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However, conventional designs often suffer from limited sensitivity and uniaxial force detection, restricting their applicability in complex environments. Here, a bioinspired omnidirectional iontronic sensor (BOIS) is presented, engineered via triboelectric coupling and featuring a cross\u2010scale architecture inspired by the spatial encoding properties of cochlear cilia. Through the integration of a 70\u00b0 inclined macroscopic ciliary array based on Fibonacci helix optimization and 3D printing technology, the sensor achieves high\u2010resolution detection of both normal and shear forces. The incorporation of iontronic effects further enhances sensitivity via synergistic charge modulation. The resulting flexible sensing platform demonstrates excellent mechanical compliance, multi\u2010axis responsiveness, and high precision in monitoring dynamic joint motions such as wrist bending and finger flexion. This work offers a robust strategy for advancing omnidirectional tactile sensing, with promising applications in medical rehabilitation, soft robotics, and HMI.<\/jats:p>","DOI":"10.1002\/smll.202510157","type":"journal-article","created":{"date-parts":[[2026,1,20]],"date-time":"2026-01-20T17:58:30Z","timestamp":1768931910000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":3,"title":["Bioinspired Omnidirectional Iontronic Sensors Based on Triboelectric Charge"],"prefix":"10.1002","volume":"22","author":[{"given":"Zunkang","family":"Zhou","sequence":"first","affiliation":[{"name":"Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences  Beijing 101400 China"},{"name":"School of Nanoscience and Engineering University of Chinese Academy of Sciences  Beijing 100049 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-2290-6873","authenticated-orcid":false,"given":"Yan","family":"Du","sequence":"additional","affiliation":[{"name":"Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of Sciences  Beijing 101400 China"},{"name":"School of Nanoscience and Engineering University of Chinese Academy of Sciences  Beijing 100049 China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuyang","family":"Zhang","sequence":"additional","affiliation":[{"name":"The University of Manchester  Manchester M13 9PL UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jie","family":"Fu","sequence":"additional","affiliation":[{"name":"ZHEJIANG WANSHENG CO., LTD.  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