文献类型：期刊文献

英文题名：Hairy Fluorescent Nanospheres Based on Polyelectrolyte Brush for Highly Sensitive Determination of Cu(II)

作者：Wang, Qiaoling[1];Chen, Kaimin[1];Qu, Yi[1];Li, Kai[1];Zhang, Ying[2];Fu, Enyu[1]

机构：[1]Shanghai Univ Engn Sci, Coll Chem & Chem Engn, Shanghai 201620, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China

年份：2020

卷号：12

期号：3

外文期刊名：POLYMERS

收录：;EI(收录号：20201508380160);WOS:【SCI-EXPANDED(收录号:WOS:000525952000076)】；

基金：This research was funded by the National Natural Science Foundation of China (21504052 and 21404068).

语种：英文

外文关键词：fluorescent nanosphere; 5-aminofluorescein; copper ion detector; coupling

摘要：Currently, it is an ongoing challenge to develop fluorescent nanosphere detectors that are uniform, non-toxic, stable and bearing a large number of functional groups on the surface for further applications in a variety of fields. Here, we have synthesized hairy nanospheres (HNs) with different particle sizes and a content range of carboxyl groups from 4 mmol/g to 9 mmol/g. Based on this, hairy fluorescent nanospheres (HFNs) were prepared by the traditional coupling method (TCM) or adsorption-induced coupling method (ACM). By comparison, it was found that high brightness HFNs are fabricated based on HNs with poly (acrylic acid) brushes on the surface via ACM. The fluorescence intensity of hairy fluorescent nanospheres could be controlled by tuning the content of 5-aminofluorescein (5-AF) or the carboxyl groups of HNs easily. The carboxyl content of the HFNs could be as high as 8 mmol/g for further applications. The obtained HFNs are used for the detection of heavy metal ions in environmental pollution. Among various other metal ions, the response to Cu (II) is more obvious. We demonstrated that HFNs can serve as a selective probe and for the separation and determination of Cu(II) ions with a linear range of 0-0.5 mu M and a low detection limit of 64 nM.