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Here, a class of all\u2010dry, self\u2010adhesive epidermal electrodes is presented by\u00a0integrating low\u2010density, octopus\u2010like microstructures with porous subsurface architectures. This design offers key advantages, including low electrode\u2010skin impedance, high air permeability, dynamic adhesion to prevent interfacial delamination, and mild adhesion strength for safe\u2010and\u2010easy removal. The electrodes enable stable, high\u2010quality recordings over 24 h, maintaining signal integrity even under repeated skin deformation. Preclinical studies in healthy subjects demonstrate effective electrophysiological monitoring near the wrist and eye for &gt; 24 h, highlighting potential applications in long\u2010term, non\u2010invasive monitoring scenarios such as neonatal intensive care unit monitoring, home healthcare, and sleep studies.<\/jats:p>","DOI":"10.1002\/smll.202507416","type":"journal-article","created":{"date-parts":[[2025,10,25]],"date-time":"2025-10-25T08:46:11Z","timestamp":1761381971000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["All\u2010Dry Self\u2010Adhesive Soft Electrodes with Subsurface Pores for Long\u2010Term Skin Recording"],"prefix":"10.1002","volume":"21","author":[{"given":"Min Soo","family":"Jeon","sequence":"first","affiliation":[{"name":"School of Mechanical Engineering Hanyang University  Seoul 04763 Republic of 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