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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260315T000000
DTEND;TZID=Europe/Paris:20260320T235959
DTSTAMP:20260515T105724
CREATED:20260124T041542Z
LAST-MODIFIED:20260124T041542Z
UID:10000033-1773532800-1774051199@sfp-alpes.fr
SUMMARY:Grenoble Neurotech School 2026
DESCRIPTION:Plus d’informations : https://neurotech2026.sciencesconf.org/?lang=en \n  \nContact : salma.mezzi@univ-grenoble-alpes.fr
URL:https://sfp-alpes.fr/event/grenoble-neurotech-school-2026/
LOCATION:Centre Paul Langevin\, Aussois\, France
CATEGORIES:Workshop
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BEGIN:VEVENT
DTSTART;TZID=Europe/Paris:20260319T140000
DTEND;TZID=Europe/Paris:20260319T150000
DTSTAMP:20260515T105724
CREATED:20260227T145207Z
LAST-MODIFIED:20260227T145253Z
UID:10000086-1773928800-1773932400@sfp-alpes.fr
SUMMARY:Rebeca RIBEIRO (C2N\, Paris-Saclay)
DESCRIPTION:Twist-Angle-Controlled Anomalous Gating in Bilayer Graphene/BN Heterostructures\nRésumé : \nAnomalous gating effects—such as gate ineffectiveness and pronounced hysteresis—have been observed in graphene-based systems encapsulated in boron nitride (BN) and linked to a possible ferroelectric state. However\, their origin\, stability\, and reproducibility remain under debate. During this talk\, I will present charge transport experiments in dual-gated\, dynamically rotatable van der Waals heterostructures based on bilayer graphene encapsulated in BN. Remarkably\, the angular degree of freedom acts as an ON/OFF switch for the anomalous gating response. We show that the angular alignment between the two BN layers is the key parameter governing these effects. Both gate ineffectiveness and hysteresis are highly sensitive to small angular changes\, and they clearly change in behavior\, which we classify into three distinct regimes. \nContact : florence.levy-bertrand@neel.cnrs.fr
URL:https://sfp-alpes.fr/event/rebeca-ribeiro-c2n-paris-saclay/
LOCATION:CNRS – Salle Rémy Lemaire (K223)\, CNRS - Institut Néel 25 avenue des Martyrs\, Grenoble\, 38042\, France
CATEGORIES:Séminaire
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DTSTART;TZID=Europe/Paris:20260319T140000
DTEND;TZID=Europe/Paris:20260319T150000
DTSTAMP:20260515T105724
CREATED:20260305T151014Z
LAST-MODIFIED:20260305T151747Z
UID:10000094-1773928800-1773932400@sfp-alpes.fr
SUMMARY:Matthieu RAYNAL (Sorbonne Université\, CNRS\, Institut Parisien de Chimie Moléculaire (IPCM))
DESCRIPTION:Supramolecular helical catalysts : chirality induction and beyond\nRésumé : \nHelices are commonly formed by symmetry breaking operating during the bottom-up assembly of small molecules or monomers and their sense of rotation can be controlled by various methods. Important progress has been made in controlling the chiral and structural properties of supramolecular discrete assemblies and polymers.[1] Benzene-1\,3\,5- tricarboxamide[2] (BTA) are ubiquitous synthons for the preparation of hydrogen-bonded helices but it remains to be demonstrated how a given macroscopic property\, notably related to chirality (e.g. chiroptical\, magnetic\, catalytic)\, can be affected by tuning the structure of these supramolecular polymers or copolymers. We demonstrated that the supramolecular chirality of BTA assemblies can be transferred to intrinsically achiral metal centres (Rh\, Cu) located at their periphery.[3] How the selectivity of a catalytic reaction of reference can be affected by the nature of the monomers\, the presence of metal centres\, and the addition of achiral additives will be particularly discussed.[4] Not only a fine tuning of the chirality of the supramolecular assemblies but also a proper control of their dynamicity is key to address important challenges. We recently disclose the possibility to select one major (70%-79%) amongst four possible stereoisomers of an amino alcohol by applying the supramolecular helical catalyst in either concomitant (with no inversion of catalyst handedness) or sequential (with inversion of catalyst handedness) hydrosilylation and hydroamination reactions [5]. \nReferences : \n[1] Yashima E. et al. Chem. Rev.\, 2016\, 116\, 13752.\n[2] Cantekin S. et al. Chem. Soc. Rev.\, 2012\, 41\, 6125.\n[3] Desmarchelier A. et al. J. Am. Chem. Soc.\, 2016\, 138\, 4908.\n[4] (a) Li Y. et al. J. Am. Chem Soc.\, 2020\, 142\, 5676. (b) Martínez-Aguirre M. A. et al. Angew. Chem. Int. Ed.\, 2021\, 60\, 4183. (c) Hammoud A. et al. Chem. Eur. J.\, 2023\, e202300189. (d) Kong H. et al. ChemistryEurope\, 2023\, 1\, e202300027.\n[5] Chen\, R. et al. Nature Commun.\, 2024\, 15\, 4116 \n_ \nContact : adrien.quintard@univ-grenoble-alpes.fr
URL:https://sfp-alpes.fr/event/matthieu-raynal-sorbonne-universite-cnrs-institut-parisien-de-chimie-moleculaire-ipcm/
LOCATION:DCM – Salle C209\, DCM - Bât Chimie Recherche 301 rue de la Chimie\, St Martin d'Hères\, 38400\, France
CATEGORIES:Séminaire
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