@article{Chao2020, 
author = {Daiyong Chao and Jinxing Chen and Qing Dong and Weiwei Wu and Desheng Qi and Shaojun Dong},
title = {Ultrastable and ultrasensitive pH-switchable carbon dots with high quantum yield for water quality identification, glucose detection, and two starch-based solid-state fluorescence materials},
year = {2020},
journal = {Nano Research},
volume = {13},
number = {11},
pages = {3012-3018},
keywords = {carbon dot, high quantum yield, pH-ultrasensitive optical properties, water quality identification, glucose detection, solid-state fluorescence materials},
url = {https://www.sciopen.com/article/10.1007/s12274-020-2965-8},
doi = {10.1007/s12274-020-2965-8},
abstract = {It is attractive and encouraging to develop new fluorescent carbon dots (CDs) with excellent optical properties and promising applications prospects. Herein, highly-efficient green emissive CDs (m-CDs) with a high quantum yield (QY) of 71.7% in water are prepared through a facile solvothermal method. Interestingly, the m-CDs exhibit excellent fluorescence stability in the pH range of 1-9. However, the fluorescence intensity of the m-CDs is almost completely quenched as the pH is increased from 9 to 10. The mechanism of the unique pH-responsive behavior is discussed in detail and a plausible mechanism is proposed. Owing to the unique pH-responsive behavior, the m-CDs are used as a on-off fluorescent probe for water quality identification. By combining the reversible pH-ultrasensitive optical properties of the m-CDs in the pH range of 9-10 with the glucose oxidase-mimicking (GOx-mimicking) ability of Au nanoparticles (AuNPs), glucose can be quantitatively detected. Finally, two environment-friendly starch-based solid-state fluorescence materials (powder and film) are developed through green preparation routes.}
}