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8 January 2020

Improved optical slicing by Stimulated Emission Depletion light sheet microscopy.

Optical microscopy, which uses fluorescent markers, is essential for imaging biological samples. Often, excitation and detection are done via a single objective, we speak of epifluorescence technique. As part of the "Nanoscolas" project supported by the ANR, in collaboration with a team from the Grenoble Institute of Neuroscience (GIN), we have shown that a superesolutiv method could reconcile finesse and uniformity.

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7 January 2020

Structural defects to renew microtubules

Fluorescence microscopy analysis of the renewal dynamics of the molecules that make up the microtubules revealed that nanoscopic defects in the wall of the microtubule are at the origin of the incorporation of new tubulin molecules. These structural defects can lead to original properties and thus offer a new lever for regulating their stability.

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18 December 2019

Faceted bubbles, or how to stabilize bubbles with 3D printing

Air bubbles in water are excellent acoustic resonators, good candidates for the manufacturing acoustic metamaterials, but have the disadvantage of being difficult to keep in place, in addition to dissolving quickly. Grenoble physicists have shown that it is possible to create "faceted bubbles" attached to 3D printed substrates to solve the issues of conventional spherical bubbles, while preserving their acoustic properties.

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13 December 2019

Elastic avalanches in amorphous solids

When a sufficiently large stress is applied to amorphous solids (e.g. glasses, foams), these solids deform plastically, i.e. undergo flow at a finite strain rate. In this work, we study the much less characterized situation of a solid which is deformed at very small strains, with a macroscopic behavior that appears to be perfectly elastic and reversible.

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10 December 2019

Deterministic chaos reproduces the randomness of living microswimmers

Several microorganisms (bacteria, algae...) explore the surrounding space in search of nutrients by following a linear walk for a period of time (called a "run") followed by a sudden change in direction (called a "tumble") and so on. This type of trajectory is known as a "run-and-tumble". The theoretical work carried out at the Liphy shows that artificial swimmers (phoretic particles) can autonomously perform the same type of run and tumble movement as living microorganisms by evoking relatively simple but robust physical mechanisms only.

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To be noted

Ecole Thématique Mécabio

10-15 may 2020 @ Les Houches

Active Complex Matter 2020

1-11 sept. 2020 @ Cargese (Corsica)

PhD defenses

this automn @ LIPhy

Invited talks

to come @ LIPhy