Thermal conductivity of graphene

Early in the year 2000, based on molecular dynamics (MD) simulation, the thermal conductivity of suspended single-layer graphene had been predicted to be as high as 6000 W/mK. This value is higher than for any other material. The experimental measurement of thermal conductivity of graphene... 

The thermal conductivity of graphene is dominated by phonons and has been measured to be approximately 5,000 W m... 

The thermal conductivity of suspended graphene has been calculated by measuring the frequency shift of the G-band in the Raman spectrum with varying laser power. These measurements yielded a value for thermal conductivity of 4840 5300 W m 1 K 1 [23], better than that of SWCNTs, with the exception of crystalline ropes of nanotubes, which gave values up to 5800 W m 1 K 1 [24]. Even when deposited on a substrate, the measured thermal conductivity is 600 W m 1 K 1 [25], higher than in commonly used heat dissipation materials such as copper and silver. 

A.A. Balandin, S. Ghosh, W. Bao, I. Calizo, D. Teweldebrhan, F. Miao, et al., Superior thermal conductivity of single-layer graphene, Nano Letters, 8 (2008) 902-907. 

Balandin AA, Ghosh S, Bao W, Calizo I, Teweldebrhan D, Miao F, Lau CN (2008) Superior thermal conductivity of single-layer graphene. Nano Lett 8 902-907... 

Graphene-polymer nanocomposites share with other nanocomposites the characteristic of remarkable improvements in properties and percolation thresholds at very low filler contents. Although the majority of research has focused on polymer nanocomposites based on layered materials of natural origin, such as an MMT type of layered silicate compounds or synthetic clay (layered double hydroxide), the electrical and thermal conductivity of clay minerals are quite poor [177]. To overcome these shortcomings, carbon-based nanofillers, such as CB, carbon nanotubes, carbon nanofibers, and graphite have been introduced to the preparation of polymer nanocomposites. Among these, carbon nanotubes have proven to be very effective as conductive fillers. An important drawback of them as nanofillers is their high production costs, which... 

Lee Y-H, Lee J-H. Scalable growth of free-standing graphene wafers with copper(Cu) catalyst on Si02/Si substrate thermal conductivity of the wafers. Appl Phys Lett 2010 96 0831011-3. 

Li, D., Muller, M., Gilje, S., Richard, B. K., and Gordon G. W., Processable aqueous dispersions of graphene nanosheets . Nature Nanotechnology, 2008, 3, 101-105. Xiang, J. L. and Drzal, L. T., Thermal conductivity of exfohated graphite nanoplatelet paper . Carbon, 2011,49,773-778. 

FIGURE 1.20 Schematic illustration of experimental apparatus for measurement of thermal conductivity of suspended graphene. (With permission from Balandin, A. A. et al, Nano Lett., 8, 902, Copyright 2008. American Chemical Society.)... 

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