Lieu

LPS, amphi moyen
Orsay

Date

23 Juin 2023
Expired!

Heure

11h00 - 12h00

Aggregation of dipolar chains – René Messina

LPCT  – UMR CNRS 7019

Self-assembly of dipolar particles assisted by external magnetic/electric field is relevant in the development of a wide range of applications. The inherent chain formation leads to outstanding magnetic properties that can be beneficial to drug delivery, 

microfluidic systems, electrophotographic devices,  data recording , etc.

In this talk, I will address the aggregation of dipolar chains driven by thermal fluctuations in an external strong magnetic field. A newly discovered  simple electrostatic mechanism is exposed. The resulting curvature-mediated quadrupolar coupling rationalizes the counter-intuitive lateral coalescence of dipolar chains. Our Monte Carlo simulations results corroborate this mechanism. These findings shed new light on a longstanding problem in soft matter and related areas.