Scaling behavior of the thermal conductivity of width-modulated nanowires and nanofilms for heat transfer control at the nanoscale

Xanthippi Zianni (1, 2) , Valentin Jean (3) , Konstantinos Termentzidis (3) , David Lacroix (3)

1 TEI - Technological Educational Institution of Sterea Ellada
2 NCSR - National Center for Scientific Research "Demokritos"
3 LEMTA - Laboratoire d'Energétique et Mécanique Théorique et Appliquée

We report on scaling behavior of the thermal conductivity of width-modulated nanowires and nanofilms that have been studied with the phonon Monte Carlo technique. It has been found that the reduction of the thermal conductivity scales with the nanostructure transmissivity, a property entirely determined by the modulation geometry, irrespectively of the material choice. Tuning of the thermal conductivity is possible by the nanostructure width-modulation without strict limitations for the modulation profile.

Domaines: Sciences de l'ingénieur [physics]

Xanthippi Zianni, Valentin Jean, Konstantinos Termentzidis, David Lacroix. Scaling behavior of the thermal conductivity of width-modulated nanowires and nanofilms for heat transfer control at the nanoscale. Nanotechnology, 2014, 25 (46), pp.465402. ⟨10.1088/0957-4484/25/46/465402⟩. ⟨hal-01425607⟩