top-emitting white OLED, we show how this tool can be used for optimization with specific targets

Nanoantennes rectifiantes pour la conversion de lumière en électricité

Since Einstein's and De Broglie's works in the early XXth century, the double nature of light being a set of particles as well as a wave is admitted in the scientific community. Today, both solar energy production and light detection are based on the photovoltaic effect which relies on the corpuscular description of light. To investigate a new way to produce electricity out of light, the concept of rectifying antenna is derived from the wave description. As an electromagnetic wave, light can be haversted by an antenna just like a radiowave. Although the first theoretical descriptions of this phenomena go back to the late sixties, it has just been a decade since a few experimental demonstrations of rectifying antennas designed for visible and infrared light have been published. This is explained by the recent progresses of the nanofabrication processes. This thesis aim to propose an innovative design of rectifiying nanoantennas able to address the two main challenges which are: the fabrication of reproducible nanoantennas at the nanoscale; and the rectification of the alternative current which arises when light is absorbed in the nanoantennas.Depuis les travaux d’Einstein et de De Broglie au début du XXème siècle, il est admis que la lumière peut être décrite à la fois comme une onde ou comme un ensemble de particules appelées photons. La production d’énergie solaire et la détection de la lumière reposent aujourd’hui sur l’effet photovoltaïque qui exploite la description corpusculaire. Pour explorer une autre voie de transformation de lumière en électricité, le concept d’antenne rectifiante exploite cette fois la nature ondulatoire de la lumière. En tant qu’onde électromagnétique, la lumière peut être absorbée par une antenne à l’instar d’une onde radio. Les premiers arguments théoriques sur ce principe remontent à la fin des années soixante, mais ce n’est que depuis une dizaine d’années que les tentatives de réalisation expérimentale d’antennes rectifiantes pour les fréquences du visible et du proche infrarouge voient le jour grâce aux progrès des méthodes de nanofabrication. L’objet de cette thèse est de proposer une conception innovante de nano-antennes rectifiantes qui réponde aux deux verrous technologiques principaux que sont la fabrication d’antennes à l’échelle nanométrique et la rectification du courant alternatif térahertz qui s’y établit lorsque la lumière y est absorbée. Cette proposition est accompagnée d’une étude théorique optique dont l’objectif est de fournir une compréhension fine de l’interaction lumière-matière dans les structures étudiées. La fabrication et la caractérisation de nano-antennes à partir de nanoparticules en solution colloïdales est ensuite détaillée et comparée aux modèles théoriques. Enfin, l’étude d’une diode moléculaire synthétisée sur mesure présente une solution pour combiner des propriétés mécaniques de greffage de nanoparticules et des propriétés électroniques de rectification à haute fréquence. L’approche multidisciplinaire de ce travail qui combine nanophotonique et électronique moléculaire ouvre une nouvelle perspective pour la réalisation d’un dispositif de conversion de lumière en électricité fondamentalement innovant

Evaluation of indoor photovoltaic power production under directional and diffuse lighting conditions

International audienc

Rôle de la composition protéique du plasma séminal dans la résistance osmotique des spermatozoïdes

National audienc

Optimize, Modulate, and Scale-up Resveratrol and Resveratrol Dimers Bioproduction in Vitis labrusca L. Cell Suspension from Flasks to 20 L Bioreactor

International audienceResveratrol and its oligomers are biologically active compounds. This work brings newinsights for the bioproduction of trans-resveratrol with three dimers, pallidol, trans-"-viniferin, andtrans--viniferin, in cell suspension of Vitis labrusca. Conditions of elicitation by methyl jasmonatewere optimized for the production of stilbenes using statistical design of experiment. Bio-productionof stilbenes was scaled-up to 5 L and in these conditions, trans-resveratrol concentrations reached237 mg/L, and for pallidol 114 mg/L. The comparison of dierent elicitation modes (dierent elicitors,combination with cyclodextrins or adsorbent resin) allowed to reach particularly high concentrationsof target molecules: Resveratrol 6.14 g/L, pallidol 0.90 g/L, -viniferin 0.54 g/L, and "-viniferin0.50 g/L. Scale-up to 20 L-stirring-bioreactor gave similar growth rates to those observed in shakeflask culture, with a high production of resveratrol (4.23 g/L) and -viniferin (0.76 g/L). This workprovides new strategies for the production of stilbenes in plant cell suspension for biological andcommercial evaluation

Clinical impact of TERT somatic mutation in telomerase-related gene mutation carriers after lung transplantation

International audienceAlmost 25% of patients with pulmonary fibrosis referred for lung transplantation have a germline rare variant of a telomere-related gene. Acquired TERT promoter mutations may counterbalanced the germline defect and reduce the risk of hematological complications in this population. In a series of 34 patients with a germline telomere-related gene mutation who underwent lung transplantation, 12 (35%) patients had at least 1 acquired TERT promoter mutation. Six patients presented myelodysplasia before lung transplantation, with no difference between patients with and without an acquired TERT promoter mutation. After lung transplantation, myelodysplasia developed in only 1 of 8 patients with an acquired TERT promoter mutation versus 7 of 18 patients without a mutation. Survival did not differ between patients with and without an acquired mutation. The presence of an acquired TERT promoter mutation could be associated with reduced hematological complications after transplantation and with better outcome in telomere-related gene mutation carriers but requires further study. (C) 2022 International Society for Heart and Lung Transplantation

Clinical impact of TERT somatic mutation in telomerase-related gene mutation carriers after lung transplantation

International audienceAlmost 25% of patients with pulmonary fibrosis referred for lung transplantation have a germline rare variant of a telomere-related gene. Acquired TERT promoter mutations may counterbalanced the germline defect and reduce the risk of hematological complications in this population. In a series of 34 patients with a germline telomere-related gene mutation who underwent lung transplantation, 12 (35%) patients had at least 1 acquired TERT promoter mutation. Six patients presented myelodysplasia before lung transplantation, with no difference between patients with and without an acquired TERT promoter mutation. After lung transplantation, myelodysplasia developed in only 1 of 8 patients with an acquired TERT promoter mutation versus 7 of 18 patients without a mutation. Survival did not differ between patients with and without an acquired mutation. The presence of an acquired TERT promoter mutation could be associated with reduced hematological complications after transplantation and with better outcome in telomere-related gene mutation carriers but requires further study. (C) 2022 International Society for Heart and Lung Transplantation

Interception of exosomal messages between the oviduct and the embryo: What are they tweeting about?

International audienc

Plasmonic patch nanoantennas associated with ferrocene-based molecular diodes via clickchemistry

International audienc

Nouveau moyen innovant de rectifier le courant électrique grâce à des dérivés ferrocènyle triazole

International audienc