Effect of grain boundaries on thermal transport in bi-layer graphene Nano-Ribbons
Boriwaye, Temitope
Boriwaye, Temitope
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Abstract
Defects and grain boundaries (GBs) in graphene arise frequently during growth, with distinct defect profiles emerging across layers in bilayer graphene. While these GBs are known to reduce thermal transport in monolayers, their influence in multilayer graphene, especially with unique interlayer defect profiles, remains less understood. We employ molecular dynamics simulations to study GBs in a bilayer graphene nanoribbon, revealing a moiré‐like pattern in one layer. Despite a decline in overall in‐plane thermal conductivity, the pristine layer partially compensates for this reduction via van der Waals interactions. Phonon mode analysis clarifies these attenuation mechanisms, informing thermal engineering in graphene heterostructures.
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2025-05-29