{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,2]],"date-time":"2026-09-02T11:17:56Z","timestamp":1788347876909,"version":"build-2803163510"},"reference-count":41,"publisher":"Wiley","license":[{"start":{"date-parts":[[2026,9,2]],"date-time":"2026-09-02T00:00:00Z","timestamp":1788307200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"},{"start":{"date-parts":[[2026,9,2]],"date-time":"2026-09-02T00:00:00Z","timestamp":1788307200000},"content-version":"tdm","delay-in-days":0,"URL":"http:\/\/doi.wiley.com\/10.1002\/tdm_license_1.1"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Small"],"abstract":"<jats:title>ABSTRACT<\/jats:title>\n                  <jats:p>Oscillatory fluid flows underpin transport, mixing, and signal propagation in living systems, yet artificial microfluidic platforms rely almost extensively on external power or chemically driven gradients to reproduce such dynamics. Here, we introduce a fuel\u2010free strategy based on photo\u2010mechanical transduction, in which light is directly converted into mechanical deformation of soft matter to generate reversible and oscillatory fluid flow without gradients. We demonstrated that azobenzene\u2010doped liquid crystal films convert photochemical isomerization into amplified contractile\u2010expansive motion, producing directional and oscillatory flows without chemical fuels, ionic gradients or waste generation. Temporal modulation of light enables programmable flow oscillation that accelerates enzyme kinetics under confinement. Remarkably, the same photo\u2010mechanical mechanism extends seamlessly from microfluidic channels to macroscopic floater at the air\u2010water interface, giving rise to autonomous motion with tunable trajectories. Our findings establish photo\u2010mechanical soft matter as a general platform for gradient\u2010free oscillatory flow and autonomous motion, opening a new direction for lab\u2010on\u2010a\u2010chip technologies, bio\u2010inspired transport, and light driven soft\u2010robotics.<\/jats:p>","DOI":"10.1002\/smll.75590","type":"journal-article","created":{"date-parts":[[2026,9,2]],"date-time":"2026-09-02T11:01:26Z","timestamp":1788346886000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Photoactuated Micropumps Enable Oscillatory Fluidics and Autonomous Locomotion"],"prefix":"10.1002","author":[{"given":"Devender","family":"Singh","sequence":"first","affiliation":[{"name":"Energy and Environment Unit Institute of Nano Science and Technology  Mohali Punjab India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Sudip","family":"Bera","sequence":"additional","affiliation":[{"name":"Energy and Environment Unit Institute of Nano Science and Technology  Mohali Punjab India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Arshdeep Kaur","family":"Gill","sequence":"additional","affiliation":[{"name":"Energy and Environment Unit Institute of Nano Science and Technology  Mohali Punjab India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Reek","family":"Mahapatra","sequence":"additional","affiliation":[{"name":"Energy and Environment Unit Institute of Nano Science and Technology  Mohali Punjab India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Deepika","family":"Sharma","sequence":"additional","affiliation":[{"name":"CSIR\u2010Central Scientific Instruments Organisation  Chandigarh India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1799-1421","authenticated-orcid":false,"given":"Kamlesh","family":"Kumar","sequence":"additional","affiliation":[{"name":"Department of Chemistry University of Delhi  Delhi India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Naveen","family":"Tiwari","sequence":"additional","affiliation":[{"name":"Department of Chemical Engineering Indian Institute of Technology  Kanpur Uttar Pradesh India"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4099-7880","authenticated-orcid":false,"given":"Debabrata","family":"Patra","sequence":"additional","affiliation":[{"name":"Energy and Environment Unit Institute of Nano Science and Technology  Mohali Punjab India"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2026,9,2]]},"reference":[{"key":"e_1_2_8_2_1","doi-asserted-by":"publisher","DOI":"10.1038\/nrm2530"},{"key":"e_1_2_8_3_1","doi-asserted-by":"publisher","DOI":"10.1007\/s41981\u2010020\u201000105\u20106"},{"key":"e_1_2_8_4_1","doi-asserted-by":"crossref","first-page":"1827","DOI":"10.3390\/mi14101827","article-title":"Microfluidic Mixing: a Physics\u2010Oriented Review","volume":"14","author":"Saravanakumar S. 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