{
  "abstract": "We demonstrate efficient electron doping of exfoliated MoS$_2$ through the deposition of N-heterocyclic carbene (NHC) molecules onto its surface. Raman spectroscopy reveals a pronounced softening of the optical A$_{1g}$ phonon mode after NHC deposition, consistent with electron transfer from the NHC molecules to the MoS$_2$ layers. The largest phonon-energy shifts are observed in monolayer and bilayer flakes whereas changes in bulk-like MoS$_2$ are negligible, indicating that the doping efficiency depends on the number of layers. This thickness dependence highlights the dominant role of interfacial charge transfer at the NHC/MoS$_2$ interface. Quantitative analysis of the Raman modes of as-exfoliated and NHC-covered MoS$_2$, together with comparison with literature values, allows us to estimate an increase in the two-dimensional electron density of about two-orders of magnitude in MoS$_2$ mono- and bilayers. These results demonstrate that NHC-based surface deposition is a promising approach for chemically tuning the carrier density of semiconducting transition-metal dichalcogenides and provide a potential route toward molecularly tunable two-dimensional electronic devices, in which, analogous to modulation doping, the donors reside outside the semiconductor lattice.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.24769",
  "author_total": 7,
  "authors": [
    {
      "name": "Ana Senkić"
    },
    {
      "name": "Arne Nalop"
    },
    {
      "name": "Xenia Sieverding"
    },
    {
      "name": "Ariane Ufer"
    },
    {
      "name": "Sebastian Roling"
    },
    {
      "name": "Frank Glorius"
    },
    {
      "name": "Ursula Wurstbauer"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/f6ma3rzgn951t.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.24769",
  "fulltext_url": null,
  "id": "f6ma3rzgn951t",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.24769",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.mtrl-sci"
    ],
    [
      "openalex",
      "2505|2D Materials and Applications"
    ]
  ],
  "openalex": "W7223002744",
  "pdf_url": "https://arxiv.org/pdf/2610.24769",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-17",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/f6ma3rzgn951t.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:30:52Z",
      "native_id": "2610.24769",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.24769"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.mtrl-sci",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Molecular Doping of MoS$_2$ with N-Heterocyclic Carbenes: A Raman Study of Interfacial Charge Transfer",
  "title_text": "Molecular Doping of MoS_2 with N-Heterocyclic Carbenes: A Raman Study of Interfacial Charge Transfer",
  "type": "preprint",
  "updated_at": "2026-10-30T12:33:41Z",
  "url": "https://research.draconitic.com/paper/f6ma3rzgn951t",
  "venue": "arXiv",
  "versions": []
}