Phonon Conduction in Silicon Nanobeam Labyrinths.

ABSTRACT: Here we study single-crystalline silicon nanobeams having 470 nm width and 80 nm thickness cross section, where we produce tortuous thermal paths (i.e. labyrinths) by introducing slits to control the impact of the unobstructed "line-of-sight" (LOS) between the heat source and heat sink. The labyrinths range from straight nanobeams with a complete LOS along the entire length to nanobeams in which the LOS ranges from partially to entirely blocked by introducing slits, s = 95, 195, 245, 295 and 395 nm. The measured thermal conductivity of the samples decreases monotonically from ~47 W m^-1 K^-1 for straight beam to ~31 W m^-1 K^-1 for slit width of 395 nm. A model prediction through a combination of the Boltzmann transport equation and ab initio calcula

SUBMITTER: Park W 

PROVIDER: S-EPMC5524879 | biostudies-literature | 2017 Jul

REPOSITORIES: biostudies-literature