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This work addresses this gap by developing a heterostructured Co\n                    <jats:sub>3<\/jats:sub>\n                    O\n                    <jats:sub>4<\/jats:sub>\n                    @Co\n                    <jats:sub>3<\/jats:sub>\n                    (HITP)\n                    <jats:sub>2<\/jats:sub>\n                    chemiresistor for hydrogen sulfide (H\n                    <jats:sub>2<\/jats:sub>\n                    S) sensing. The decoration of Co\n                    <jats:sub>3<\/jats:sub>\n                    (HITP)\n                    <jats:sub>2<\/jats:sub>\n                    with Co\n                    <jats:sub>3<\/jats:sub>\n                    O\n                    <jats:sub>4<\/jats:sub>\n                    nanoparticles facilitates carrier transfer and lowers the activation energy for H\n                    <jats:sub>2<\/jats:sub>\n                    S reaction. The optimized sensor demonstrates notable sensitivity, with response values (\n                    <jats:italic>\n                      R\n                      <jats:sub>g<\/jats:sub>\n                      \/R\n                      <jats:sub>a<\/jats:sub>\n                    <\/jats:italic>\n                    ) of 3.0 and 1.4 toward 10\u00a0ppm H\n                    <jats:sub>2<\/jats:sub>\n                    S at 25\u00b0C and 40\u00b0C, respectively. The excellent low\u2010temperature performance is primarily attributed to the Co\n                    <jats:sub>3<\/jats:sub>\n                    (HITP)\n                    <jats:sub>2<\/jats:sub>\n                    . As a proof\u2010of\u2010concept, a portable device with a smartphone interface was employed to monitor H\n                    <jats:sub>2<\/jats:sub>\n                    S released from pork spoilage at both temperatures. It is important to note that early spoilage involves complex volatile profiles, and sole reliance on H\n                    <jats:sub>2<\/jats:sub>\n                    S detection may be limited due to potential temporal mismatches with other key spoilage markers. This study presents a functionalization strategy to extend cMOF\u2010based sensing into lower temperature regimes, offering a material platform for chilled meat safety monitoring while acknowledging the constraints of single\u2010analyte detection for early warning.\n                  <\/jats:p>","DOI":"10.1002\/advs.202521071","type":"journal-article","created":{"date-parts":[[2026,1,15]],"date-time":"2026-01-15T19:11:22Z","timestamp":1768504282000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["A Novel Co\n                    <sub>3<\/sub>\n                    O\n                    <sub>4<\/sub>\n                    @Co\n                    <sub>3<\/sub>\n                    (HITP)\n                    <sub>2<\/sub>\n                    \u2010Based Sensor for Low\u2010Temperatures H\n                    <sub>2<\/sub>\n                    S Detection: Fabrication, Performance, and Preliminary Exploration in Monitoring Pork Spoilage"],"prefix":"10.1002","volume":"13","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0368-6987","authenticated-orcid":false,"given":"Yongjiao","family":"Sun","sequence":"first","affiliation":[{"name":"Center of Micro\/Nano Devices and Intelligent Sensing College of Electronic Information Engineering Taiyuan University of Technology  Taiyuan Shanxi P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Rongrong","family":"He","sequence":"additional","affiliation":[{"name":"Center of Micro\/Nano Devices and Intelligent Sensing College of Electronic Information Engineering Taiyuan University of Technology  Taiyuan Shanxi P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Wuchao","family":"Tian","sequence":"additional","affiliation":[{"name":"Center of Micro\/Nano Devices and Intelligent Sensing College of Electronic Information Engineering Taiyuan University of Technology  Taiyuan Shanxi P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bingliang","family":"Wang","sequence":"additional","affiliation":[{"name":"Center of Micro\/Nano Devices and Intelligent Sensing College of Electronic Information Engineering Taiyuan University of Technology  Taiyuan Shanxi P. R. 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