{"title":"Perovskite nanocrystals@covalent organic framework as a nanothermometer for sensitive temperature sensing","authors":"Huijun Liang, Xinyu wang and Hongjun Chen","doi":"10.1039/D5AY00891C","DOIUrl":null,"url":null,"abstract":"<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<small><sub>3</sub></small> NCs@COF–V). Different temperature-response fluorescence behaviors originate from the photoluminescence of CsPbBr<small><sub>3</sub></small> NCs at 522 nm. CsPbBr<small><sub>3</sub></small> 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<small><sub>3</sub></small> NCs.</p>","PeriodicalId":64,"journal":{"name":"Analytical Methods","volume":" 30","pages":" 6209-6214"},"PeriodicalIF":2.6000,"publicationDate":"2025-07-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Analytical Methods","FirstCategoryId":"92","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2025/ay/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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