Journal article
Enhanced Thermal Boundary Conductance in Few-Layer Ti 3 C 2 MXene with Encapsulation
Advanced materials (Weinheim), v 30(43), pe1801629
Oct 2018
PMID: 30252179
Abstract
Van der Waals interactions in 2D materials have enabled the realization of nanoelectronics with high-density vertical integration. Yet, poor energy transport through such 2D-2D and 2D-3D interfaces can limit a device's performance due to overheating. One long-standing question in the field is how different encapsulating layers (e.g., contact metals or gate oxides) contribute to the thermal transport at the interface of 2D materials with their 3D substrates. Here, a novel self-heating/self-sensing electrical thermometry platform is developed based on atomically thin, metallic Ti
C
MXene sheets, which enables experimental investigation of the thermal transport at a Ti
C
/SiO
interface, with and without an aluminum oxide (AlO
) encapsulating layer. It is found that at room temperature, the thermal boundary conductance (TBC) increases from 10.8 to 19.5 MW m
K
upon AlO
encapsulation. Boltzmann transport modeling reveals that the TBC can be understood as a series combination of an external resistance between the MXene and the substrate, due to the coupling of low-frequency flexural acoustic (ZA) phonons to substrate modes, and an internal resistance between ZA and in-plane phonon modes. It is revealed that internal resistance is a bottle-neck to heat removal and that encapsulation speeds up the heat transfer into low-frequency ZA modes and reduces their depopulation, thus increasing the effective TBC.
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Details
- Title
- Enhanced Thermal Boundary Conductance in Few-Layer Ti 3 C 2 MXene with Encapsulation
- Creators
- Poya Yasaei - University of Illinois at ChicagoZahra Hemmat - University of Illinois at ChicagoCameron J Foss - University of Massachusetts AmherstShixuan Justin Li - Drexel UniversityLiang Hong - University of Illinois at ChicagoAmirhossein Behranginia - University of Illinois at ChicagoLeily Majidi - University of Illinois at ChicagoRobert F Klie - University of Illinois at ChicagoMichel W Barsoum - Drexel UniversityZlatan Aksamija - University of Massachusetts AmherstAmin Salehi-Khojin - University of Illinois at Chicago
- Publication Details
- Advanced materials (Weinheim), v 30(43), pe1801629
- Publisher
- Wiley
- Grant note
- 1542864 / National Science Foundation EFRI 2-DARE NNCI-1542205 / National Science Foundation EFRI 2-DARE DMR-0959470 / National Science Foundation EFRI 2-DARE DMR-1626065 / National Science Foundation EFRI 2-DARE
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000448786000008
- Scopus ID
- 2-s2.0-85052917798
- Other Identifier
- 991019168030704721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Chemistry, Multidisciplinary
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied
- Physics, Condensed Matter