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To address these limitations, LMs are commonly processed into liquid metal particles (LMPs), which improve printability. Nevertheless, the insulating oxide shell surrounding each particle persists, typically necessitating additional post\u2010treatment steps to achieve electrical conductivity. Here, we report synergistic mechano\u2010fluidic self\u2010fusion of poly(vinyl alcohol) (PVA)\u2010modified liquid\u2010metal particles (PmLMPs)\u00a0for post\u2010treatment\u2010free soft interconnects. A sprayable PmLMP ink is formulated in which an ultrathin PVA shell stabilizes the particles and enhances substrate adhesion through hydrogen bonding. Direct electrical interconnection is achieved via a two\u2010stage process: spray\u2010induced mechanical impact ruptures the oxide shells to initiate metallic contact, followed by binary\u2010solvent\u2010driven Marangoni convection (deionized (DI) water\/ethanol = 3:1 v\/v) that promotes particle rearrangement and metallic neck growth. This mechano\u2010fluidic sequence enables rapid formation of conductive networks without post\u2010treatment. The printed films exhibit an initial conductivity of 1.5 \u00d7 10\n                    <jats:sup>6<\/jats:sup>\n                    S m\n                    <jats:sup>\u2212<\/jats:sup>\n                    <jats:sup>1<\/jats:sup>\n                    , maintain electrical continuity under monotonic strains exceeding 200% and during approximately 1,400 stretch\u2010release cycles at 100% strain, and support 50\u00a0\u00b5m\u2010scale patterning with large\u2010area scalability. This work establishes a flow\u2010assisted metallic fusion approach for scalable, instantly conductive soft interconnects.\n                  <\/jats:p>","DOI":"10.1002\/advs.78062","type":"journal-article","created":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T05:53:51Z","timestamp":1791352431000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Synergistic Mechano\u2010Fluidic Self\u2010Fusion of Poly(Vinyl Alcohol)\u2010Modified Liquid\u2010Metal Particles for Post\u2010Treatment\u2010Free Soft Electronics"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0009-0002-5557-5605","authenticated-orcid":false,"given":"Keun\u2010Young","family":"Yook","sequence":"first","affiliation":[{"name":"School of Electrical and Electronic Engineering Yonsei University  Seoul Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sangwon","family":"Kim","sequence":"additional","affiliation":[{"name":"School of Electrical and Electronic Engineering Yonsei University  Seoul Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chansoo","family":"Kim","sequence":"additional","affiliation":[{"name":"School of Electrical and Electronic Engineering Yonsei University  Seoul Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Minkyong","family":"Kang","sequence":"additional","affiliation":[{"name":"School of Electrical and Electronic Engineering Yonsei University  Seoul Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yurim","family":"Lee","sequence":"additional","affiliation":[{"name":"School of Electrical and Electronic Engineering Yonsei University  Seoul Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mido","family":"Kim","sequence":"additional","affiliation":[{"name":"School of Electrical and Electronic Engineering Yonsei University  Seoul Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kijun","family":"Park","sequence":"additional","affiliation":[{"name":"Department of Medicine Brigham and Women's Hospital Harvard Medical School  Massachusetts USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8837-4522","authenticated-orcid":false,"given":"Seung Yeop","family":"Han","sequence":"additional","affiliation":[{"name":"Department of Biotechnology Yonsei University  Seoul Republic of Korea"},{"name":"Department of Biomaterials Science and Engineering Yonsei University  Seoul Republic of Korea"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8058-332X","authenticated-orcid":false,"given":"Seung\u2010Woo","family":"Cho","sequence":"additional","affiliation":[{"name":"Department of Biotechnology Yonsei University  Seoul Republic of Korea"},{"name":"CellArtgen Inc.  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