BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//Chimie ParisTech - PSL - ECPv6.18.0//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-ORIGINAL-URL:https://www.chimieparistech.psl.eu
X-WR-CALDESC:Évènements pour Chimie ParisTech - PSL
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:Europe/Paris
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20240331T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20241027T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20250330T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20251026T010000
END:STANDARD
BEGIN:DAYLIGHT
TZOFFSETFROM:+0100
TZOFFSETTO:+0200
TZNAME:CEST
DTSTART:20260329T010000
END:DAYLIGHT
BEGIN:STANDARD
TZOFFSETFROM:+0200
TZOFFSETTO:+0100
TZNAME:CET
DTSTART:20261025T010000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20250403T140000
DTEND;TZID=Europe/Paris:20250403T160000
DTSTAMP:20250331T093356Z
CREATED:20250331T093356Z
LAST-MODIFIED:20250331T093356Z
UID:26979-1743688800-1743696000@www.chimieparistech.psl.eu
SUMMARY:Séminaire Programme Gradué Chimie PSL
DESCRIPTION:X-ray tomography and digital twins for the mechanics of materials by Henry PROUDHON (Mines PSL)-  Amphi Charpak\, ESPCI Paris-PSL à 14h.\n\nThe mechanical properties of materials\, essential to our modern world\, are largely determined by the three-dimensional arrangement of their microstructure. X-ray characterization techniques\, whether performed at synchrotron or in the laboratory\, now enable non-destructive\, in situ\, and correlative measurements of the microstructure of representative samples. These methods hold the promise to revolutionize materials characterization\, the study of deformation and fracture mechanisms and the identification of constitutive behaviors at the scale of the microstructure.\n\nThis presentation will detail the results of several studies that offer new insights into the deformation of polymer materials on one hand and crystal plasticity of metallic materials on the other hand. Different characterization modalities were combined\, such as diffraction and tomography for polymers\, and EBSD\, diffraction contrast tomography and topotomography for metals\, at various stages of tensile deformation. These techniques allow direct in situ observation of the formation of deformation structures in the material bulk. Furthermore\, 3D characterization facilitates the creation of a digital twin of the experiment\, thanks to finite element mechanical simulation methods. This opens the way to a new paradigm where experiments and simulations at the microstructure scale can be used together to study plasticity and identify the parameters of material laws.\n\n—\n\nTomographie aux Rayons X et jumeaux numériques pour la mécanique des matériaux\, Henry PROUDHON (Mines PSL)\, Amphi Charpak\, ESPCI Paris-PSL à 14h.\n\n\nLes propriétés mécaniques des matériaux\, essentielles à notre monde moderne\, sont largement déterminées par l’arrangement tridimensionnel de leur microstructure. Les techniques de caractérisation basées sur les rayons X\, qu’elles soient réalisées au synchrotron ou en laboratoire\, permettent des mesures non destructives\, in situ et corrélatives de la microstructure d’échantillons représentatifs. Ces méthodes promettent de révolutionner la caractérisation des matériaux\, l’étude des mécanismes de déformation et de rupture\, ainsi que l’identification des comportements constitutifs à l’échelle locale.\n\nCette présentation détaillera les résultats de plusieurs études qui offrent de nouvelles perspectives sur la déformation des matériaux polymères et la plasticité cristalline des matériaux métalliques. Différentes modalités de caractérisation ont été combinées\, telles que la diffraction et la tomographie pour les polymères\, ainsi que l’EBSD\, la tomographie à contraste de diffraction et la topotomographie pour les métaux\, à divers stades de déformation en traction. Ces techniques permettent d’observer directement in situ la formation des structures de déformation. De plus\, la caractérisation 3D facilite la création d’un jumeau numérique de l’expérience\, grâce à des méthodes de simulation mécanique par éléments-finis. Cela ouvre la voie à un nouveau paradigme où expériences et simulations à l’échelle de la microstructure peuvent être utilisées conjointement pour étudier la plasticité et identifier les paramètres des lois matériaux.
URL:https://www.chimieparistech.psl.eu/evenement-agenda/seminaire-programme-gradue-chimie-psl-139/
LOCATION:amphi Charpak\, ESPCI Paris-PSL
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20250403T150000
DTEND;TZID=Europe/Paris:20250403T163000
DTSTAMP:20250331T093710Z
CREATED:20250331T093710Z
LAST-MODIFIED:20250331T093710Z
UID:26983-1743692400-1743697800@www.chimieparistech.psl.eu
SUMMARY:Séminaire Programme Gradué Chimie PSL
DESCRIPTION:Time-domain braiding of anyons By Mélanie Ruelle; Laboratoire de Physique de l’Ecole Normale Supérieure\, ENS\, Paris\, France. Thursday April 3 at 3:00 pm (Paris time)\, Room Charpak\, entrance building\, ground floor at LPEM in hybrid. Contrary to fermions and bosons\, anyons are quasiparticles that keep a robust memory of particle exchanges via a braiding phase factor. This provides them with unique dynamical properties so far unexplored. When an anyon excitation is emitted toward a quantum point contact (QPC) in a fractional quantum Hall (FQH) fluid\, this memory translates into tunneling events that may occur long after the anyon excitation has exited the QPC. For anyons\, the dominant mechanism for particle transfer is not the direct tunneling of the incoming excitations\, but rather a time-domain braiding process between the incoming excitations and particle-hole excitations created at the QPC.In this work\, we investigate the mechanism of anyon braiding at a QPC with two-particle interferometry experiments in the dc and ac regime. We measure topological exchange properties (the braiding phase) and dynamical edge properties (the scaling dimension) of anyons. In the nu = 2/5 state\, we show that an anyon collider device is able to not only distinguish anyons from fermions but also to discriminate between different types of anyons based on their braiding phase. In the nu=1/3 state\, we implement a Hong-Ou-Mandel experiment between triggered anyon pulses to study the dynamics of anyons directly in the time domain. This experiment introduces time-domain measurements for characterizing the braiding phase and scaling dimension of anyons.\n\nZoom link: https://espci.zoom.us/j/82220964875?pwd=sdUgjSI0Bl6UkmhhJDQ1W2NJ56ZTf8.1\nID: 822 2096 4875\nPasscode: KvKlitzing
URL:https://www.chimieparistech.psl.eu/evenement-agenda/seminaire-programme-gradue-chimie-psl-140/
LOCATION:évènement hybride
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20250404T120000
DTEND;TZID=Europe/Paris:20250404T133000
DTSTAMP:20250328T093104Z
CREATED:20250328T092259Z
LAST-MODIFIED:20250328T093104Z
UID:26972-1743768000-1743773400@www.chimieparistech.psl.eu
SUMMARY:Webinaire Grands Programmes de Recherche PSL : programme CHEMAI
DESCRIPTION:L’université PSL lance une série de webinaires en ligne consacrés aux Grands Programmes de Recherche  qui ouvriront un espace de réflexion sur les enjeux qui traversent la recherche actuelle. \nLe premier webinaire aura comme thématique : « La recherche responsable en questions ». Ce premier rendez-vous sera introduit par E.M. Mouhoud\, président de l’Université Paris\, Sciences & Lettres (PSL) & Anne Christophe\, vice-présidente Recherche\, Sciences & Société de l’Université Paris\, Sciences & Lettres (PSL) et réunira : \n\nStéphanie Monjon\, professeur d’économie Dauphine – PSL\, membre du copil du programme TERRAE (Transition Environnementale par la Recherche\, la Recherche-Action et l’Enseignement)\nThijs Stuyver\, chercheur en chimie numérique Chimie ParisTech – PSL\, co-porteur du programme CHEMAI (Chemistry Informed Models : Artificial intelligence for chemistry)\nMatthieu Labousse\, professeur de physique à l’ESPCI Paris – PSL\, co-porteur du programme META-SOFT MATTER\n\nIl sera suivi d’un temps de questions/réponses avec les participantes et participants. \nInscriptions ici
URL:https://www.chimieparistech.psl.eu/evenement-agenda/webinaire-grands-programmes-de-recherche-psl-programme-chemai/
LOCATION:Visioconférence
CATEGORIES:Conférence
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20250405T080000
DTEND;TZID=Europe/Paris:20250621T170000
DTSTAMP:20250331T093809Z
CREATED:20241003T170619Z
LAST-MODIFIED:20250331T093809Z
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/
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20250407T113000
DTEND;TZID=Europe/Paris:20250407T133000
DTSTAMP:20250404T084554Z
CREATED:20250404T084554Z
LAST-MODIFIED:20250404T084554Z
UID:27007-1744025400-1744032600@www.chimieparistech.psl.eu
SUMMARY:Séminaire Programme Gradué Chimie PSL
DESCRIPTION:Dew formation on soft substrate\, Ambre Bouillant (Laboratoire MSC\, UMR CNRS 7057\, Université Paris Cité)\, Bruno Andreotti (LPENS\, Paris PSL) and Jacco H. Snoeijer (Twente University\, Enschede\, NL). This seminar will take place at the seminar room of Gulliver C1.62  at 11:30.\n \nWhen moist air encounters a cold surface\, it condenses into a collection of droplets\, forming what are commonly known as « breath figures ». Dew formation has been extensively studied on a variety of surfaces\, including rough\, chemically heterogeneous\, patterned\, polymeric\, liquid-infused and pure liquid substrates. Despite the sensitivity to the substrate nature\, common features for condensation include the primary and usually continued nucleation of nanodroplets\, their diffusive growth and their coalescence to a more advanced\nstage. The collected droplets typically evolve towards scale-free polydisperse size distributions\, ranging from freshly nucleated nanodroplets to millimetre sizes (resulting from continued nucleation and coalesce events). Remarkably\, on atomically smooth liquid substrates\, dew droplets exhibit a 2D crystalline order with high\nmonodispersity and a well-defined density.\n(a) Schematic of the controlled humidity chamber. (b) Breath figures imaged from above using a microscope\,\non substrates of increasing elastic modulus G for a relative humidity ρ/ρsat = 1.22 ± 0.11\, and Ts = 5˚C.\nIn this seminar\, I will discuss the condensation dynamics on soft\, smooth\, crosslinked polymer gels. We conduct condensation experiments in a chamber with controlled humidity [Fig. (a)] onto PDMS gels\, whose elastic modulus is varied between 10 and 106 Pa\, on uncross-linked PDMS liquid as well as on stiff PDMS brushes. Although elasticity should be marginal at the nanometric scale at which drops form\, we report that the nuclei density is highly sensitive to the substrate softness\, which suggests that nucleation follows a low- energy pathway sensitive to the degree of cross-linking. A central question is how the water vapor flux allocates between the generation of new droplets and the enlargement of existing ones. Once droplets enter the visible range (R ~ 1 μm)\, the number of droplets remains constant (until they start to touch and coalesce). The absence of additional nucleation events and therefore the droplet density selection is explained by the formation of a saturated boundary layer at the substrate vicinity. This not only affects the growth of droplets but also dramatically elevates the energy barrier to nucleate new droplets. Hence\, monodispersity of the breath figures on soft PDMS gels persists for long. Later\, when neighboring drops get closer\, they attract each other due to the so-called Cheerios interactions\nmediated by substrate deformations. Drops then gather into clusters that exhibit a reluctance to coalesce. The delay in coarsening is found to be an decreasing function of the substrate elastic modulus. This ultimately results in the formation of a persistent bidimensional quasi-crystal of droplets\, that coarsens according to a universal law akin to Oswald ripening.\nBreath figures offer a macroscopic approach to probe the molecular characteristics of the polymer interface\, challenge the elastocapillarity theory at small scales and raise the question of multiple Cheerios interactions between a large set of drops?
URL:https://www.chimieparistech.psl.eu/evenement-agenda/seminaire-programme-gradue-chimie-psl-141/
LOCATION:ESPCI Paris\, 10 Rue Vauquelin\, Paris\, 75005\, France
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20250408T110000
DTEND;TZID=Europe/Paris:20250408T130000
DTSTAMP:20250320T152426Z
CREATED:20250320T152020Z
LAST-MODIFIED:20250320T152426Z
UID:26921-1744110000-1744117200@www.chimieparistech.psl.eu
SUMMARY:Séminaire Programme Gradué Chimie PSL
DESCRIPTION:Please note a common SIMM/Gulliver seminar of Prof. Satish Kumar from the University of Minnesota on Tuesday the 8th of April (unusual slot) at 11am in Charpak room. \nSatish Kumar Department of Chemical Engineering and Materials Science\, University of MinnesotaDroplet dynamics near topographical features. While solid substrates are often idealized as being perfectly smooth\, all real  surfaces possess some level of topographical and chemical heterogeneity. This heterogeneity  can greatly influence droplet dynamics\, and is of tremendous relevance for  applications ranging from oil recovery to water harvesting to advanced manufacturing.  In this talk\, we will show how mathematical models based on lubrication theory  that account for surface topography provide insight into how  topographical features induce pinning of the three-phase contact line where the liquid\, air\, and solid all meet.  Sufficiently strong external forces cause contact-line depinning\, and in some cases the depinning force can be understood through relatively simple scaling relationships.  Three examples will be presented involving (i) shear-induced depinning\, (ii) gravity-induced depinning\, and (iii) evaporation-induced depinning.  Comparisons to existing experimental observations will be discussed.
URL:https://www.chimieparistech.psl.eu/evenement-agenda/seminaire-programme-gradue-chimie-psl-136/
LOCATION:ESPCI Paris\, 10 Rue Vauquelin\, Paris\, 75005\, France
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20250415T103000
DTEND;TZID=Europe/Paris:20250415T120000
DTSTAMP:20250408T120449Z
CREATED:20250408T120449Z
LAST-MODIFIED:20250408T120449Z
UID:27024-1744713000-1744718400@www.chimieparistech.psl.eu
SUMMARY:Séminaire Programme Gradué Chimie PSL
DESCRIPTION:Prof. Krzysztof Matyjaszewski from Carnegie Mellon University on Tuesday\, April 15th.Kris will be giving a lecture entitled « Nanostructured Functional Materials by Atom Transfer Radical Polymerization » at 10h30 in the Holweck Amphitheater.For those of us who do not know Kris\, his group has made remarkable contributions to the field of macromolecular engineering\, pushing the boundaries of the field\, most notably through the discovery and development of Atom Transfer Radical Polymerization (ATRP). 
URL:https://www.chimieparistech.psl.eu/evenement-agenda/seminaire-programme-gradue-chimie-psl-142/
LOCATION:ESPCI Paris\, 10 Rue Vauquelin\, Paris\, 75005\, France
CATEGORIES:Séminaire
END:VEVENT
BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20250417T140000
DTEND;TZID=Europe/Paris:20250417T160000
DTSTAMP:20250416T163343Z
CREATED:20250416T163343Z
LAST-MODIFIED:20250416T163343Z
UID:27071-1744898400-1744905600@www.chimieparistech.psl.eu
SUMMARY:Séminaire Programme Gradué Chimie PSL
DESCRIPTION:By Laure Mercier de Lépinay\nDepartment of Applied Physics\, Aalto University\, FI-00076 Aalto\, Finland\n \nOptomechanical drum resonators have allowed many breakthroughs in microwave optomechanics\, such as the implementation of active cooling down to the ground state [1]\, squeezed states [2] and entangled states [3] of center-of-mass displacement. Here\, we show that drum resonators made of closely spaced metallic membranes used in many quantum optomechanical experiments are in fact expected to be impacted to a drastic extent by the Casimir potential\, applying a stress comparable in order of magnitude to the stress incurred due to relative thermal contractions when cooling the device to cryogenic temperatures. \n\ny using a two-tone optomechanical scheme to drive such an oscillator coupled to a microwave on-chip cavity\, we observe a strongly nonlinear mechanical behavior which we find\, by matching it with continuation simulations\, to be compatible in magnitude and distance-scaling with the expected Casimir force. We exclude several other sources of nonlinearity as origins of the observed behavior to argue that it is indeed very likely due to the Casimir effect. We also present our work on potential patches in these devices [4]\, as these may have the same qualitative effect as the Casimir force\, and propose qualitative and quantitative arguments to exclude other sources of non-linearity. \nFinally\, we show that the high sensitivity of these superconducting drum resonators to the Casimir force would allow to investigate the difference between the normal-state and superconducting-state Casimir force. The measurement of this difference has indeed been proposed to shed light on a long-standing discrepancy between theoretical and experimental values of the Casimir force [5].\n \n[1] J. D. Teufel et al.\, Nature 475\, 359–363 (2011)\n[2] F. Lecocq\, J. B. Clark\, R. W. Simmonds\, J. Aumentado\, and J. D. Teufel\, Physical Review X 5\, 41037 (2015)\, J. M. Pirkkalainen\, E. Damskägg\, M. Brandt\, F. Massel\, and M. A. Sillanpää\, Physical Review Letters 115\, 243601 (2015)\, E. E. Wollman et al.\, Science 349\, 952-955 (2015) \n[3] C. F. Ockeloen-Korppi et al.\, Nature 556\, 478 – 482 (2018)\n[4] M. H. J. de Jong\, and L. Mercier de Lépinay\, arXiv:2408.16323 (submitted)\n[5] G. Bimonte\, Physical Review A 78\, 62101 (2008)\n \n \nZoom link: https://espci.zoom.us/j/81648739414?pwd=nTqanStxIp2wc01dgmUgBv6uGPsHwU.1\nID: 816 4873 9414\nPasscode: H.Casimir
URL:https://www.chimieparistech.psl.eu/evenement-agenda/seminaire-programme-gradue-chimie-psl-143/
LOCATION:évènement hybride
END:VEVENT
END:VCALENDAR