Thermal Resistance of Graphene Based Device

2020

Author : Roisul Hasan Galib
Release : 2020
Genre :
Kind : eBook
Book Rating : /5 ( reviews)

Book Synopsis Thermal Resistance of Graphene Based Device by : Roisul Hasan Galib

Download or read book Thermal Resistance of Graphene Based Device written by Roisul Hasan Galib. This book was released on 2020. Available in PDF, EPUB and Kindle. Book excerpt: Thermal transport in low dimensional materials play a critical role in the functionality and reliability of modern electronics. In 2D material based device, interface between 2D materials and substrates often limit the heat flow through the device. This thesis discusses the experimental measurements and theoretical modeling of thermal resistances at 2D material based device. First, we measure thermal conductivity and thermal resistance of bulk substrate by three-omega method. Next, we model the interfacial thermal resistance between the 2D material and substrates with the aid of phonon mismatch modelling. Finally, we quantify the total thermal resistance of a graphene based device by series resistance model. Our analysis shows majority of the resistance comes from the interfaces, and material's intrinsic resistance becomes less significant at nanoscale. We find that the thermal resistance at the interface of graphene and substrate contributes to more than 50% of the total resistance. We attribute this high resistance at interface to weak Van der Waals interactions at the interface and dissimilar phonon vibrational properties of the materials. Our results suggest that increasing bond strength at the interface is an effective way to reduce the overall thermal resistance of the device. We compare our results with commonly used materials and interfaces, demonstrating the role of interface as potential application for heat guide or block in 2D material based device. This study will provide guide into the energy-efficient design and thermal management of 2D material devices.

Electronic and Thermal Properties of Graphene

2020-07 Science

Author : Kyong Yop Rhee
Release : 2020-07
Genre : Science
Kind : eBook
Book Rating : 008/5 ( reviews)

GET EBOOK

Book Synopsis Electronic and Thermal Properties of Graphene by : Kyong Yop Rhee

Download or read book Electronic and Thermal Properties of Graphene written by Kyong Yop Rhee. This book was released on 2020-07. Available in PDF, EPUB and Kindle. Book excerpt: This Special Issue includes recent research articles and extensive reviews on graphene-based next-generation electronics, bringing together perspectives from different branches of science and engineering. The papers presented in this volume cover experimental, computational and theoretical aspects of the electrical and thermal properties of graphene and its applications in batteries, electrodes, sensors and ferromagnetism. In addition, this Special Issue covers many important state-of-the-art technologies and methodologies regarding the synthesis, fabrication, characterization and applications of graphene-based nanocomposites.

Polymer Nanocomposites

2016-05-06 Technology & Engineering

Author : Xingyi Huang
Release : 2016-05-06
Genre : Technology & Engineering
Kind : eBook
Book Rating : 387/5 ( reviews)

GET EBOOK

Book Synopsis Polymer Nanocomposites by : Xingyi Huang

Download or read book Polymer Nanocomposites written by Xingyi Huang. This book was released on 2016-05-06. Available in PDF, EPUB and Kindle. Book excerpt: This book focuses on the fundamental principles and recent progress in the field of electrical and thermal properties of polymer nanocomposites. The physical and chemical natures determining the electrical and thermal properties of polymer nanocomposites are discussed in detail. The authors describe the range of traditional and emerging polymer nanocomposites from nanoparticle and polymer composites to novel nanostructure based polymer nanocomposites. They include novel properties and potential applications, such as high-k, low-k, high thermal conductivity, antistatic, high voltage insulation, electric stress control, and thermal energy conversion among others.

Experimental and Theoretical Investigations of Thermal Transport in Graphene

2015

Author : Mir Mohammad Sadeghi
Release : 2015
Genre :
Kind : eBook
Book Rating : /5 ( reviews)

GET EBOOK

Book Synopsis Experimental and Theoretical Investigations of Thermal Transport in Graphene by : Mir Mohammad Sadeghi

Download or read book Experimental and Theoretical Investigations of Thermal Transport in Graphene written by Mir Mohammad Sadeghi. This book was released on 2015. Available in PDF, EPUB and Kindle. Book excerpt: Graphene has been actively investigated because its unique structural, electronic, and thermal properties are desirable for a number of technological applications ranging from electronic to energy devices. The thermal transport properties of graphene can influence the device performances. Because of the high surface to volume ratio and confinement of phonons and electrons, the thermal transport properties of graphene can differ considerably from those in graphite. Developing a better understanding of thermal transport in graphene is necessary for rational design of graphene-based functional devices and materials. It is known that the thermal conductivity of single-layer graphene is considerably suppressed when it is in contact with an amorphous material compared to when it is suspended. However, the effects of substrate interaction in phonon transport in both single and multi-layer graphene still remains elusive. This work presents sensitive in-plane thermal transport measurements of few-layer and multi-layer graphene samples on amorphous silicon dioxide with the use of suspended micro-thermometer devices. It is shown that full recovery to the thermal conductivity of graphite has yet to occur even after the thickness of the supported multi-layer graphene sample is increased to 34 layers, which is considerably thicker than previously thought. This surprising finding is explained by the long intrinsic scattering mean free paths of phonons in graphite along both the basal-plane and cross-plane directions, as well as partially diffuse scattering of phonons by the graphene-amorphous support interface, which is treated by an interface scattering model developed for highly anisotropic materials. In addition, an experimental method is introduced to investigate electronic thermal transport in graphene and other layered materials through the measurement of longitudinal and transverse thermal and electrical conductivities and Seebeck coefficient under applied electric and magnetic fields. Moreover, this work includes an investigation of quantitative scanning thermal microscopy measurements of electrically biased graphene supported on a flexible polyimide substrate. Based on a triple scan technique and another zero heat flux measurement method, the temperature rise in flexible devices is found to be higher by more than one order of magnitude, and shows much more significant lateral heat spreading than graphene devices fabricated on silicon.

Graphene

2017-09-01

Author : Hongwei Zhu
Release : 2017-09-01
Genre :
Kind : eBook
Book Rating : 516/5 ( reviews)

GET EBOOK

Book Synopsis Graphene by : Hongwei Zhu

Download or read book Graphene written by Hongwei Zhu. This book was released on 2017-09-01. Available in PDF, EPUB and Kindle. Book excerpt: Graphene: Fabrication, Characterizations, Properties and Applications presents a comprehensive review of the current status of graphene, especially focused on synthesis, fundamental properties and future applications, aiming to giving a comprehensive reference for scientists, researchers and graduate students from various sectors. Graphene, a single atomic layer of carbon hexagons, has stimulated a lot of research interest owing to its unique structure and fascinating properties. The book is devoted to understanding graphene fundamentally yet comprehensively through a wide range of issues in the areas of materials science, chemistry, physics, electronics and biology. The book is an important resource of comprehensive knowledge pertinent to graphene and to related expanding areas. This valuable book will attract scientists, researchers and graduate students in physics and chemistry because it aims at providing all common knowledge of these communities including essential aspects of material synthesis and characterization, fundamental physical properties and detailed chapters focused on the most promising applications. Presents a comprehensive and up-to-date review of current research of graphene, especially focused on synthesis, fundamental properties and future applications Includes not only fundamental knowledge of graphene materials, but also an overview of special properties for different potential applications of graphene in the fields of solar cells, photodetectors, energy storage, composites, environmental materials and bio-materials Emphasizes graphene-based applications that are quickly emerging as potential building blocks for nanotechnological commercial applications

Popular eBooks

Thermal Resistance of Graphene Based Device

Electronic and Thermal Properties of Graphene

Polymer Nanocomposites

Experimental and Theoretical Investigations of Thermal Transport in Graphene

Graphene

You may also like...