{
  "annotation_id": "adf48d95-e292-454b-bfc9-94ee79d3998c",
  "date_created": "2026-03-02T18:00:32.669000Z",
  "date_modified": "2026-03-02T18:00:32.669000Z",
  "file_hash": "8308bc8d9dd7587b60ad59f79729e928e5928cf6015dc41735e38a39372fff37",
  "private": false,
  "record": {
    "abstract": "The energetic characteristics of two-shell carbon nanoparticles (\"onions\")\nwith different shapes of second shell are calculated. The barriers of relative\nrotation of shells are found to be surprisingly small; therefore, free relative\nrotation of shells can take place at room temperature. The intershell\norientational melting of the nanoparticle $C_{60}@C_{240}$ is studied by\nmolecular dynamics. The parameters of Arrhenius formula for jump rotational\nintershell diffusion are calculated. The definition of orientational melting\ntemperature is proposed as the temperature when the transition probability over\nbarrier between equivalent potential minima is equal to 1/2. The temperature of\norientational melting of the nanoparticle $C_{60}@C_{240}$ is about 60 K.",
    "arxiv_id": "physics/0009011",
    "authors": [
      "Yurii E. Lozovik",
      "Andrey M. Popov"
    ],
    "categories": [
      "physics.atm-clus"
    ],
    "doi": "10.1016/S0009-2614(00)00971-4",
    "journal_ref": "Chem. Phys. Lett., 328, 355-362(2000)",
    "title": "Orientational melting of two-shell carbon nanoparticles: molecular   dynamics study",
    "url": "https://arxiv.org/abs/physics/0009011"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e32837a5-2d28-449c-8faa-811a023aae21",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}