Séminaire présenté par Philippe POULIGUEN

Philippe POULIGUEN (Agence Innovation Defense (AID)

L’exposé comportera les présentations :

  • de l’AID
  • du domaine Ondes Acoustiques et Radioélectriques (en focalisant sur la partie radioélectrique)
  • des outils de soutien à la recherche

Séminaire IPCMS présenté par : prof. Ifor D.W. Samuel

Résumé :

Organic semiconductors  are remarkable carbon-based materials that combine novel  semiconducting optoelectronic properties with simple processing.  They can be used to make printed and flexible electronics,  and their properties (e.g.  colour) can be tuned  by changing their chemical structure.  Organic light-emitting diodes (OLEDs) are compact visible light sources that are now found across the world in mobile phone displays and televisions.  This talk will give an introduction to organic semiconductors and optoelectronic devices made from them.

It will then explore two emerging fields of application. The first is photodynamic therapy (PDT).  In PDT light in combination with a light-activated chemical leads to the generation of reactive oxygen species.  OLEDs are very attractive light sources for PDT because they emit over an area, are thin and potentially flexible.   We have shown that PDT with OLEDs can kill skin cancer, parasites and bacteria.   Another emerging application is in visible light communication (or Li-Fi) in which light is modulated to encode information to supplement Wi-Fi.  Finally a new organic optoelectronic device – a laser electrically driven by an OLED will be presented.

Séminaire présenté par : Niels de Jonge

Orateur : Niels de Jonge (Bruker AXS, Karlsruhe, Germany.)

Résumé : Liquid phase electron microscopy (LP-EM) is capable of studying a wide range of sample from materials science, for example, nanoparticles, and biological samples such as proteins and cells in liquid [1]. Different experimental systems are presented, and the physics of image formation is discussed. The obtained spatial resolution is typically limited by ration damage [2], but damage mitigation by at least an order of magnitude is possible [3]. The full scale application of LP-EM for soft matter research still faces several challenges but strategies to to overcome them are emerging, so that time-resolved imaging of processes in soft-matter samples seems within reach [4].  

Employing the unique capabilities of LP-EM, we studied the spatial organization of the membrane protein HER2 in cancer cells. This protein is a member of the epidermal growth factor receptors (EGFRs), and plays an important role in breast cancer aggressiveness and progression. Breast cancer cells were examined by labeling HER2 proteins with quantum dot (QD) nanoparticles for correlative fluorescence microscopy and LP-EM [5]. We discovered a small sub-population of cancer cells with a different response to a prescription drug indicating a possible relevance for studying the role of cancer cell heterogeneity in the development of drug resistance, and studied biopsie samples from patients [6].

LP-EM was also used to directly image dynamic self-assembly behavior of nanoparticles in liquid from which the interplay between nanoparticle shape, ligand shell structure, and substrate–nanoparticle interactions was studied [7].

References:

  • 1.    Nat Nanotechnol 6, 695 (2011).
  • 2.    Nat Rev Mater 4, 61 (2019).
  • 3.    Nano Lett 18, 7435 (2018).
  • 4.    Adv Mater 32, 2001582 (2020).
  • 5.    Sci Adv 1, e1500165 (2015).
  • 6.    Mol Med 25, 42 (2019).
  • 7.    Adv Mater 34, 2109093 (2022).

QMat mini-seminar

We will have the pleasure to listen to:

Ronan VIEL who will give us a presentation on “Iron Complexes for Water Photocatalysis”

ABSTRACT here

Séminaire général IPCMS-CNRS présenté par : M. Kaesmann du ministère de l’intérieur

Résumé : Le séminaire propose une sensibilisation des personnels quel que soit leur positionnement hiérarchique, ainsi que des personnels administratifs exerçant des missions de support à destination des laboratoires de recherche. Elle a pour objectif de permettre une prise de conscience des points de vulnérabilité propres au secteur de la recherche afin de prévenir le risque de compromission par un acteur étranger.

Contact : pierre.rabu@ipcms.unistra.fr, en collaboration avec la Délégation Régionale du CNRS

Workshop SWING

The goal of this workshop is to gather the French community working in the broad field of magnonics (i.e. physics and technologies of spin waves). This workshop will also serve as a scientific kick-off of the project SWING, whose focus is on applied magnonics, and which is part of the recently funded program PEPR Spin.

Please find extra information (schedule, registration submission) at  https://swing-workshop1.sciencesconf.org/