{"title":"Perovskite nanocrystals@covalent organic framework as a nanothermometer for sensitive temperature sensing.","authors":"Huijun Liang, Xinyu Wang, Hongjun Chen","doi":"10.1039/d5ay00891c","DOIUrl":null,"url":null,"abstract":"<p><p>Perovskite nanocrystal-based temperature sensors have drawn extensive attention. Improving the photostability of perovskites and their sensitivity to temperature are urgent issues that need to be addressed. Herein, a nanothermometer for color-changing temperature indicators is designed based on perovskite nanocrystals encapsulated in a covalent organic framework (CsPbBr<sub>3</sub> NCs@COF-V). Different temperature-response fluorescence behaviors originate from the photoluminescence of CsPbBr<sub>3</sub> NCs at 522 nm. CsPbBr<sub>3</sub> NCs@COF-V achieves temperature sensing in the range of 20-89 °C and shows high potential as a thermometer for monitoring the body temperature. Significantly, spherical COF-V boosts fluorescence stability, fluorescence lifetime, and sensitivity to temperature of CsPbBr<sub>3</sub> NCs.</p>","PeriodicalId":64,"journal":{"name":"Analytical Methods","volume":" ","pages":""},"PeriodicalIF":2.7000,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Analytical Methods","FirstCategoryId":"92","ListUrlMain":"https://doi.org/10.1039/d5ay00891c","RegionNum":3,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, ANALYTICAL","Score":null,"Total":0}
引用次数: 0
Abstract
Perovskite nanocrystal-based temperature sensors have drawn extensive attention. Improving the photostability of perovskites and their sensitivity to temperature are urgent issues that need to be addressed. Herein, a nanothermometer for color-changing temperature indicators is designed based on perovskite nanocrystals encapsulated in a covalent organic framework (CsPbBr3 NCs@COF-V). Different temperature-response fluorescence behaviors originate from the photoluminescence of CsPbBr3 NCs at 522 nm. CsPbBr3 NCs@COF-V achieves temperature sensing in the range of 20-89 °C and shows high potential as a thermometer for monitoring the body temperature. Significantly, spherical COF-V boosts fluorescence stability, fluorescence lifetime, and sensitivity to temperature of CsPbBr3 NCs.
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