文献类型：期刊文献

英文题名：Fluorescence-enhanced microfluidic sensor for highly sensitive in-situ detection of copper ions in lubricating oil

作者：Gao, Yuefeng[1];Pan, Xinxiang[1,4];Xu, Sai[2];Liu, Zhijian[1];Wang, Junsheng[3];Yu, Kezhen[1];Wang, Chengfa[1];Yuan, Haichao[1];Wu, Sen[1]

机构：[1]Dalian Maritime Univ, Coll Marine Engn, Dalian 116026, Liaoning, Peoples R China;[2]Dalian Maritime Univ, Sch Sci, Dalian 116026, Liaoning, Peoples R China;[3]Dalian Maritime Univ, Coll Informat & Sci Technol, Dalian 116026, Liaoning, Peoples R China;[4]Guangdong Ocean Univ, Coll Nav, Zhanjiang 524088, Guangdong, Peoples R China

年份：2020

卷号：191

外文期刊名：MATERIALS & DESIGN

收录：SCI-EXPANDED(收录号：WOS:000536937200085)、、EI(收录号：20201508387800)、Scopus(收录号：2-s2.0-85082728469)、WOS

基金：This research is supported by National Natural Science Foundation of China (11704056, 51909019), National Key Research and Development Program of China (2017YFC1404603, 2017YFC1404606), Fundamental Research Funds for the Central Universities (3132019338, 3132019186), Natural Science Foundation of Liaoning Province (2019MS029), Dalian Science and Technology Innovation Fund (2018J11CY021) and China Postdoctoral Science Foundation (2018T110212, 2016M591420).

语种：英文

外文关键词：PMMA opal photonic crystals; Fluorescence-enhanced probe; Copper ions in-situ detection; High sensitivity; Perovskites quantum dots; Microfluidic

外文摘要：Sensitive on-line detection of Cu2+ in lubricating oil of marine power plant is important for displaying equipment wear status and fault pre-judgment in real time. However, there are few reports on in-situ, portable and highly sensitive Cu2+ detection devices in organic media before. In this report, CsPbBr3 perovskite quantum dots (PQDs) are employed as fluorescence probe for Cu2+ detection in microfluidic chip. The size effect of the CsPbBr3 QDs on the detection performances is firstly investigated. To obtain preferable sensitivity and detection limit, polymethyl methacrylate opal photonic crystals (PMMA OPCs) film is developed as microfluidic sensor substrate, which can tremendously improve the fluorescence intensity of PQDs as high as 26-fold. The enhancement effect can be attributed to the coupling between photonic crystal stopband effect and the excitation light field. Moreover, the use of photomultiplier module for fluorescence signal measurement enables the detection device to be portable. The novel strategy offers the advantages of higher sensitivity (8.62 mu M-1) and lower detection limit (0.40 nM). Otherwise, this sensor also provides wide detection range and good selectivity, thus, it will have potential in oil quality in-situ detection and mechanical wear prediction in the future. (C) 2020 The Authors. Published by Elsevier Ltd.