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We developed a photocurable composite film comprising copper-based benzene-1,3,5-tricarboxylate (HKUST-1) and butyl methacrylate (BMA) via ultraviolet crosslinking. HKUST-1 possesses a three-dimensional interconnected pore structure with uniform-sized nanocage windows (0.69\u20131.08 nm). The high density of Cu\n                    <jats:sup>2+<\/jats:sup>\n                    sites enables rapid acetylene capture, achieving a rapid response time of 15 s. Coating the fiber tip with HKUST-1 creates a Fabry\u2013P\u00e9rot interferometer structure. Experimental gas adsorption tests and optical simulations validated the sensing probe\u2019s efficacy, demonstrating a sensitivity of 0.531 pm ppm\n                    <jats:sup>\u22121<\/jats:sup>\n                    , a resolution of 0.716 ppm, and a detection limit of 2.11 ppm. The integration of metal\u2013organic frameworks nanoscale confinement effects with photopolymerization presents a promising strategy for nano-engineered gas sensing.\n                  <\/jats:p>","DOI":"10.1088\/1361-6528\/ae43f4","type":"journal-article","created":{"date-parts":[[2026,2,10]],"date-time":"2026-02-10T22:48:02Z","timestamp":1770763682000},"page":"085501","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":1,"title":["Micro-gas optical-fiber detection based on metal\u2013organic framework films by photocurable deposition"],"prefix":"10.1088","volume":"37","author":[{"given":"Weilong","family":"Mao","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xuran","family":"Zhu","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6228-5238","authenticated-orcid":true,"given":"Bowei","family":"Zhang","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fuzhen","family":"Xuan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"266","published-online":{"date-parts":[[2026,2,23]]},"reference":[{"key":"nanoae43f4bib1","doi-asserted-by":"publisher","DOI":"10.1016\/j.rser.2024.114327","type":"journal-article","article-title":"Research progress on oil-immersed transformer mechanical condition identification based on vibration signals","volume":"196","author":"Sun","year":"2024","journal-title":"Renew. 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