Fluorescent nanothermometers for remote temperature measurement at the micro/nanoscale have stimulated growing efforts in developing efficient temperature-responsive materials and detection procedures.However,the effi...Fluorescent nanothermometers for remote temperature measurement at the micro/nanoscale have stimulated growing efforts in developing efficient temperature-responsive materials and detection procedures.However,the efficient collection and transmission of optical signals have been a tremendous challenge for practical applications of these nanothermometers.Herein,we design an all-fiberized thermometry based on a fiber-coupled microsphere cavity coated with thermo-sensitive NaYF_(4)∶20%Yb^(3+);2%Er^(3+)@NaYF_(4)nanocrystals(NCs),allowing for spatial temperature sensing with resolution down to the few-micrometer scale.In our design,the microsphere efficiently excites the NCs and collects their upconversion emissions,and the use of a fiber splitter coupled with the microsphere allows for lossless routing of excitation and emitted light.We demonstrate the use of this all-fiber temperature sensor in diverse environments,especially in strongly acidic and alkaline conditions.Leveraging the high flexibility of commercial silica fiber,this all-fiber temperature ensor was employed for stable fixed-point real-time temperature measurement and multipurpose temperature recording/mapping in opaque environments,microscale areas,various solutions,and complicated bent structures.Thus,the demonstrated design could have strong implications for the practical use of nanothermometers in various possible scenarios,especially monitoring temperatures in diverse physiological settings.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.52202004,62122027,12204179,62205109,and 62075063)the Key R&D Program of Guangzhou(Grant No.202007020003)+4 种基金the fellowship of China Postdoctoral Science Foundation(Grant Nos.2021M691054 and 2022M711185)the Guangdong Basic and Applied Basic Research Foundation(Grant Nos.2021A1515110475,2021A1515110911,2022A1515011289,and 2023A1515012666)the Guangzhou Basic and Applied Basic Research Foundation(Grant Nos.202201010428 and 202201010407)the Local Innovative and Research Teams Project of Guangdong Pearl River Talents Program(Grant No.2017BT01X137)the State Key Lab of Luminescent Materials and Devices,South China University of Technology.
文摘Fluorescent nanothermometers for remote temperature measurement at the micro/nanoscale have stimulated growing efforts in developing efficient temperature-responsive materials and detection procedures.However,the efficient collection and transmission of optical signals have been a tremendous challenge for practical applications of these nanothermometers.Herein,we design an all-fiberized thermometry based on a fiber-coupled microsphere cavity coated with thermo-sensitive NaYF_(4)∶20%Yb^(3+);2%Er^(3+)@NaYF_(4)nanocrystals(NCs),allowing for spatial temperature sensing with resolution down to the few-micrometer scale.In our design,the microsphere efficiently excites the NCs and collects their upconversion emissions,and the use of a fiber splitter coupled with the microsphere allows for lossless routing of excitation and emitted light.We demonstrate the use of this all-fiber temperature sensor in diverse environments,especially in strongly acidic and alkaline conditions.Leveraging the high flexibility of commercial silica fiber,this all-fiber temperature ensor was employed for stable fixed-point real-time temperature measurement and multipurpose temperature recording/mapping in opaque environments,microscale areas,various solutions,and complicated bent structures.Thus,the demonstrated design could have strong implications for the practical use of nanothermometers in various possible scenarios,especially monitoring temperatures in diverse physiological settings.
