Mapping Hot Spots at Heterogeneities of Few-Layer Ti3 C2 MXene Sheets

ACS Nano
Poya YasaeiVinayak P Dravid

Abstract

Structural defects and heterogeneities play an enormous role in the formation of localized hot spots in 2D materials used in a wide range of applications from electronics to energy systems. In this report, we employ scanning thermal microscopy (SThM) to spatially map the temperature rise across various defects and heterogeneities of titanium carbide (Ti3C2T x; T stands for surface terminations) MXene nanostructures under high electrical bias with sub-50 mK temperature resolution and sub-100 nm spatial resolution. We investigated several Ti3C2T x flakes having different thicknesses as well as heterogeneous MXene structures incorporating line defects or vertical heterojunctions. High-resolution temperature rise maps allow us to identify localized hot spots and to quantify the nonuniformity of the temperature fields across various morphological features. The results show that the local heating is most severe in vertical junctions of MXene flakes and is highly affected by nonuniform conduction due to the presence of line defects. These results provide a direct insight into the power dissipation of MXene-based devices and the roles of various heterogeneities that are inherent to the material synthesis process. This study provides a ...Continue Reading

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Sep 27, 2018·Advanced Materials·Poya YasaeiAmin Salehi-Khojin

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Citations

Feb 6, 2021·Materials·Kemryn Allen-PerryDaniel E Autrey
May 24, 2019·ACS Nano·Tae Hyun ParkCheolmin Park
Oct 29, 2020·The Journal of Physical Chemistry Letters·Qi ZhangJiebo Li
Sep 24, 2021·Journal of Physics. Condensed Matter : an Institute of Physics Journal·Haolin JinXi Chen

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