Shi Lihong, Chang Dan, Zhang Guomei, Zhang Caihong, Zhang Yan, Dong Chuan, Chu Lanling, Shuang Shaomin
College of Chemistry and Chemical Engineering, Shanxi University Taiyuan 030006 PR China
School of Light Industry and Food Engineering, Nanjing Forestry University Jiangsu Province 210037 China.
RSC Adv. 2019 Dec 16;9(70):41361-41367. doi: 10.1039/c9ra09405a. eCollection 2019 Dec 9.
Green-fluorescent N-doped carbon dots (N-CDs) have been successfully fabricated using hydrothermal treatment of tyrosine and urea. The N-CDs obtained showed excitation-independent emission, superior stability and strong photoluminescence with a quantum yield of . 9.8%. Based on these striking behaviors, the as-prepared N-CDs have been utilized in Co detection and temperature sensing. Due to an inner filter effect, the N-CDs obtained were dramatically quenched by Co with linear ranges of 0.1 μM-10 μM, 25 μM-275 μM and 300 μM-400 μM, and they had a detection limit of 0.15 μM. The use of the as-prepared N-CDs has been extended to visualize Co fluctuations in living cells. Additionally, the N-CDs obtained have also been applied for use as a temperature sensor with a linear range of 25-80 °C.
通过对酪氨酸和尿素进行水热处理，成功制备了绿色荧光氮掺杂碳点（N-CDs）。所获得的N-CDs表现出与激发无关的发射、优异的稳定性和强烈的光致发光，量子产率为9.8%。基于这些显著特性，所制备的N-CDs已被用于钴检测和温度传感。由于内滤效应，所获得的N-CDs被钴显著猝灭，线性范围为0.1 μM - 10 μM、25 μM - 275 μM和300 μM - 400 μM，检测限为0.15 μM。所制备的N-CDs已被用于可视化活细胞中钴的波动。此外，所获得的N-CDs还被用作温度传感器，线性范围为25 - 80°C。
