Pushing the boundaries of the thermal conductivity of materials

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Outline • Thermal conductivity and interface thermal conductance. • Advances in time-domain thermoreflectance. • Amorphous limit to the thermal conductivity of materials. • Ultralow thermal conductivity: beating the amorphous limit in nanolaminates and disordered layered crystals.
Interfaces are critical at the nanoscale • Low thermal conductivity in nanostructured materials – improved thermoelectric energy conversion – improved thermal barriers • High thermal conductivity composites and suspensions 50 nm
Page 1: Pushing the boundaries of the therm
Page 5 and 6: Thermal conductivity and interface
Page 7 and 8: Brief introduction to thermoelectri
Page 9 and 10: Carbon nanotubes • Evidence for t
Page 11 and 12: Critical aspect ratio of a fiber co
Page 13 and 14: psec acoustics and time-domain ther
Page 15 and 16: Windows software author: Catalin Ch
Page 17 and 18: Thermal conductivity map of a human
Page 19 and 20: Critical aspect ratio of a fiber co
Page 21 and 22: Can we beat the amorphous limit of
Page 23 and 24: Works well for homogeneous disorder
Page 25 and 26: W/Al 2 O 3 nanolaminates • ultra-
Page 27 and 28: Cross-sectional TEM of 60 nm thick
Page 29 and 30: Ion irradiation of WSe 2 MD simulat
Page 31 and 32: Molecular dynamics simulation • M
Page 33 and 34: Back to experiment: Can we lower th
Page 35: Conclusions • Difficult to take a

Pushing the boundaries of the thermal conductivity of materials

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