文献类型：期刊文献

英文题名：Perovskite quantum dots encapsulated in electrospun fiber membranes as multifunctional supersensitive sensors for biomolecules, metal ions and pH

作者：Wang, Yuanwei[1];Zhu, Yihua[1];Huang, Jianfei[2];Cai, Jin[1];Zhu, Jingrun[1];Yang, Xiaoling[1];Shen, Jianhua[1];Li, Chunzhong[1]

机构：[1]East China Univ Sci & Technol, Key Lab Ultrafine Mat, Minist Educ, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[2]Univ Calif Santa Barbara, Dept Chem & Biochem, Santa Barbara, CA 93106 USA

年份：2017

卷号：2

期号：4

起止页码：225

外文期刊名：NANOSCALE HORIZONS

收录：;EI(收录号：20180704793388);WOS:【SCI-EXPANDED(收录号:WOS:000404347300006)】；

基金：The authors are grateful to the National Natural Science Foundation of China (21471056, 21236003, 21206042, 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), and the Project funded by China Postdoctoral Science Foundation (2014M560307 and 2015T80408).

语种：英文

外文关键词：Bromine compounds - Electrospinning - Frequency modulation - Metal ions - Metals - Energy transfer - Optical properties - Perovskite - Lead compounds - Polymethyl methacrylates - Semiconductor quantum dots

摘要：CsPbBr3 perovskite quantum dots (CPBQDs) have exhibited excellent optical properties, which implies their potential as an appealing candidate for fluorescence resonance energy transfer (FRET) based detection. In this work, in order to enhance the subsurface concentration of CPBQDs, which is important for the efficiency of FRET detection, a nanoscale polymethyl methacrylate (PMMA) fiber membrane (d approximate to 400 nm) encapsulated with CPBQDs (CPBQDs/PMMA FM) is fabricated using an electrospinning method. The CPBQD/PMMA FM possesses comparable optical properties to CPBQDs, high quantum yields (88%) and a narrow half-peak width (similar to 14 nm). The sensing of trypsin is realized via the cleavage of peptide CF6 (Cys-Pro-Arg-Gly-R6G) and an extremely low detection limit of 0.1 mu g mL(-1) has been reached. Besides, owing to the high efficiency FRET process between the CPBQD/PMMA FM and cyclam-Cu2+, an unprecedented detection limit of Cu2+ has been pushed to 10(-15) M. Furthermore, the pH value can be confirmed by the membrane in 10 ppb hydrazide R6G ethanol solution. The excellent optical characteristics of CPBQDs, high CPBQD subsurface concentration of the CPBQD/PMMA FM and robust durability of the PMMA coating all contribute to the outstanding sensitivity and stable detection performance of the CPBQD/PMMA FM.