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Nanoparticle assembly and disassembly in complex media - Florent Carn

Laboratoire Matière & Systèmes Complexes - Université de Paris


During this presentation I will talk about our work on 2 topics on the general theme of assembly, and disassembly, of nanoparticles in complex media. The first part will focus on the assembly of nanoparticles by electrostatic complexation with long polyelectrolyte chains of opposite charges. I will discuss more specifically the influence of the ratio between the persistence length of the polyelectrolyte and the radius of the nanoparticles on the structure of the assemblies formed in different regions of the state diagrams. The second part will concern the fate of gold nanoparticles internalized in fibroblast cells. I will show that these particles, which are supposed to be weakly reactive, can be degraded according to a size-dependent kinetic and that the ions resulting from the degradation are recrystallized in the form of a 2D assembly of bio-persistent nanocrystals.

Agenda

séminaire

  • Vendredi 22 janvier 11:00-12:00 - Florent Carn - Université de Paris

    Nanoparticle assembly and disassembly in complex media - Florent Carn

    Résumé : During this presentation I will talk about our work on 2 topics on the general theme of assembly, and disassembly, of nanoparticles in complex media. The first part will focus on the assembly of nanoparticles by electrostatic complexation with long polyelectrolyte chains of opposite charges. I will discuss more specifically the influence of the ratio between the persistence length of the polyelectrolyte and the radius of the nanoparticles on the structure of the assemblies formed in different regions of the state diagrams. The second part will concern the fate of gold nanoparticles internalized in fibroblast cells. I will show that these particles, which are supposed to be weakly reactive, can be degraded according to a size-dependent kinetic and that the ions resulting from the degradation are recrystallized in the form of a 2D assembly of bio-persistent nanocrystals.


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