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Adv."],"published-print":{"date-parts":[[2026,7,10]]},"abstract":"<jats:p>Grasping objects such as handles, mice, and phones plays a central role in human-machine interaction, yet the contact surfaces of the hand, despite their exquisite tactile sensitivity, are rarely exploited as channels for information transfer. Here, we introduce transdermal all-directional targeting (TADT), a static-contact interface design strategy that converts passive grip surfaces into active tactile displays, allowing users to grasp stably while receiving spatially and temporally evolving information on the fingertips. TADT enhances sub-actuator-pitch energy delivery by integrating a microtextured skin-coupling interface with phase-controlled vibrotactile actuation, thereby generating steerable three-dimensional tactile foci beneath the skin, enabling &gt;200-hertz vibration and sub-actuator-pitch spatial super-resolution. Psychophysical experiments show that TADT lowers detection thresholds by 30% and reduces power consumption by 80% compared with designs without TADT. Using static grip alone, users reliably identified six directional cues and completed nonvisual indoor navigation and virtual reality interaction tasks, demonstrating a compact, energy-efficient modality for expressive tactile communication.<\/jats:p>","DOI":"10.1126\/sciadv.aef2372","type":"journal-article","created":{"date-parts":[[2026,7,8]],"date-time":"2026-07-08T18:00:55Z","timestamp":1783533655000},"update-policy":"https:\/\/doi.org\/10.34133\/aaas_crossmark","source":"Crossref","is-referenced-by-count":1,"title":["Transforming static interfaces into tactile channels with steerable transdermal foci"],"prefix":"10.1126","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0519-1830","authenticated-orcid":true,"given":"Qiutong","family":"Liu","sequence":"first","affiliation":[{"name":"CTSIRI-PolyU Joint Lab, Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong SAR, China."},{"name":"Research Institute for Intelligent Wearable Systems, 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