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Nevertheless, conventional ACEs are often produced by the creation of geometric structures through pore\u2010forming techniques on conductive elastomers, which substantially compromise their mechanical and conductive performance. Inspired by the composite structure of skin comprising collagen fibers and elastin, this study reports an integrated auxetic conductive elastomer (IACE) composite composing a high\u2010modulus conductive elastomer as the auxetic skeleton and a low\u2010modulus conductive elastomer as the soft matrix. Benefitting from the covalent interlinkages and topological entanglements at the skeleton\u2010matrix interface, the IACE is flat and void\u2010free with no abrupt soft\u2010to\u2010hard transition. Compared to the auxetic skeleton alone, the IACE exhibits enhanced mechanical properties, including a fracture stress of 2.6\u00a0MPa, an elongation at break of 457%, and a toughness of 7.2\u00a0MJ m\n                    <jats:sup>\u22123<\/jats:sup>\n                    . Furthermore, its auxetic behavior with NPR effect is consistently observed across a wide strain range of 0\u201385%. Leveraging the unique ion transport pathway enabled by auxetic deformation, the IACE demonstrates reliable sensing performance with improved sensitivity over a broad deformation range. This work presents a promising strategy for developing ACEs with the robust interface and wide auxetic strain, advancing their potentials in intelligent flexible electronics.\n                  <\/jats:p>","DOI":"10.1002\/smll.202504272","type":"journal-article","created":{"date-parts":[[2025,5,27]],"date-time":"2025-05-27T09:43:57Z","timestamp":1748339037000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Bioinspired Integrated Auxetic Conductive Elastomer Composite With High Stretchability and Robust Interface"],"prefix":"10.1002","volume":"21","author":[{"given":"Jiawei","family":"Li","sequence":"first","affiliation":[{"name":"Beijing Advanced Innovation Center for Soft Matter Science and Engineering Beijing University of Chemical Technology  North Third Ring Road 15, Chaoyang District Beijing 100029 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