文献类型：期刊文献

英文题名：CsPbBr3 Perovskite Quantum Dots-Based Monolithic Electrospun Fiber Membrane as an Ultrastable and Ultrasensitive Fluorescent Sensor in Aqueous Medium

作者：Wang, Yuanwei[1];Zhu, Yihua[1];Huang, Jianfei[1];Cai, Jin[1];Zhu, Jingrun[1];Yang, Xiaoling[1];Shen, Jianhua[1];Jiang, Hao[1];Li, Chunzhong[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Minist Educ, Key Lab Ultrafine Mat, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2016

卷号：7

期号：21

起止页码：4253

外文期刊名：JOURNAL OF PHYSICAL CHEMISTRY LETTERS

收录：;EI(收录号：20164603010798);WOS:【SCI-EXPANDED(收录号:WOS:000387205000003)】；

基金：The authors are grateful to the National Natural Science Foundation of China (21236003, 21322607, 21406072, 21471056, 21676093 and 91534202), Shanghai Educational Development Foundation (14CG29), the Basic Research Program of Shanghai (15JC1401300), the Key Scientific and Technological Program of Shanghai (14521100800), the International Science and Technology Cooperation Program of China (2015DFA51220), Project funded by China Postdoctoral Science Foundation (2014M560307, 2015T80408), Program for New Century Excellent Talents in University (NCET-13-0796).

语种：英文

外文关键词：Lead compounds - Solutions - Electrospinning - Bromine compounds - Semiconductor quantum dots - Energy transfer - Nanocrystals - Frequency modulation - Optical properties

摘要：Perovskite quantum dots with excellent optical properties and robust durability stand as an appealing and desirable candidate for fluorescence resonance energy transfer (FRET) based fluorescence detection, a powerful technique featuring excellent accuracy and convenience. In this work, a monolithic super hydrophobic polystyrene fiber membrane with CsPbBr3 perovskite quantum dots encapsulated within (CPBQDs/PS FM) was prepared via one-step electrospinning. Coupling CPBQDs with PS matrix, this CPBQDs/PS FM composite exhibits high quantum yields (similar to 91%), narrow half-peak width (similar to 16 nm), nearly 100% fluorescence retention after being exposed to water for 10 days and 79.80% fluorescence retention after 365 nm UV-light (1 mW/cm(2)) illumination for 60 h. Thanks to the outstanding optical property of CPBQDs, an ultralow detection limit of 0.01 ppm was obtained for Rhodamine 6G (R6G) detection, with the FRET efficiency calculated to be 18.80% in 1 ppm R6G aqueous solution. Electrospun as well-designed fiber membranes, CPBQDs/PS FM composite also possesses good tailorability and recyclability, showing exciting potential for future implementation into practical applications.