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Here, directed acoustic construction (DAC) technology is employed to fabricate fingerprint\u2010inspired elastomeric microstructures with intra\u2010layer gradient properties, and the underlying mechanisms of acoustic curing, particle reinforcement, and property tuning are revealed. The acoustic\u2010induced curing of polydimethylsiloxane (PDMS) arises from synergistic physical, chemical, and mechanical effects. The incorporation of diamond particles into the PDMS matrix reinforces all three acoustic effects, thereby promoting polymerization and curing, which in turn broadens the tunable range of properties via acoustic waves. DAC enables omnidirectional patterning of microstructures and wide\u2010range gradient modulation, with feature sizes of approximately 200\u00a0\u00b5m. The resulting microstructure exhibits distinct inner\u2013outer mechanical responses, producing a linear contact area\u2013pressure relationship that enhances sensitivity and linearity. Compared with those of the uniform microstructures, the force sensing sensitivity is improved by 52.06%. When integrated onto a robotic fingertip as a functional sensing layer, it can distinguish fine textures and detect multidirectional forces. DAC enables site\u2010specific quantitative modulation and rapid fabrication (within 10\u00a0min), expanding its applications in micro\/nanofabrication and flexible sensing.<\/jats:p>","DOI":"10.1002\/advs.78376","type":"journal-article","created":{"date-parts":[[2026,10,21]],"date-time":"2026-10-21T05:30:54Z","timestamp":1792560654000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Mechanism of Direct Acoustic Construction and Gradient Properties Tuning"],"prefix":"10.1002","author":[{"given":"Dandan","family":"Wu","sequence":"first","affiliation":[{"name":"School of Electromechanical Engineering Guangdong University of Technology  Guangzhou China"},{"name":"State Key Laboratory For High Performance Tools Guangdong University of Technology  Guangzhou Guangdong China"},{"name":"Guangdong Provincial Key Laboratory of Minimally Invasive Surgical Instruments and Manufacturing Technology Guangdong University of 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