Please use this identifier to cite or link to this item:
https://hdl.handle.net/10356/49888
Title: | Thermal transport in graphene nanostructures | Authors: | Loh, Jarvis Guan Chee. | Keywords: | DRNTU::Engineering::Electrical and electronic engineering::Nanoelectronics | Issue Date: | 2012 | Source: | Loh, J. G. C. (2012). Thermal transport in graphene nanostructures. Doctoral thesis, Nanyang Technological University, Singapore. | Abstract: | Graphene is an extraordinary material. Its electrical and thermal conductivities are among the highest ever measured for any material, with some experiments recording values higher than those of carbon nanotubes. These excellent transport properties make graphene a promising material in nanoelectronic applications. As the device feature sizes are downscaled to accommodate a greater device packing density, the need for an efficient thermal extraction system is increasingly dire. Graphene could be the solution to these problems.However there are many factors that can vitiate its thermal performance. Lattice discontinuities such as material interfaces and structural defects scatter phonons and impede thermal transport through the material. This affects the heat-extraction performance and in turn diminishes the thermal and electrical reliability of the device. In this thesis, thermal transport in graphene and graphene nanostructures is studied using molecular dynamics (MD) simulation. In particular, structural and topological features, such as interfaces, atomic vacancies, adatoms, and tears, are emulated, and their effects on thermal transport are documented. Thermal phenomena in the diamond-graphene and carbon nanotube-graphene nanostructures are examined in detail.A common analytical tool to calculate the interfacial thermal resistance (or thermal boundary resistance) is the diffuse mismatch model. Although it is widely used, large disparities still exist between its predicted results and experimental measurements. Theoretical evaluation and MD simulation demonstrate the critical role of thermal flux in interfacial thermal transport. An improved model, the flux-mediated diffuse mismatch model (FMDMM) is then developed. | URI: | http://hdl.handle.net/10356/49888 | Schools: | School of Electrical and Electronic Engineering | Research Centres: | Microelectronics Centre | Fulltext Permission: | restricted | Fulltext Availability: | With Fulltext |
Appears in Collections: | EEE Theses |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
TeG0702769K.pdf Restricted Access | 1.99 MB | Adobe PDF | View/Open |
Page view(s) 50
454
Updated on Mar 28, 2024
Download(s) 50
22
Updated on Mar 28, 2024
Google ScholarTM
Check
Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.