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DTSTART;TZID=Europe/Paris:20250405T080000
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UID:25964-1743840000-1750525200@www.chimieparistech.psl.eu
SUMMARY:Certificat H2 - Maîtriser les technologies de l’hydrogène et en déployer les usages
DESCRIPTION:Participez à notre Formation Continue conjointe entre Mines Paris-PSL\, Dauphine Paris-PSL et l’école. \nUn parcours certifiant pour identifier le potentiel et les opportunités de l’hydrogène comme vecteur énergétique. \nEn savoir plus ici
URL:https://www.chimieparistech.psl.eu/evenement-agenda/certificat-h2-maitriser-les-technologies-de-lhydrogene-et-en-deployer-les-usages/
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DTSTART;TZID=Europe/Paris:20250612T140000
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UID:27490-1749736800-1749744000@www.chimieparistech.psl.eu
SUMMARY:Séminaire Programme Gradué Chimie PSL
DESCRIPTION:Alexandra Bridarolli (C2RMF\, Center for Research and Conservation of the French Museums) for a SIMM seminar this Thursday June 12 at 2 pm in Amphi Charpak. The title of Alexandra’s talk is « Climate and Collections: Impact of Climatic Variations on the Mechanical Behavior of Heritage Materials ». \nClimate and Collections: Impact of Climatic Variations on the Mechanical Behavior of Heritage Materials\n\nIn the current climate crisis and rising energy prices\, museums\, archives and heritage collections are facing the same challenges as the rest of society: rethinking conservation\, exhibition and storage practices and finding sustainable\, low-energy solutions\, while preserving the objects in their collections. At the heart of these reflections lie questions about collection climate. How can strict temperature and relative humidity (RH) conditions be relaxed to reduce the associated energy consumption\, while maintaining the physical integrity of the objects? It has become essential to understand the impact of these climatic parameters (RH and temperature) on the mechanical and physical properties of materials\, in order to accurately model the mechanical behavior of heritage objects and predict the risks of irreversible degradation (deformation\, cracks\, breakage\, etc.).\n\nTo illustrate this point\, this presentation will present two complementary studies: one conducted in the laboratory\, the other in situ.\n\nThe first study focuses on seven animal glues (from mammals and fish)\, widely used in the making and conservation of art objects as adhesives or binders for a variety of applications: gluing furniture joints\, preparatory coats for paintings\, paper restoration\, etc. Prepared in film form\, these adhesives were subjected to dynamic mechanical analysis\, carried out under variable humidity and temperature conditions. This method enabled the precise identification of the phase transitions specific to each adhesive\, as well as their phase-specific viscoelastic and fracture properties. The results obtained make it possible to predict their mechanical behavior as a function of the environment\, thus facilitating the choice of the most suitable adhesive from a mechanical point of view\, depending on the intended use.\n\nThe second study highlights situations in which direct measurement on the work is the only relevant method for addressing specific issues. It is based on acoustic emission measurements carried out on a wooden altarpiece\, with the aim of assessing its sensitivity to the museum climate. This non-destructive technique makes it possible to detect the formation or enlargement of micro-cracks within the work\, often before they are even visible to the naked eye.\n\nIn both cases\, the data collected provided tangible evidence to help heritage professionals make the right decisions in the face of climatic and energy challenges.
URL:https://www.chimieparistech.psl.eu/evenement-agenda/seminaire-programme-gradue-chimie-psl-151/
LOCATION:amphi Charpak\, ESPCI Paris-PSL
CATEGORIES:Séminaire
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DTSTART;TZID=Europe/Paris:20250612T150000
DTEND;TZID=Europe/Paris:20250612T170000
DTSTAMP:20250610T084903Z
CREATED:20250610T084903Z
LAST-MODIFIED:20250610T084903Z
UID:27480-1749740400-1749747600@www.chimieparistech.psl.eu
SUMMARY:Séminaire Programme Gradué Chimie PSL
DESCRIPTION:Universal Features of Emergent Electronic Fractals in Quantum Material by Erica W. Carlson\, Department of Physics and Astronomy\, Purdue University\, at ESPCI\, Room Charpak\, entrance building\, ground floor.  \nElectrons inside of many quantum materials spontaneously form clumpy patterns on multiple length scales. By importing techniques from disordered statistical mechanics into the field of quantum materials\, we have defined new conceptual frameworks for understanding and controlling this electronic inhomogeneity. This allows us to use the rich information available from spatially resolved probes to diagnose criticality from the spatial structure alone\, without the need of a sweep of temperature or external field. These new methods have enabled the discovery of universal\, fractal electronic textures across a variety of quantum materials. For instance\, scanning tunneling microscopy on BSCO reveals that the orientations of electronic stripes in that material form fractal\, self similar patterns displaying power law behavior throughout the superconducting doping range [1]\, leading to a connected scaffolding on which superconductivity can arise. Surprisingly similar structures are also found in antiferromagnetic domains in NdNiO3 and the Mott metal-insulator transition in VO2. In NdNiO3\, scanning resonant magnetic X-ray scattering reveals a highly textured magnetic fabric\, establishing a self-similar network of antiferromagnetic domains [2]. In VO2\, both scanning near-field optical microscopy and far-field optical microscopy have revealed that as opposed to transitioning from insulator to metal all at once\, VO2 forms an intricate\, fractal network of metallic puddles that extend like filigree over a wide range of temperatures [3]. This identification opens the door to using hysteresis effects to sculpt the filigree\, in order to improve the function of VO2 in novel electronic applications such as neuromorphic devices and quantum sensing. The universal features of these fractal electronic textures across a disparate collection of quantum materials hints at a common origin. We show that this emergent electronic complexity is the result of proximity to a critical point arising from the combined effects of quenched disorder and interactions. \n[1] Nature Commun. 14\, 2622 (2023). [2] Nature Commun. 10\, 4568 (2019). [3] Phys. Rev. B 107\, 205121 (2023) \nZoom link: https://espci.zoom.us/j/81810662551?pwd=LShnlG1BX0BlaNtUZnWjHaoMa4vMLM.1ID: 818 1066 2551Passcode: Max_Planck
URL:https://www.chimieparistech.psl.eu/evenement-agenda/seminaire-programme-gradue-chimie-psl-149/
LOCATION:amphi Charpak\, ESPCI Paris-PSL
CATEGORIES:Séminaire
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