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Certains objets sont très difficiles à recycler parce qu'ils sont faits de nombreuses couches de différents matériaux : baskets, panneaux photovoltaïques ou batteries. Au laboratoire ICMCB à Bordeaux, une équipe de chercheurs utilise les fluides supercritiques pour séparer les éléments. C'est un domaine entre le solide et le gazeux où les propriétés des matériaux sont étonnantes et promettent de belles avancées dans le recyclage des déchets...

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Recycler grâce aux fluides supercritiques
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Portrait de Jeanne Crassous, médaille d'argent du CNRS 2023, directrice de recherche à l'Institut des sciences chimiques de Rennes, où elle explore différents aspects de la chiralité. Les recherches de Jeanne Crassous s'articulent autour des énantiomères, des paires de molécules constituées des mêmes atomes, mais dont la structure 3D est l'image miroir l'une de l'autre. Le phénomène s'appelle la chiralité. Jeanne Crassous suit cette voie depuis l'obtention, en 1996, d'un doctorat…

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Médaille d'Argent 2023 : Jeanne Crassous, chercheuse en chimie moléculaire
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Could it be that water contains an almost inexhaustible source of energy, and above all, that it is within everyone's reach? And what if hydrogen would redefine the contours of our future? Faced with global climate change, the quantities of CO2 from industry and transportation that are released into the atmosphere are widely blamed. In order for humanity and the planet to imagine a viable future by 2100, it is urgent to find a sustainable alternative to our fossil fuels. And in this quest for…

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Hydrogen The green revolution?
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Portraits de Jacques Marteau et Denis Spitzer, lauréats de la médaille de l'innovation 2022 du CNRS. Jacques Marteau, pionnier de l'imagerie par muons « En tant que physicien des particules, être reconnu pour une application industrielle de mes recherches est inattendu ! », reconnaît Jacques Marteau de l'Institut de physique des deux infinis de Lyon (CNRS/Université Claude Bernard Lyon 1). Pourtant, « grâce à une succession de belles rencontres…

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Jacques Marteau et Denis Spitzer, médailles de l'innovation 2022
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Aujourd'hui, 90 % des médicaments, dont près de 40 % des anticancéreux, se dissolvent de manière non-satisfaisante, ce qui gêne leur absorption et impose des doses élevées. Face à ce défi, Denis Spitzer a inventé au laboratoire Nanomatériaux pour les systèmes sous sollicitations extrêmes (CNRS/Institut franco-allemand de recherches Saint Louis/Université de Strasbourg) deux procédés qui facilitent l'étude, la formulation et la production de particules d'une taille en-dessous du micron qu'aucun…

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Médaille de l'innovation 2022 : Denis Spitzer, des procédés sans précédent pour des poudres ultrafines
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Portrait de Valérie Pichon, médaille d'argent du CNRS 2022, professeure à Sorbonne Université et membre de l'unité Chimie biologie innovation, experte dans le développement de stratégies analytiques pour la quantification de molécules et d'ions à l'état de traces dans des échantillons complexes. Dans ses premiers travaux, Valérie Pichon s'est essentiellement consacrée à l'analyse des polluants organiques dans les milieux naturels, avant d'élargir à des domaines comme la santé, la…

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Médaille d'argent 2022 : Valérie Pichon, chimie analytique
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Présentation des lauréats du Cristal collectif du CNRS 2022. Livré en avril 2021, le bâtiment Chimie Balard Recherche à Montpellier accueille depuis janvier 2022 l'ensemble des personnels et des équipements de recherche de deux unités qui développent la chimie de demain. Grâce à l'implication et à la synergie de chacun des membres de l'équipe, l'aménagement et le déménagement du nouveau bâtiment ont permis l'installation de plus de 800 personnes en quelques mois. Il aura…

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Cristal collectif 2022 : Aménagement et déménagement du bâtiment Chimie Balard Recherche
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Né en 1953 à Marmande dans le Lot-et-Garonne, Jean-Marie Tarascon est un spécialiste de la chimie du solide et d'électrochimie. Membre de l'Académie des sciences depuis 2004, il intègre le Collège de France en 2014. Tout au long de sa carrière, il a su mener de front recherches fondamentales et applications de ses travaux, sans jamais faire de concession à l'excellence scientifique. Directeur du laboratoire Chimie du solide et de l'énergie (CNRS/Collège de France/Sorbonne Université), à…

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Médaille d'or 2022 : Jean-Marie Tarascon, chimiste
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Le 200ème laboratoire commun du CNRS, lancé fin novembre 2021, est le CR2ME : Centre de résonance magnétique électronique pour les matériaux et l'énergie. Ce nouveau Labcom est développé avec le groupe TotalEnergies et le laboratoire de spectroscopie pour les interactions, la réactivité et l'environnement (Lasire - CNRS/Université de Lille) pour développer des énergies nouvelles dans une optique de développement durable. C'est pour aller au coeur de la…

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200ème laboratoire commun du CNRS (Le) : CR2ME
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Some 90% of the digital information that exists today was created in the past two years! Data is generated at an increasingly fast rate and finding new materials able to capture this expanding digital world while using less energy has become a priority for many research laboratories around the world. The Jean Lamour Institute, in eastern France, has a state of the art nanotechnology equipment to take on this challenge...

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Future of memory (The)
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Tiamat designs, develops, and produces sodium-ion batteries in a standard industrial format. These batteries could mitigate some of the limitations of the lithium-ion batteries that currently prevail, such as charging speed, lifespan, and the cost of production. Located in Amiens (northern France), this young company emerged from the French Research Network on Electrochemical Energy Storage (RS2E) led by the CNRS, and now has a few dozen functional prototypes available. Some of them, including…

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Tiamat
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The green sea turtle is now facing a high risk of extinction. In order to protect it, we first need to understand it better. That is why, since 2013, a team of 40 researchers and volunteers have been diving in Martinican waters to catch these reptiles. Before releasing the turtles into the ocean, they have been equipping them with satellite tags, cameras and microchips. This marking system enables scientists to follow the turtles' migratory patterns, dive behaviour, and to study the…

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Equipped Turtles
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La série « La science au box-office » s'inspire des codes des bandes annonces hollywoodiennes pour vous faire partager les plus étonnantes études, découvertes et innovations scientifiques de notre époque. A la suite d'un cataclysme cosmique survenu dans une lointaine galaxie, un signal parcourt l'univers à la vitesse de la Lumière. Sur Terre, des équipes de scientifiques venus du Monde entier unissent leurs efforts pour percer son mystère.

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Signal (Le)
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Upon being awarded the 2017 CNRS Innovation Medal, Jean-Marie talks about his career and his taste for transmission and collaboration with younger generation researchers. Being a professor at the Collège de France and a specialist of solid-state electrochemistry, he is also the director of the solid-state and energy laboratory (laboratoire Chimie du solide et de l'énergie, a CNRS/Collège de France/Pierre and Marie-Curie University joint research unit). He first started to draw attention to…

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2017 CNRS Innovation Medal laureate: Jean-Marie Tarascon
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Electronic waste contains numerous precious metals, woven together. However, recent technical advances do not allow them to be efficiently recovered and processed. In Orléans, a group of ICAR, CEMHTI and BRMG researchers have developed a solution to this problem with the use of water, in what is known as a "supercritical" state. When this water is heated in a reactor it reaches extreme temperatures and has a powerful corrosive effect. The device was tested on circuit boards, with the aim of…

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Recycler l'électronique avec de l'eau...supercritique
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This video is an interview with Patrick Maestro, as a winner of the 2015 CNRS Innovation Medal. The 62 year-old chemist and a freshly appointed member of the French academy for technologies is a forerunning authority in material science. He has worked during his research on rare-earth based oxide compounds which are to be found now in low-consumption lamps (LEDs), that he had a major part in their making, in automotive post combustion catalysers or as dyes in plastics. With his 60 publications…

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2015 CNRS Innovation Medal laureate: Patrick Maestro
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To address the societal concerns raised by the impact of natural and artificial radioactivity on humans and the environment, seven laboratories of the National Institute of Nuclear Physics and Particle Physics (IN2P3) of the CNRS have pooled their resources to create a national platform for radioactivity analysis: the Becquerel Network. Patrick Chardon and Addil Sellam who are engineers in two of the seven network member laboratories explain its advantages. Enabling on-site interventions,…

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Becquerel network (The)
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With the short-term depletion of fossil fuels (oil, natural gas, coal, etc...) and the deterioration of our environment looming, the use of renewable power sources is becoming essential. The energy transition has thus become one of the major technological and scientific challenges of the 21st century, with non-carbon renewable power sources representing a major alternative to fossil fuels. However, their exceptional potential is strongly offset by the storage problems caused by the intermittent…

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Renewable energy and the storage challenge
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The use of fossil fuels takes part in the increase of greenhouse gases, and influences on the climate. Transports, especially cars, play an important part in this pollution. Thinking about the place of clean energies in tomorrow energetic choices is getting more and more necessary. This film gives an overview of the French research on hydrogen energy, applied to transports. It shows obstacles to the emergence of a mass market for hydrogen cars, solutions that loom in the laboratories and life…

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Hydrogen at the Wheel
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To what extent is photovoltaic energy used in France today? This film looks at various initiatives in progress. Photovoltaic energy from the sun is not just a pipe dream; combining chemistry and physics, it is a field with great potential, which is already being commercially developed. This new energy source is obtained by converting light from the sun into electricity in semi-conductor materials like silicon. The end goal is to produce photovoltaic modules cheaply and increase their…

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Super Photon for Maxi Watt
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For the first edition of the Cinémascience festival in Bordeaux a laboratory in Aquitaine is in the spotlight with Claude Delmas, as the director of the Institut de chimie de la matière condensée de Bordeaux (Bordeaux institute for condensed matter chemistry - ICMCB) presenting its activities. The ICMCB studies the properties of solid materials. Issues related to energy and the environment constitute one of its research lines. Jean-Claude Grenier works on fuel cells. Unlike conventional…

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Towards green energy...
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As chemical and sound pollution increases, the electric vehicle becomes a solution to urban transportation problems. In La Rochelle and Bordeaux, the city government has set an example. The idea comes in various forms - scooters, river boats, and delivery services. Industry and research organizations are actively involved. CNRS laboratories are carrying out research on battery components. The use of electric vehicles of many kinds is becoming widespread.

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Time is ripe (The) [2004]
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Seven researchers present the medical and biological applications of techniques originally developed in the field of physics.Sigrid Avrillier (Laboratoire de physique des lasers, Villetaneuse) describes a laser sensor which can be used to measure the oxygenation properties of tissues.Philippe Lanièce (Institut de physique nucléaire, Orsay) describes a high-resolution tomography system (TOHR) used to obtain an image of the brain of a small animal.Pascal Laugier (Laboratoire d'imagerie…

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Using the tools of physics in biology and medicine

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