{
  "id": "1010.5850",
  "version": "v3",
  "published": "2010-10-28T03:51:16.000Z",
  "updated": "2011-02-07T20:43:36.000Z",
  "title": "Measurement of the Energy Gap of Au55 Nanoparticles Using Far-infrared Transmission Spectroscopy",
  "authors": [
    "Y. H. Kim",
    "Xuandong Zhao",
    "Günter Schmid"
  ],
  "comment": "This paper has been withdrawn by the authors as they made more complete understanding of the issue, making the presented interpretation in the original manuscript erroneous",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We have carried out far-infrared (far-IR) transmission measurements on the ligand stabilized Au55 nanoparticles dispersed in Teflon at volume fractions ranging from 0.2% to 1%. Instead of a series of peaks which might arise from the electron transition between discrete energy levels, we have observed a broad far-IR absorption coefficient that follows with an onset at {\\Delta} ~ 10 cm-1. Furthermore this frequency dependence is totally different from that of the expected absorption due to the induced electric dipole. The onset of the absorption reminiscent of an energy gap at ~ 10 cm-1 (~ 1. 2 meV) is surprisingly smaller than that of the expected for a metal sphere of 5.3 {\\AA} in radius and independent of temperature. In this work we did not observe the level correlation effect on the far-IR absorption predicted for an ensemble of metal nanoparticles. It is concluded that Au55 nanoparticles behave like a three-dimensional (3D) semimetal with an energy gap {\\Delta} ~ 10 cm-1 rather than a giant atom.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2011-02-07T20:43:36.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "energy gap",
      "far-infrared transmission spectroscopy",
      "measurement",
      "stabilized au55 nanoparticles",
      "broad far-ir absorption coefficient"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2010arXiv1010.5850K"
    }
  }
}