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- W4298047288 abstract "Acoustic phonon transport is revealed as a potential radiation-to-conduction transition mechanism for single-digit nanometer vacuum gaps. To show this, we measure heat transfer from a feedback-controlled platinum nanoheater to a laterally oscillating silicon tip as the tip-nanoheater vacuum gap distance is precisely controlled from a single-digit nanometer down to bulk contact in a high-vacuum shear force microscope. The measured thermal conductance shows a gap dependence of $d^{-5.7pm1.1}$ in the near-contact regime, which is in good agreement with acoustic phonon transport modeling based on the atomistic Green's function framework. The obtained experimental and theoretical results suggest that acoustic phonon transport across a nanoscale vacuum gap can be the dominant heat transfer mechanism in the near- and asperity-contact regimes and can potentially be controlled by an external force stimuli." @default.
- W4298047288 created "2022-10-01" @default.
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- W4298047288 date "2019-04-19" @default.
- W4298047288 modified "2023-10-17" @default.
- W4298047288 title "Role of Acoustic Phonon Transport in Near- to Asperity-Contact Heat Transfer" @default.
- W4298047288 doi "https://doi.org/10.48550/arxiv.1904.09383" @default.
- W4298047288 hasPublicationYear "2019" @default.
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