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Driven by this, the past several years have witnessed a surge in engineering macrotexture to reduce solid\u2010liquid contact time. Despite these advances, these strategies in reducing contact time necessitate the elegant control of either the spatial location for droplet contact or the range of impacting velocity. Here, this work circumvents these limitations by designing a dual gradient surface consisting of a vertical spacing gradient made of tapered pillar arrays and a lateral curvature gradient characterized as macroscopic convex. This design enables the impacting droplets to self\u2010adapt to asymmetric or pancake bouncing mode accordingly, which renders significant contact time reduction (up to \u224870%) for a broad range of impacting velocities (\u22480.4\u20131.4 m\u00a0s\n                    <jats:sup>\u22121<\/jats:sup>\n                    ) irrespective of the spatial impacting location. This new design provides a new insight for designing liquid\u2010repellent surfaces, and offers opportunities for applications including dropwise condensation, energy conversion, and anti\u2010icing.\n                  <\/jats:p>","DOI":"10.1002\/smll.202304635","type":"journal-article","created":{"date-parts":[[2023,10,3]],"date-time":"2023-10-03T02:09:38Z","timestamp":1696298978000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":10,"title":["Self\u2010Adaptive Droplet Bouncing on a Dual Gradient Surface"],"prefix":"10.1002","volume":"21","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7400-8879","authenticated-orcid":false,"given":"Chenyang","family":"Wu","sequence":"first","affiliation":[{"name":"Department of Mechanical Engineering City University of Hong Kong  Hong Kong 999077 China"},{"name":"Hong Kong Center for Cerebro\u2010Cardiovascular Health Engineering (COCHE)  Hong Kong 999077 China"}]},{"given":"Xuezhi","family":"Qin","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering City University of Hong Kong  Hong Kong 999077 China"},{"name":"School of Mechanical and Aerospace Engineering Jilin University  Changchun Jilin 130025 China"}]},{"given":"Huanxi","family":"Zheng","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering Hong Kong Polytechnic University  Hong Kong 999077 China"}]},{"given":"Zhenyu","family":"Xu","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering City University of Hong Kong  Hong Kong 999077 China"}]},{"given":"Yuxin","family":"Song","sequence":"additional","affiliation":[{"name":"Department of Mechanical Engineering City University of Hong Kong  Hong Kong 999077 China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3781-1045","authenticated-orcid":false,"given":"Yuankai","family":"Jin","sequence":"additional","affiliation":[{"name":"Department of 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