Fernanda de Avila Abreu (Microbiology Institute, Federal University of Rio de Janeiro (UFRJ)
Résumé :
Magnetotactic microorganisms are capable of synthesizing membrane-enclosed intracytoplasmic magnetic nanocrystals. The ability to produce these structures is shared among living beings that use the geomagnetic field as a form of guidance in migratory processes. Due to their structural simplicity concerning macroorganisms, magnetotactic bacteria have been widely studied regarding the synthesis of magnetic nanocrystals and magnetic orientation. The nanocrystals produced by magnetotactic bacteria have a narrow size range, consistent shape, chemical purity, crystallographic perfection, and stable properties. Furthermore, the synthesis process is considered entirely sustainable. Therefore, scaling up the production of these magnetic nanoparticles of biological origin, as well as innovative biotechnological approaches, are being studied towards a sustainable future.
Contact : Ovidiu ERSEN, ovidiu.ersen@ipcms.unistra.fr
Orateur : Alexis Wartelle / IJL, Nancy & ESRF, Grenoble
The abstract is available there.
Pour tout contact : arnaud.gloppe@ipcms.unistra.fr
Dr. Civan AVCI
Laboratoire de Chimie de la Matière Condensée de Paris
(UMR 7574 Sorbonne Université, CNRS, Collège de France)
Résumé : Zeolitic imidazolate framework-8 (ZIF-8) is a member of the metal-organic framework (MOF) family that is a new class of material with ultra-high porosity useful for several applications including gas storage, molecular sieving and catalysis. So far, countless studies have been reported, showing applications that are related to the bulk properties of MOFs, and by extension ZIF-8. On the other hand, the controlled manipulation of these molecular crystals at the nano-scale is still embryonic. Here, the presentation will focus on colloidal manipulation of ZIF-8 crystals: their size and shape engineering using top-down and bottom-up approaches at the nano-scale, their self-assembly into superstructures at the meso-scale and their potential applications (such as photonics) at the macro-scale.
à l’Auditorium de l’IPCMS et via Zoom
https://us02web.zoom.us/j/84304431750?pwd=bHJCdVl2NnZyZUFRV1lVaXpGNFAxZz09
