Reduced Thermal Conductivity in SnSe2 Moire Superlattices

被引：0

作者：

Ran, Yutong ^{[1
]}

Meng, Chen ^{[1
]}

Ma, Yunpeng ^{[1
]}

Li, Qian ^{[1
]}

Zhu, Hongwei ^{[1
]}

机构：

[1] Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

来源：

ACS NANO | 2025年 / 19卷 / 10期

基金：

中国国家自然科学基金;

关键词：

chemical vapor deposition; Moire superlattices; SnSe2; thermalconductivity; temperature-dependentRaman spectroscopy; INTERFACE; PHASE;

D O I：

10.1021/acsnano.5c00295

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Two-dimensional (2D) materials with inherently low thermal conductivity offer significant advantages for thermal management due to constrained phonon transport. The introduction of rotational degrees of freedom in layered 2D materials to form Moire superlattices enables precise modulation of material properties, including electronic band gaps and phonon scattering mechanisms. While simulations have demonstrated that twisted multilayer Moire structures can significantly reduce thermal conductivity through enhanced scattering and localized phonon modes, experimental progress has been limited due to challenges in synthesizing multilayer superlattices. In this study, we report the in situ synthesis of SnSe2 nanosheets with twisted multilayer Moire structures using a scalable chemical vapor deposition method. These superlattices, exhibiting multiple Moire periods, achieve a significant reduction in thermal conductivity compared to regular multilayer structures, driven by enhanced phonon scattering, lattice mismatch, and localized phonon modes. This work establishes multilayer Moire superlattices as a promising and scalable platform for engineering low thermal conductivity 2D materials for advanced energy and electronic applications.

引用

页码：10452 / 10460

页数：9

共 45 条

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