About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
|
Grain Boundaries, Interfaces, and Surfaces: Fundamental Structure-Property-Performance Relationships
|
Presentation Title |
E-9: Viscoelastic Bandgap and Thermal Transport in Inorganic-organic Nanolaminates |
Author(s) |
Rajan Khadka, Pawel Keblinski |
On-Site Speaker (Planned) |
Rajan Khadka |
Abstract Scope |
In this work, using molecular dynamics (MD) simulations we characterize the viscoelastic response and thermal conductivity of Au-Molecular Nanolayer (MNL). In particular, oscillatory shear simulations deformation of nanolaminate reveal a high-damping-loss frequency band in the 77≤ υ ≤278 GHz. Our analysis indicates that this damping gap has an interfacial origin, can be manipulated by the strength of the interfacial bonding, and cannot be explained by weighted averages of bulk responses. We also found that the thermal conductivity of these organic-inorganic nanolaminates is controlled by the interfacial bonding strength. However, the effective interfacial thermal conductance in the nanolaminates with a ~ 2.4 nm “superlattice” period is about ~ 2.3 higher, regardless of the bonding strength, than the interfacial conductance of an isolated Au/MNL. junction. |