Pushing the boundaries of the thermal conductivity of materials
Pushing the boundaries of the thermal conductivity of materials
Pushing the boundaries of the thermal conductivity of materials
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Conclusions<br />
• Difficult to take advantage <strong>of</strong> superlative properties <strong>of</strong> carbon<br />
nanotubes because <strong>of</strong> "<strong>the</strong>rmally weak" interfaces.<br />
• Can beat <strong>the</strong> amorphous limit to <strong>the</strong> <strong>the</strong>rmal <strong>conductivity</strong><br />
with high densities <strong>of</strong> interfaces.<br />
• Incredibly low <strong>the</strong>rmal <strong>conductivity</strong> (far below <strong>the</strong> amorphous<br />
limit) in <strong>the</strong> disordered, layered crystal WSe 2.<br />
– Combination <strong>of</strong> disorder (random stacking <strong>of</strong> sheets) and<br />
anisotropy (large differences in vibrations within and<br />
across <strong>the</strong> sheets) appears to be <strong>the</strong> key<br />
– Can we reproduce this physics in <strong>materials</strong> with good<br />
electrical <strong>conductivity</strong> for <strong>the</strong>rmoelectric energy<br />
conversion?<br />
– Can we reproduce this physics in refractory oxides for<br />
<strong>the</strong>rmal barriers?
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