Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Status Confirmed
Seminar Series SEM-LPTMC
Subjects cond-mat.mes-hall
Date Monday 7 October 2019
Time 10:45
Institute LPTMC
Seminar Room campus Jussieu, tower 13-12, 5th floor, room 523
Speaker's Last Name Mohrbach
Speaker's First Name Hervé
Speaker's Email Address herve [dot] mohrbach [at] univ-lorraine [dot] fr
Speaker's Institution LPCT Nancy-Metz
Title Confotronics of biofilaments
Abstract Biofilaments like those of the cytoskeleton show anomalous behaviours in various experiments that can be explained by the existence of conformational excitations. For example, the 2-d confinement of helices forms peculiar squeezed conformations often resembling looped waves, spirals or circles. These shapes as well as the unusual statistical mechanics can be understand in terms of moving and interacting localized conformational quasiparticles. A condensate of these quasiparticles emerges in recent experiments realized on intermediate filaments. As a second example, I will consider tubular lattices like microtubules. Despite significant effort, understanding the unusual mechanics of microtubules remains elusive. There are strong evidences for the existence of conformational internal degrees of freedom in the microtubule lattice that lead to filaments with unique characteristics in the world of macromolecules. I will discuss those characteristics, like the mechanical hysteresis and a peculiar rotational zero mode, which not only explain various experimental results but could also inspire novel smart materials.
arXiv Preprint Number
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Attachments
  • abstract_Mohrbach.pdf (187706 bytes) OPEN

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