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For strong interfacial adhesion of heterogeneous materials and long\u2010lasting adhesion of flexible protective coatings even in harsh corrosive environments. Inspired by the interdigitated structures in <jats:italic>Phloeodes diabolicus<\/jats:italic> elytra, a straightforward magnetic molding technique is employed to create an interlocking microarray for reinforced heterogeneous assembly. Benefiting from this bio\u2010inspired microarrays, the interlocking polydimethylsiloxane (PDMS) coating recorded a 270% improvement in tensile adhesion and a 520% increase in shear resistance, approaching the tensile limitation of PDMS. The elastic polyurethane\u2010polyamide (PUPI) coating equipped with interlocking structures demonstrated a robust adhesion strength exceeding 10.8\u00a0MPa and is nearly unaffected by the corrosion immersion. In sharp contrast, its unmodified counterpart exhibited low initial adhesion and maintain \u224820% of its adhesion strength after 30 d of immersion. PUPI coating integrated with microarrays exhibits superior resistance to corrosion (30 d, |Z|<jats:sub>0.01HZ<\/jats:sub> \u224810<jats:sup>10\u00a0<\/jats:sup>\u03a9\u00a0cm<jats:sup>2<\/jats:sup>, R<jats:sub>ct<\/jats:sub>\u224810<jats:sup>8<\/jats:sup>\u00a0\u03a9\u00a0cm<jats:sup>2<\/jats:sup>), cavitation and long\u2010term adhesion retention. These interlocking designs can also be adapted to curved surfaces by 3D printing and enhances heterogeneous assembly of non\u2010bonded materials like polyvinylidene fluoride (PTFE) and PDMS. This bio\u2010inspired interlocking structures offers a solution for durably bonding incompatible interfaces across varied engineering applications.<\/jats:p>","DOI":"10.1002\/smll.202312037","type":"journal-article","created":{"date-parts":[[2024,2,27]],"date-time":"2024-02-27T02:25:16Z","timestamp":1709000716000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":29,"title":["Bio\u2010Inspired Interlocking Structures for Enhancing Flexible Coatings Adhesion"],"prefix":"10.1002","volume":"20","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9964-8004","authenticated-orcid":false,"given":"Pengpeng","family":"Lu","sequence":"first","affiliation":[{"name":"Key Laboratory of Bio\u2010inspired Engineering Ministry of Education Jilin University  Changchun 130022 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xin","family":"Li","sequence":"additional","affiliation":[{"name":"College of Chemistry Jilin University  Changchun 130022 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jingyang","family":"Xu","sequence":"additional","affiliation":[{"name":"Key Laboratory of Bio\u2010inspired Engineering Ministry of Education Jilin University  Changchun 130022 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yong","family":"Fan","sequence":"additional","affiliation":[{"name":"College of Chemistry Jilin University  Changchun 130022 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jiyu","family":"Sun","sequence":"additional","affiliation":[{"name":"Key Laboratory of Bio\u2010inspired Engineering Ministry of Education Jilin University  Changchun 130022 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yunhong","family":"Liang","sequence":"additional","affiliation":[{"name":"Key Laboratory of Bio\u2010inspired Engineering Ministry of Education Jilin University  Changchun 130022 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Limei","family":"Tian","sequence":"additional","affiliation":[{"name":"Key Laboratory of Bio\u2010inspired Engineering Ministry of Education Jilin University  Changchun 130022 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Weihua","family":"Ming","sequence":"additional","affiliation":[{"name":"Department of Chemistry and Biochemistry Georgia Southern University  P.O. 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