{
  "id": "1603.05286",
  "version": "v1",
  "published": "2016-03-16T21:30:12.000Z",
  "updated": "2016-03-16T21:30:12.000Z",
  "title": "Thermal Conductivity of Suspended Graphene with Defects",
  "authors": [
    "Hoda Malekpour",
    "Pankaj Ramnani",
    "Srilok Srinivasan",
    "Ganesh Balasubramanian",
    "Denis L. Nika",
    "Ashok Mulchandani",
    "Roger Lake",
    "Alexander A. Balandin"
  ],
  "comment": "23 pages, 6 figures",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.mtrl-sci"
  ],
  "abstract": "We investigate the thermal conductivity of suspended graphene as a function of the density of defects, ND, introduced in a controllable way. Graphene layers are synthesized using chemical vapor deposition, transferred onto a transmission electron microscopy grid, and suspended over ~7.5-micrometer size square holes. Defects are induced by irradiation of graphene with the low-energy electron beam (20 keV) and quantified by the Raman D-to-G peak intensity ratio. As the defect density changes from 2.0x10^10 cm-2 to 1.8x10^11 cm-2 the thermal conductivity decreases from ~(1.8+/-0.2)x10^3 W/mK to ~(4.0+/-0.2)x10^2 W/mK near room temperature. At higher defect densities, the thermal conductivity reveals an intriguing saturation behavior at a relatively high value of ~400 W/mK. The thermal conductivity dependence on defect density is analyzed using the Boltzmann transport equation and molecular dynamics simulations. The results are important for understanding phonon - point defect scattering in two-dimensional systems and for practical applications of graphene in thermal management.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-03-16T21:30:12.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "suspended graphene",
      "raman d-to-g peak intensity ratio",
      "transmission electron microscopy grid",
      "higher defect densities",
      "thermal conductivity decreases"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 23,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}