C2N, among the French laboratories, contributing to the study of the interstellar visitor 3I/ATLAS with the MAJIS instrument

In November 2025, the ESA JUICE mission pointed five of its scientific instruments at the interstellar comet 3I/ATLAS, shedding new light on this rare visitor from another stellar system. The French instrument detected infrared emissions from water vapor and CO₂, as well as light scattering by the coma in the visible/near-infrared range of comet 3I/ATLAS. France contributes to the mission through the involvement of several French laboratories, …

Extreme longitudinal thermal conductivity and non-diffusive heat transport in isotopic hBN

Researchers from C2N and collaborators at Neel lab., MPQ lab, L2C lab. and Kansas university report record thermal transport properties in isotopically purified hexagonal boron nitride (hBN), a two-dimensional insulating material of major interest for thermal dissipation and thermal anisotropy. By combining microfabricated suspended devices with Raman thermometry (Fig a and b), the team demonstrates an in-plane thermal conductivity exceeding 1650 W·m⁻¹·K⁻¹ at room temperature, among the highest values …