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19 September 2019

Stimulation Emission Depleted Photoacoustic

A chromophore brought in an excited state, when it absorbs light, returns to equilibrium spontaneously by re-emitting light, photons, it is said to fluoresce. But when it is in the condensed phase, its de-excitation can also be done by generating vibrations, phonons, at the origin of a photoacoustic signal. De-excitation can also be stimulated by another light source, it is done to the detriment of the spontaneous emission by depletion of the excited state, it is the phenomenon of Stimulated Emission Depletion (STED ).

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6 September 2019

A single instrument to detect traces of multiple gases

A project using a newly patented LIPhy technology was supported by a "CNRS prematuration program" and is currently in the maturation phase with Satt Linksium.

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6 June 2019

Nanocomposites under tensile strain: anisotropic and heterogeneous dynamics.

At a very low volume fraction (< 1%), nanoparticles do not modify significantly the mechanical or dynamical properties of nanocomposites. It follows that nanoparticles can be used as tracers or probes for revealing the dynamics of strained polymer chains. Researchers of the Laboratory, in collaboration with other scientists of Grenoble and of two foreign Universities, have investigated the dynamics of stretched elastomer chains by means of X-Ray Photon Correlation Spectroscopy (XPCS). The two-time correlation functions determined in the directions parallel and perpendicular to that of the tensile strain, display anisotropic and heterogeneous dynamics.

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21 March 2019

Neurons : The parallel dynamics of multiple ion channels revealed by optical imaging

In neurons, electrical and calcium signals result from the synergistic simultaneous activity of several ion channel types. In the current issue of Journal of Neuroscience, researchers of the LIPhy and their international collaborators report a study where, for the first time, they reconstructed the parallel activity of diverse calcium and potassium channels during a physiological synaptic input in native neurons.

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21 February 2019

A biomimetic experiment to understand the drying of leaves

The resistance of trees to drought is a growing concern in the context of global warming. Under dry conditions, embolisms can appear in the sap network within leaves, potentially stopping the circulation and leading to leaf drying. However, the propagation and growth of embolisms in leaves remains poorly understood. Researchers from LIPhy have undertaken a physical study to study such embolisms in an artificial leaf.

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To be noted

Dysco 2019

18&19 March 2019 @ Deux Alpes

PhD defenses

this automn @ LIPhy

Invited talks

to come @ LIPhy