title: Marked thermal exaltation in hybrid thin membranous nanomaterials covered by stretched nanodots for thermoelectrics and passive cooling.
abstract: An anisotropic thin membranous nanomaterial is modeled at the molecular scale to obtain a hybrid thermal behavior with applications from thermoelectrics to passive heat sinking. These antagonist phenomena, with different heat carriers, are obtained in two orthogonal in-plane directions, respectively x and y, when the thin membrane is covered by stretched nanodots forming elongated islands parallel to y. The phonon thermal conductivity is minimal in the direction x but maximal in that y. In nanomaterials composed of Si and Ge for the membrane and islands, respectively, thermal-conductivity exaltation as high as 22 folds is computed between the two phonon regimes in this theoretical study.
authors.affiliation: University of Lille 1, Department of Physics, Cité scientifique, 59655 Villeneuve d'Ascq cedex, France. jngillet@gmail.com
authors.forename: Jean-Numa
authors.initials: JN
authors.lastname: Gillet
mesh_terms: D003080:Cold Temperature; D003198:Computer Simulation; D055119:Elastic Modulus; D004735:Energy Transfer; D008567:Membranes, Artificial; D008956:Models, Chemical; D008958:Models, Molecular; D049329:Nanostructures / Q000737:chemistry* / Q000648:ultrastructure*; D013696:Temperature
chemical_list: D008567:Membranes, Artificial