文献类型： 外文期刊

作者： Wang, Xiaoyuan ¹ ; Duan, Qianqian ¹ ; Zhang, Boye ¹ ; Cheng, Xiaoliang ³ ; Wang, Shuhua ³ ; Sang, Shengbo ¹ ;

作者机构： 1.Taiyuan Univ Technol, Coll Informat & Comp, Micronano Syst Res Ctr, Minist Educ, Taiyuan 030024, Peoples R China

2.Taiyuan Univ Technol, Coll Informat & Comp, Key Lab Adv Transducers & Intelligent Control Sys, Minist Educ, Taiyuan 030024, Peoples R China

3.Inst Anim Husb & Vet Shanxi Acad Agr Sci, Taiyuan 030032, Shanxi, Peoples R China

关键词： carbon quantum dots; gold nanoclusters; Cd2+detection; ratiometric FL nanoprobe; FL enhancement

期刊名称：MICROCHEMICAL JOURNAL （ 2020影响因子：4.821； 五年影响因子：4.364 ）

ISSN： 0026-265X

年卷期： 2021 年 167 卷

页码：

收录情况： SCI

摘要： A new enhanced fluorescent (FL) ratio probe for Cd2+ detection was developed. The gold nanoclusters (AuNCs) with red FL were used as internal reference FL molecules, and the nitrogen and sulfur co-doped carbon quantum dots (N,S-CDs) with blue FL were used as analysis signal molecules. The FRET effect between AuNCs and N,S-CDs result in the FL quenching. The added Cd2+ interacts with AuNCs to form complexes, and interacts with the oxygen atoms in the hydroxyl and carboxyl groups of N,S-CDs to form a stable complex that made N,S-CDs/ AuNCs aggregate and resulted in the FL enhancement. The FL intensities of N,S-CDs (F435) and AuNCs (F630) increased to different degrees after Cd2+ added. The ratio of FL intensity F435/F630 exhibited a good linear relationship with Cd2+ concentration in the range of 0-2.1 mu M, and the detection limit in tap water was calculated to be 62 nM. The reliability of the prepared FL ratio probe was also demonstrated in actual water samples.