@article{Zhang2019, 
author = {Miaoran Zhang and Rigu Su and Jian Zhong and Ling Fei and Wei Cai and Qingwen Guan and Weijun Li and Neng Li and Yusheng Chen and Lulu Cai and Quan Xu},
title = {Red/orange dual-emissive carbon dots for pH sensing and cell imaging},
year = {2019},
journal = {Nano Research},
volume = {12},
number = {4},
pages = {815-821},
keywords = {photoluminescence, pH-sensitive, carbon cell imaging, dual-emissive, Ag+ probe},
url = {https://www.sciopen.com/article/10.1007/s12274-019-2293-z},
doi = {10.1007/s12274-019-2293-z},
abstract = {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.}
}