{
  "abstract": "High-resolution nanopatterning of self-assembled colloidal nanocrystal superlattices is crucial for their integration into miniaturized devices and integrated photonics. However, conventional top-down lithography often compromises supercrystallinity and dissolves constituent nanocrystals. Here, we introduce a non-destructive, bottom-up approach for the site-specific nucleation and growth of perovskite superlattices. Guided by the Lifshitz theory of van der Waals forces, we engineer a sharp permittivity contrast within nanotemplates to manipulate localized dewetting dynamics. This tailored interaction landscape establishes deep thermodynamic sinks that selectively drive the site-specific nucleation of CsPbBr3 nanocrystals. Corroborated by molecular dynamics simulations, we reveal that these dynamic energy sinks strictly restrict the rotational degrees of freedom of incoming nanocrystals, ultimately promoting highly ordered, face-to-face superlattice packing. This approach yields uniform, large-area arrays with subwavelength feature sizes and periodicities down to 200 and 350 nanometers, respectively, achieving an unprecedented array density exceeding 8 x 106 mm-2. Deterministic control over superlattice dimensions and array periodicity enables precise momentum-space engineering of radiation patterns, realizing highly directional light-emitting metasurfaces with an ultranarrow beam divergence of only 8.5°. Finally, we demonstrate the monolithic integration of these arrays into subwavelength electrically-driven active light-emitting metasurfaces, unlocking robust on-chip light modulation. This work establishes a robust pathway for translating the extraordinary properties of perovskite superlattices into next-generation on-chip nanophotonics.",
  "abstract_shown": true,
  "affiliations": [
    "Institute for Chemical and Bioengineering",
    "ETH Zürich",
    "Department of Chemical Engineering",
    "Indian Institute of Science",
    "Laboratory for Nanometallurgy",
    "School of Integrated Circuits",
    "Huazhong University of Science and Technology"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 11,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "Donato Maria Carretta"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Zhan-Hong Lin"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Gianluca Vagli"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Sunil B. Shivarudraiah"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Jiwoo Oh"
    },
    {
      "affs": [
        2,
        3
      ],
      "name": "Abhijit Gogoi"
    },
    {
      "affs": [
        4,
        1
      ],
      "name": "Marcello Pozzi"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Tommaso Marcato"
    },
    {
      "affs": [
        0,
        1,
        5,
        6
      ],
      "name": "Shuangshuang Zeng"
    },
    {
      "affs": [
        2,
        3
      ],
      "name": "Ananth Govind Rajan"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Chih-Jen Shih"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/03ypbaqkx1q48.bib",
  "cited_by": 0,
  "doi": "10.26434/chemrxiv.15008892/v1",
  "fulltext_url": null,
  "id": "03ypbaqkx1q48",
  "issns": [],
  "landing_url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15008892/v1",
  "language": null,
  "licence": "CC-BY-NC-ND",
  "licence_label": "CC BY-NC-ND",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2208|Perovskite Materials and Applications"
    ]
  ],
  "openalex": "W7213273332",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-15",
  "publisher": "American Chemical Society (ACS)",
  "ris": "https://research.draconitic.com/paper/03ypbaqkx1q48.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:17:19Z",
      "native_id": "10.26434/chemrxiv.15008892",
      "source": "chemrxiv",
      "url": "https://chemrxiv.org/doi/full/10.26434/chemrxiv.15008892/v1"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "source:chemrxiv",
      "subfield": "general"
    }
  ],
  "title": "van der Waals-Guided Nanopatterning Perovskite Nanocrystal Superlattices for Active Light-Emitting Metasurfaces",
  "title_text": "van der Waals-Guided Nanopatterning Perovskite Nanocrystal Superlattices for Active Light-Emitting Metasurfaces",
  "type": "preprint",
  "updated_at": "2026-10-30T12:17:19Z",
  "url": "https://research.draconitic.com/paper/03ypbaqkx1q48",
  "venue": "ChemRxiv",
  "versions": []
}