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By growing a multilayer of MOFs on the inner surface of the microcavity, the sensitivity is significantly enhanced, with distinct behaviors observed when detecting ethanol solution concentrations lower or higher than 0.1%. Compared to a pure silica microbubble cavity, the sensitivity is enhanced by 47 times and 7 times at lower and higher concentrations, respectively. The knowledge gained on sensitivity enhancement of microcavities induced by surface functionalization will guide the combinations of novel materials and optical sensors for superior detection demands.<\/jats:p>","DOI":"10.1364\/oe.565435","type":"journal-article","created":{"date-parts":[[2025,5,12]],"date-time":"2025-05-12T17:00:42Z","timestamp":1747069242000},"page":"23065","update-policy":"https:\/\/doi.org\/10.1364\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["In-situ synthesis of zeolitic imidazolate framework-8 on an optical microbubble cavity for enhanced ethanol sensing"],"prefix":"10.1364","volume":"33","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6585-4918","authenticated-orcid":true,"given":"Yanyan","family":"Zhi","sequence":"first","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02xe5ns62","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Li","family":"Liu","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02xe5ns62","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yan","family":"Huang","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02xe5ns62","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4185-8543","authenticated-orcid":true,"given":"Li-Peng","family":"Sun","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02xe5ns62","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2950-9882","authenticated-orcid":true,"given":"Wei","family":"Wang","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02xe5ns62","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jie","family":"Li","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02xe5ns62","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4137-870X","authenticated-orcid":true,"given":"Jiejun","family":"Zhang","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02xe5ns62","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-6877-7057","authenticated-orcid":true,"given":"Jianping","family":"Yao","sequence":"additional","affiliation":[{"name":"University of Ottawa"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3790-2986","authenticated-orcid":true,"given":"Bai-Ou","family":"Guan","sequence":"additional","affiliation":[{"id":[{"id":"https:\/\/ror.org\/02xe5ns62","id-type":"ROR","asserted-by":"publisher"}]}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"285","published-online":{"date-parts":[[2025,5,23]]},"reference":[{"key":"oe-33-11-23065-R1","doi-asserted-by":"publisher","first-page":"1199","DOI":"10.3390\/s19051199","volume":"19","author":"Erfkamp","year":"2019","journal-title":"Sensors"},{"key":"oe-33-11-23065-R2","doi-asserted-by":"publisher","first-page":"104406","DOI":"10.1016\/j.yrtph.2019.104406","volume":"107","author":"Srdjenovic","year":"2019","journal-title":"Regul. 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