Effect of grain boundaries on thermal transport in bi-layer graphene Nano-Ribbons
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.
Primary Faculty Mentor Name
Jihong Ma
Status
Graduate
Student College
College of Engineering and Mathematical Sciences
Program/Major
Materials Science
Primary Research Category
Physical Science
Effect of grain boundaries on thermal transport in bi-layer graphene Nano-Ribbons
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.
