摘要
The optical properties of CdSe/ZnS quantum dots(QDs)embedded in polydimethylsiloxane(PDMS)flexible materials after irradiated withγ-rays were studied.As an embedding matrix,PDMS exhibits the advantage of high radiation hardness.The luminescence spectra and fluorescence lifetime of the irradiated and unirradiated samples were tested.The fluorescence intensity of QDs decreases with the increase of the irradiation dose according to the result of luminescence spectra.The fluorescence intensity of the QDs decreases by 80%after irradiation with a dose of 1 kGy,but the position of the emission peak and the spectral shape of the QDs remain consistent before and after irradiation.In addition,the fluorescence lifetime of QDs is shortened after irradiation.Based on the fluorescence response of QDs to the irradiation ofγ-rays and combined with flexible materials,our work provides a theoretical basis for the application of QDs as a new wearable dosimeter.
基金
National Natural Science Foundation of China(No.51775522)
Scientific and Technologial Innovation Programs of Higher Education Institutions in Shanxi Province(No.2020L0638)
Shanxi Province Key Laboratory of Quantum Sensing and Precision Measurement(No.201905D121001)
Shanxi“1331 Project”Key Subjects Construction
Applied Basic Research Program in Shanxi Province(Nos.201901D211203,201801D221230)。
