Journal ArticleDOI
Dense Vertically Aligned Multiwalled Carbon Nanotube Arrays as Thermal Interface Materials
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TLDR
In this article, a phase sensitive transient thermo-reflectance technique was used to measure the thermal conductance of the two interfaces on each side of a vertically aligned carbon nanotube array as well as the CNT array itself.Abstract:
Carbon nanotube (CNT) arrays are being considered as thermal interface materials (TIMs). Using a phase sensitive transient thermo-reflectance technique, we measure the thermal conductance of the two interfaces on each side of a vertically aligned CNT array as well as the CNT array itself. We show that the physically bonded interface by van der Waals adhesion has a conductance ~105W/m2K and is the dominant resistance. We also demonstrate that by bonding the free-end CNT tips to a target surface with the help of a thin layer of indium weld, the conductance can be increased to ~106W/m2K making it attractive as a TIMread more
Citations
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Proceedings ArticleDOI
Nanostructured polymer-metal composite for thermal interface material applications
TL;DR: In this article, a novel nanostructured polymer-metal composite for thermal interface material applications is introduced, which provides all-metal high thermal conductivity pathways between surfaces, with total thermal resistances as low as 8.5 Kmm2 W-1 at bondline thicknesses of approximately 70 mum.
Journal ArticleDOI
Heat Capacity, Thermal Conductivity, and Interface Resistance Extraction for Single-Walled Carbon Nanotube Films Using Frequency-Domain Thermoreflectance
Abstract: Thermal interface materials (TIMs) based on vertically aligned carbon nanotube (VACNT) films promise the unusual combination of high thermal conductance and low elastic modulus, properties that are critical for TIM performance and reliability This paper reports through-plane thermal conductivity, heat capacity, and boundary resistances measured using frequency domain thermoreflectance for seven VACNT films The films are composed of single-walled carbon nanotubes grown using chemical vapor deposition on Si substrates and have thicknesses from 53 to 81 μm The top surfaces of the films are coated with 100-nm Ti and 100-nm Ag as a transducer layer for the thermoreflectance measurement The roughness of the top surface of each sample is measured using atomic force microscopy The average thermal conductivity of the films ranges from 21 to 35 W m-1 K-1 and the average heat capacity ranges from 55 to 93 J cm-3 K-1 The heat capacity of the films is used to calculate the volume fraction of tubes that contributes to thermal conduction The CNT-metal boundary resistances are below 1 m2 K MW-1 and the CNT-substrate resistance ranges from 3 to 80 m2 K MW-1 Variations of the nanotube alignment and morphology throughout the film are also examined using scanning electron micrographs to provide a comprehensive analysis of these films
Journal ArticleDOI
Reactive Metal Bonding of Carbon Nanotube Arrays for Thermal Interface Applications
TL;DR: In this article, the authors examined the use of a reactive metal bonding layer to attach and transfer CNT arrays to metal-coated substrates, and the thermal performance was compared with CNT array bonded with indium solder.
Journal ArticleDOI
An atomistic study of thermal conductance across a metal-graphene nanoribbon interface
TL;DR: In this article, an atomistic Green's function study of phonon transport through a heterogeneous interface between bulk TiC substrates and graphene nanoribbons (GNRs) is presented.
Journal ArticleDOI
Light-weight nanocomposite materials with enhanced thermal transport properties
TL;DR: In this paper, the signifi cant recent results on thermally conductive polymeric nanocomposites with graphene sheets are highlighted, and their potential applications and issues on their further performance improvements are discussed.
References
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David G. Cahill,Wayne K. Ford,Kenneth E. Goodson,Gerald D. Mahan,Arun Majumdar,Humphrey J. Maris,Roberto Merlin,Simon R. Phillpot +7 more
TL;DR: A review of the literature on thermal transport in nanoscale devices can be found in this article, where the authors highlight the recent developments in experiment, theory and computation that have occurred in the past ten years and summarizes the present status of the field.
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Anomalous thermal conductivity enhancement in nanotube suspensions
TL;DR: In this paper, the authors have produced nanotube-in-oil suspensions and measured their effective thermal conductivity, which is anomalously greater than theoretical predictions and is nonlinear with nanotubes loadings.
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