Red/orange dual-emissive carbon dots for pH sensing and cell imaging  

作　　者：Miaoran Zhang Rigu Su Jian Zhong Ling Fei Wei Cai Qingwen Guan Weijun Li Neng Li Yusheng Chen Lulu Cai Quan Xu 

机构地区：[1]State Key Laboratory of Heavy Oil Processing, Beijing Key Laboratory of Biogas Upgrading Utilization, China University of Petroleum (Beijing), Beijing 102249, China [2]Personalized Drug Therapy Key Laboratory of Sichuan Province, Department of Pharmacy, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu 611731, China [3]School of Pharmacy, North Sichuan Medical College, Nanchong 637000, China [4]Chemical Engineering Department, University of Louisiana at Lafayette, Lafayette, LA 70504, USA [5]State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China [6]Department of Chemistry, University of Akron, Akron, OH 44325, USA

出　　处：《Nano Research》2019年第4期815-821,共7页纳米研究（英文版）

基　　金：Beijing Nova Program Interdisciplinary Studies Cooperative Project (No. Z181100006218138);Science Foundation of China University of Petroleum-Beijing (No. 2462018BJC004);National Key Specialty Construction Project of Clinical Pharmacy (No. 30305030698);Research Funding of Sichuan Provincial Peoples Hospital (No. 2017LY08) for the support.

摘　　要：The dual-emissive N,S co-doped carbon dots (N,S-CDs) with a long emission wavelength were synthesized via solvothermal method.The N,S-CDs possess relatively high photoluminescence (PL) quantum yield (QY) (35.7%) towards near-infrared fluorescent peak up to 648 nm.With the advanced characterization techniques including X-ray photoelectron spectroscopy (XPS),Fourier transform infrared spectroscopy (FTIR),etc.It is found that the doped N,S elements play an important role in the formation of high QY CDs.The N,S-CDs exist distinct pH-sensitive feature with reversible fluorescence in a good linear relationship with pH values in the range of 1.0-13.0.What is more,N,S-CDs can be used as an ultrasensitive Ag+ probe sensor with the resolution up to 0.4 μM.This finding will expand the application of as prepared N,S-CDs in sensing and environmental fields.

关 键 词：carbon cell imaging dual-emissive PHOTOLUMINESCENCE PH-SENSITIVE AG^+ PROBE 

分 类 号：O4[理学—物理]