{
  "abstract": "Grain boundaries (GBs) are ubiquitous defects in crystalline materials, but remain less explored in block copolymer ordered phases. Here, we develop a self-consistent field theory framework to investigate GB structure and energetics in double-gyroid (DG) diblock copolymer networks. Two energy landscapes are obtained for tilt and twist GBs as functions of GB orientations revealing multiple local minima. The lowest-energy GB among the sampled GBs is an asymmetric-tilt network-switching GB ($[\\bar{1}\\bar{1}1]$ ATNS) rather than the experimentally observed $(422)$ twin boundary (TB) among the sampled GBs. Comparative analyses of tilt ($[\\bar{1}\\bar{1}1]$, $[100]$ ATNS) and twist ($(422)$ TB, $[0\\bar{1}\\bar{1}]$ TNS) GBs reveal that, unlike enthalpy-dominated hard matter, GB stability in DG networks is entropy-driven. Twist-type GBs generate new nodes and disrupt nodal coplanarity, causing chain-packing frustration and entropy penalties. Although the [100] ATNS does not generate new nodes, its disruption of nodal coplanarity still incurs large entropy penalties. Conversely, the $[\\bar{1}\\bar{1}1]$ ATNS preserves favorable network connectivity and minimizes conformational constraints, making it the energetically preferred GB.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2605.26927",
  "author_total": 5,
  "authors": [
    {
      "name": "Jing Chen"
    },
    {
      "name": "Aiping Zhu"
    },
    {
      "name": "Dan Wei"
    },
    {
      "name": "An-Chang Shi"
    },
    {
      "name": "Kai Jiang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/d1zx2bg82yjn8.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2605.26927",
  "fulltext_url": null,
  "id": "d1zx2bg82yjn8",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2605.26927",
  "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.soft"
    ],
    [
      "openalex",
      "2505|Block Copolymer Self-Assembly"
    ]
  ],
  "openalex": "W7162522691",
  "pdf_url": "https://arxiv.org/pdf/2605.26927",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-28",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/d1zx2bg82yjn8.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:36:22Z",
      "native_id": "2605.26927",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.26927"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.soft",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Structure and energetics of grain boundaries in self-assembled double-gyroid block copolymer networks",
  "title_text": "Structure and energetics of grain boundaries in self-assembled double-gyroid block copolymer networks",
  "type": "preprint",
  "updated_at": "2026-11-01T12:20:44Z",
  "url": "https://research.draconitic.com/paper/d1zx2bg82yjn8",
  "venue": "arXiv",
  "versions": []
}