Thermal resistance mapping along a single cup-stacked carbon nanotube with focused electron beam heating

Li, Dawei; Li, Qin-Yi; Takahashi, Kazuhiko

doi:10.1016/j.ijheatmasstransfer.2022.123418

Cited by 5 publications

(1 citation statement)

References 53 publications

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“…1b, this total thermal resistance includes the thermal resistance of the two 1D sample segments in the heat path, denoted as R 1D-1 and R 1D-2 , respectively, and the TCR between the two 1D samples, denoted as R c , as well as the negligible TCR, R cp and R cs , at the well-bonded junctions between the 1D samples and the probe or the nanofilm sensor [29][30][31][32][33] . After the thermal measurements for all the contact morphologies, we separate the two 1D samples and measure the thermal conductivity of each sample using the same T-type method [29][30][31][32][33] , as illustrated in Fig. 1c, and thus obtain the thermal resistance of each sample segment, R 1D-1 and R 1D-2 , in the TCR measurement.…”

Section: Articlementioning

confidence: 99%

Mastering thermal transport across carbon nanotube contacts through morphological control

Li,

Takahashi,

2024

Commun Mater

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Thermally conductive nanomaterials hold great promise for applications in thermal management. However, the interfaces between nanomaterials can significantly impede heat flow, and a comprehensive understanding of thermal transport across nanoscale contacts is highly desired. Here, by integrating a movable nano-manipulator within an electron microscope with a nanofabricated thermal sensor, we adjusted the contact positions, overlapping length, and crossing angles between two carbon nanotubes (CNTs) as desired, while concurrently measuring the thermal contact resistance (TCR) at the van der Waals junction. The TCR far surpassed that of the studied 6 μm-long CNTs, particularly in contacts affected by inevitable nanoscale surface contamination. The TCR per unit area exhibited significant variations across different contact morphologies, spanning two orders of magnitude even for identical pairs of samples, attributable to structural non-uniformity within the CNTs. This in-situ approach and the notable morphology effects can guide the control of heat at the nanoscale.

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