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Meanwhile, the field of topological photonics has emerged, presenting new, and largely unexploited, functionalities for self\u2010assembled colloidal materials. The robustness of topological photonic properties to defects that are practically unavoidable in self\u2010assembled colloidal structures appears to be especially attractive. Here, the self\u2010assembly of a colloidal honeycomb crystal is demonstrated in computer simulations, with an assembly strategy that not only suppresses the formation of real\u2010space topological defects observed in experiments but also results in topological photonic properties in reciprocal space. This assembly strategy promotes the emergence of long\u2010range order and allows for the breaking of spatial inversion symmetry with two distinct sub\u2010lattices. A sufficient dielectric contrast between the colloidal particles sitting on these two sub\u2010lattices is exploited to realize a valley\u2010Hall topological photonic phase, allowing for unidirectional propagation of circularly polarized light through waveguides composed of the designer crystals. The design rules are tested for their robustness to open the door to scalable fabrication of topological photonic devices via colloidal\u00a0self\u2010assembly.<\/jats:p>","DOI":"10.1002\/smll.75515","type":"journal-article","created":{"date-parts":[[2026,10,4]],"date-time":"2026-10-04T13:55:41Z","timestamp":1791122141000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Self\u2010Assembly of a Colloidal Honeycomb Crystal in Silico for Topological Valley Photonics"],"prefix":"10.1002","author":[{"given":"Adam","family":"Walker","sequence":"first","affiliation":[{"name":"EPSRC Centre for Doctoral Training in Topological Design University of Birmingham Birmingham United Kingdom"},{"name":"School of Chemistry University of Birmingham Birmingham United Kingdom"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Andreas","family":"Neophytou","sequence":"additional","affiliation":[{"name":"School of Chemistry University of Birmingham Birmingham United Kingdom"},{"name":"Dipartimento di Fisica Sapienza Universit\u00e0 di Roma Roma Italy"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Piet J. M.","family":"Swinkels","sequence":"additional","affiliation":[{"name":"School of Physics and Astronomy University of Birmingham Birmingham UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7240-597X","authenticated-orcid":false,"given":"Angela","family":"Demetriadou","sequence":"additional","affiliation":[{"name":"Institute of Physics University of Amsterdam Amsterdam The Netherlands"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peter","family":"Schall","sequence":"additional","affiliation":[{"name":"School of Physics and Astronomy University of Birmingham Birmingham UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-2939-2808","authenticated-orcid":false,"given":"Dwaipayan","family":"Chakrabarti","sequence":"additional","affiliation":[{"name":"School of Chemistry University of Birmingham Birmingham United Kingdom"},{"name":"International Institute for Sustainability with Knotted Chiral Meta Matter (WPI\u2010SKCM<sup>2<\/sup>) Hiroshima University Hiroshima Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,10,4]]},"reference":[{"key":"e_1_2_10_2_1","doi-asserted-by":"crossref","first-page":"5898","DOI":"10.1039\/D0CS00706D","article-title":"From Colloidal Particles to Photonic Crystals: Advances in Self\u2010Assembly and Their Emerging Applications","volume":"50","author":"Cai Z.","year":"2021","journal-title":"Chemical Society Reviews"},{"key":"e_1_2_10_3_1","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1038\/s41467-021-22809-6","article-title":"The Diversity of Three\u2010Dimensional Photonic Crystals","volume":"12","author":"Cersonsky R. 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