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Here we describe a microfluidic method to create EGaIn droplets and capsules with adjustable dimensions and mechanical and surface properties. The acidity level of the suspending fluid, ethanol, determines whether EGaIn will create oxide\u2010covered capsules or non\u2010oxidized liquid droplets. The oxide coating stabilizes spherical shapes, which deform irreversibly. Droplets readily reform into spheres after applied stress is removed, but are susceptible to coalescence. A thiolated PEG\u2013click complex forms self\u2010assembling structures at metal\u2013liquid interfaces to protect droplets from merging while allowing surface modification. When cast in thin films, the fluidic\u2010generated EGaIn structures exhibit different electromechanical responses: oxide\u2010coated capsules function as field\u2010effect elements while thiol\u2010stabilized droplets operate as ohmic conductors. By integrating microfluidic generation, shape programmability, and chemical stabilization, we open new pathways to multifunctional liquid\u2013metal architectures with controllable electromechanical\u00a0response.<\/jats:p>","DOI":"10.1002\/smll.73329","type":"journal-article","created":{"date-parts":[[2026,4,17]],"date-time":"2026-04-17T15:08:17Z","timestamp":1776438497000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Fluidic\u2010Enabled Formation of EGaIn Capsules and Droplets With Tunable Surface Chemistry and Electromechanics"],"prefix":"10.1002","volume":"22","author":[{"given":"Benjamin N.","family":"Muller","sequence":"first","affiliation":[{"name":"Department of Chemistry and Chemical Biology Northeastern University Boston Massachusetts USA"},{"name":"Division of Gastroenterology Brigham and Women's Hospital Harvard Medical School Boston Massachusetts USA"},{"name":"Department of Mechanical Engineering Massachusetts Institute of Technology Cambridge Massachusetts USA"},{"name":"Broad Institute of MIT and Harvard Cambridge Massachusetts USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Avi J.","family":"Patel","sequence":"additional","affiliation":[{"name":"Department of Chemical Engineering Northeastern University Boston Massachusetts USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Giovanni","family":"Traverso","sequence":"additional","affiliation":[{"name":"Division of Gastroenterology Brigham and Women's Hospital Harvard Medical School Boston Massachusetts USA"},{"name":"Department of Mechanical Engineering Massachusetts Institute of Technology Cambridge Massachusetts USA"},{"name":"Broad Institute of MIT and Harvard Cambridge Massachusetts USA"},{"name":"David H. 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