文献类型：期刊文献

英文题名：Nanosensors Based on Structural Memory Carbon Nanodots for Ag+ Fluorescence Determination

作者：Zhou, Xi[1,2,3] Cao, Yufeng[1] Zhou, Xinji[1] Xu, Lina[2,3] Zhang, Daihui[1,2,3] Wang, Chunpeng[2,3] Chu, Fuxiang[2,3] Qian, Tao[1]

第一作者：Zhou, Xi

通信作者：Qian, T[1];Chu, FX[2];Chu, FX[3]

机构：[1]Nantong Univ, Sch Chem & Chem Engn, Nantong 226019, Peoples R China;[2]Chinese Acad Forestry, Inst Chem Ind Forestry Prod, Nanjing 210042, Peoples R China;[3]Nanjing Forestry Univ, Coinnovat Ctr Efficient Proc & Utilizat Forest Re, Nanjing 210037, Peoples R China

年份：2021

卷号：11

期号：10

外文期刊名：NANOMATERIALS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000736690700001)】；

基金：This work was funded by National Key Research and Development Program of China (No. 2017YFE0106800) and the National Natural Science Foundation of China (No. 32001284).

语种：英文

外文关键词：carbon nanodots; silver ion; fluorescent sensor; structural memory; intracellular imaging

摘要：Ag+ pollution is of great harm to the human body and environmental biology. Therefore, there is an urgent need to develop inexpensive and accurate detection methods. Herein, ligninderived structural memory carbon nanodots (C-SM-dots) with outstanding fluorescence properties were fabricated via a green method. The mild preparation process allowed the C-SM-dots to remain plentiful phenol, hydroxyl, and methoxy groups, which have a specific interaction with Ag+ through the reduction of silver ions. Further, the sulfur atoms doped on C-SM-dots provided more active sites on their surface and the strong interaction with Ag nanoparticles. The C-SM-dots can specifically bind Ag+, accompanied by a remarkable fluorescence quenching response. This "turn-off" fluorescence behavior was used for Ag+ determination in a linear range of 5-290 mu M with the detection limit as low as 500 nM. Furthermore, findings showed that this sensing nano-platform was successfully used for Ag+ determination in real samples and intracellular imaging, showing great potential in biological and environmental monitoring applications.