{
  "annotation_id": "fc92f1d4-f7fa-4e41-82e7-37ba26c82d2d",
  "date_created": "2026-02-17T05:53:08.812000Z",
  "date_modified": "2026-02-17T05:53:08.812000Z",
  "file_hash": "08b1e59ab5af43d8d34ee35eb4ba343ea3cc86452a1418a4da5eec7fd7c24ac2",
  "private": false,
  "record": {
    "abstract": "Magnetite ferrite (Fe3O4) nanoparticles have attracted considerable interest due to their tunable physico-chemical properties and relevance in functional materials. In this work, uncoated Fe3O4 nanoparticles and surface-modified Fe3O4 nanoparticles coated with polyethylene glycol (PEG-6000) and citric acid (CA) were synthesized via a chemical co-precipitation method. The effect of surface functionalization on the structural, spectroscopic, magnetic, and colloidal properties of the nanoparticles was systematically investigated. X-ray diffraction analysis confirmed the formation of phase-pure Fe3O4 with an inverse spinel structure for all the samples. Fourier transform infrared and Raman spectroscopy verified successful surface modification while preserving the Fe-O framework of the magnetite core. Dynamic light scattering and zeta potential measurements indicated improved dispersion and colloidal stability for the surface-modified nanoparticles. Magnetization studies performed at room temperature revealed superparamagnetic behaviour for all samples, accompanied by a coating-dependent reduction in saturation magnetization. Overall, the results emphasize the critical role of surface chemistry in tailoring the physicochemical, magnetic, and colloidal behaviour of Fe3O4 nanoparticles. Keywords: Fe3O4 nanoparticles, PEG, Citric acid, Co-precipitation, Surface functionalization, Zeta potential, Colloidal stability, Magnetic properties",
    "arxiv_id": "2601.06585",
    "authors": [
      "Arif Iqbal Sheikh",
      "Radha Srinivasan"
    ],
    "categories": [
      "cond-mat.mtrl-sci"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "title": "Influence of Surface Functionalization on the Colloidal Stability and Magnetic Properties of Ferrite Nanoparticles",
    "url": "https://arxiv.org/abs/2601.06585",
    "version": "v1"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "6954133a-1917-4103-9044-63ba70c2139b",
    "id": "arXiv Dataset",
    "type": "Model",
    "variant": "snapshot-2026-01-17",
    "version": "0.1.0"
  },
  "user_id": 1000002
}