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Here, we report a porcupine\u2010spine\u2010inspired photo\u2010responsive dynamic offensive bio\u2010interface that dismantles mature biofilms through electrically actuated mechanical penetration and light\u2010driven oxidative stress. A high\u2010aspect\u2010ratio nano\u2010dagger array undergoes reversible nanoscale deformation (\u223c110\u00a0nm) under an alternating electric field, while a photo\u2010responsive heterostructure generates a surface photovoltage (\u223c364\u00a0mV) that enhances reactive oxygen species production. Mechanical penetration continuously disrupts the biofilm\u2013surface interface, exposing bacteria within the EPS matrix to oxidative attack. This synergistic mechanism enables nearly complete biofilm eradication under complete immersion in bacterial suspensions of 10\n                    <jats:sup>9<\/jats:sup>\n                    CFU mL\n                    <jats:sup>\u22121<\/jats:sup>\n                    , outperforming representative state\u2010of\u2010the\u2010art systems while maintaining stable antibiofilm activity for at least 10 days without chemical biocides. This work establishes a dynamic offensive strategy for durable self\u2010cleaning and antifouling interfaces.\n                  <\/jats:p>","DOI":"10.1002\/advs.78251","type":"journal-article","created":{"date-parts":[[2026,10,13]],"date-time":"2026-10-13T04:32:52Z","timestamp":1791865972000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Porcupine\u2010Quill\u2010Inspired Shape\u2010Morphing Biointerfaces Disassemble Biofilms"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0009-0009-7400-8797","authenticated-orcid":false,"given":"Feng","family":"Qian","sequence":"first","affiliation":[{"name":"Institute of Marine Science and Technology Shandong University  Qingdao Shandong China"},{"name":"Shandong Key Laboratory of Intelligent Marine Engineering Geology Environment and Equipment Institute of Marine Science and Technology Shandong University  Qingdao Shandong 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Technology Shandong University  Qingdao Shandong China"},{"name":"Shandong Key Laboratory of Intelligent Marine Engineering Geology Environment and Equipment Institute of Marine Science and Technology Shandong University  Qingdao Shandong China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jinke","family":"Yin","sequence":"additional","affiliation":[{"name":"Institute of Marine Science and Technology Shandong University  Qingdao Shandong China"},{"name":"Shandong Key Laboratory of Intelligent Marine Engineering Geology Environment and Equipment Institute of Marine Science and Technology Shandong University  Qingdao Shandong China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mengyu","family":"Fu","sequence":"additional","affiliation":[{"name":"Institute of Marine Science and Technology Shandong University  Qingdao Shandong China"},{"name":"Shandong Key Laboratory of Intelligent Marine Engineering Geology Environment and Equipment Institute of Marine Science and Technology Shandong University  Qingdao Shandong China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xue","family":"Zhang","sequence":"additional","affiliation":[{"name":"Institute of Marine Science and Technology Shandong University  Qingdao Shandong China"},{"name":"Shandong Key Laboratory of Intelligent Marine Engineering Geology Environment and Equipment Institute of Marine Science and Technology Shandong University  Qingdao Shandong China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0905-2547","authenticated-orcid":false,"given":"Xiao\u2010Lei","family":"Shi","sequence":"additional","affiliation":[{"name":"ARC Research Hub in Zero\u2010emission Power Generation for Carbon Neutrality Centre for Materials Science and School of Chemistry and Physics Queensland University of Technology  Brisbane Queensland 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