Heat transport through nanoscale gaps—A perspective
Résumé
This perspective describes the key physical concepts at play capturing transport regimes in gaps with sizes ranging from the micron down to theÅngström. The roles of photons, phonons and electrons are highlighted and illustrated across several examples from the literature. Particularly, two situations for which atomistic calculations provide insights in the microscopic mechanisms at play in thermal transport across nanoscale gaps will be expounded, namely thermal transport across silica clusters and in 2D materials. While experimental investigations are highly challenging and a vast field of opportunities still remains open in this matter, several related domains of application such as Thermophotovoltaics, Thermoionics, Thermal management, Imaging and 2D materials are involved. *
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