Atomic-scale ‘lasagna’ keeps heat at bay

Researchers from Tokyo Metropolitan University have found new ways of controlling how heat flows through thin materials by stacking atomically thin layers of atoms into van der Waals heterostructures. By comparing different stacks of different materials, or even the same material after heat treatment, they found that weak coupling and mismatch between layers helped significantly reduce heat transport. Their finding promises sensitive control of heat flow at the nanoscale in thermoelectric devices.

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