Thermal properties of Xenes measured by optothermal Raman spectroscopy.

After the outcomes on graphene, Xenes like phosphorene, silicene, and stanene layers, as well as their epitaxial heterostructures, intro-duced novel advancements in two-dimensional (2D) materials science and nano-technology.[1] With all these materials being promising for application to electronics and optoelectronics, an issue remains as to how heat diffusion is managed when they are sub-jected to thermal dissipation of heat. The problem is also related to the dissipation from Xenes towards the substrate or to metal con-tacts. Here, using an optothermal method based on Raman spectroscopy as non-destructive probe, we explore the effective thermal con-ductivity of phosphorene and silicene on dif-ferent substrates.[2-3] The so-proposed ap-proach discloses a viable route for the as-sessment of the thermal properties of silicene and other supported 2D materials. The man-agement of power dissipation at the nanoscale could eventually be exploited in fields like thermoelectrics. We believe that our work provides a new perspective on an unresolved nanoscale issue such as the thermal response of classes of 2D materials, enabling signifi-cant advances in the field of the heat man-agement. [MUR-Prin Photo] 1. D. S. Dhungana, C. Grazianetti, C. Martel-la, S. Achilli, G. Fratesi, and A. Molle, Adv. Funct. Mat. 31 (30), 2102797, 2021 2. E. Bonera and A. Molle, Nanomaterials 2022, 12, 1410. 3. E. Bonaventura, D. S. Dhungana,a C. Martella, C. Grazianetti, S. Macis, S. Lu-pi, E. Bonera, and A. Molle, Nanoscale Horiz., 2022, 7, 924.