{
  "annotation_id": "c2b0293c-c50b-490a-8e1e-be3788794130",
  "date_created": "2026-03-02T18:00:50.384000Z",
  "date_modified": "2026-03-02T18:00:50.384000Z",
  "file_hash": "c248b54af56fb60651c9636c9063681300f5ab65c096b3b5f65219c593b2701b",
  "private": false,
  "record": {
    "abstract": "We demonstrate an optical system that can apply and accurately measure the\ntorque exerted by the trapping beam on a rotating birefringent probe particle.\nThis allows the viscosity and surface effects within liquid media to be\nmeasured quantitatively on a micron-size scale using a trapped rotating\nspherical probe particle. We use the system to measure the viscosity inside a\nprototype cellular structure.",
    "arxiv_id": "physics/0402021",
    "authors": [
      "Alexis I. Bishop",
      "Timo A. Nieminen",
      "Norman R. Heckenberg",
      "Halina Rubinsztein-Dunlop"
    ],
    "categories": [
      "physics.optics"
    ],
    "doi": "10.1103/PhysRevLett.92.198104",
    "journal_ref": "Physical Review Letters 92(19), 198104 (2004)",
    "title": "Optical microrheology using rotating laser-trapped particles",
    "url": "https://arxiv.org/abs/physics/0402021"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "071282ab-196c-474b-be0e-4e4a6d4e87cd",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}