We study heat transport in bulk/nanoporous/bulk silicon devices; we show that, despite bulk/nanoporous devices may act as thermal rectifiers, the non-linear aspects of their joint thermal conductance are not strong enough to lead to a negative differential thermal resistance, necessary to allow bulk/nanoporous/bulk Si devices to act as thermal transistors. Furthermore, we explicitly study the effective thermal conductivity of the mentioned devices for several temperatures, geometries, porosities, and pore size. © 2012 Elsevier B.V.
|Journal||Physics Letters, Section A: General, Atomic and Solid State Physics|
|Publication status||Published - 4 Feb 2013|
- Heat rectification
- Phonon hydrodynamics
- Porous Si