School of Chemical Engineering, Hebei University of Technology, Tianjin 300130, People's Republic of China.
Methods Appl Fluoresc. 2019 Apr 11;7(3):035001. doi: 10.1088/2050-6120/ab11a3.
The carbon dots (CDs) was prepared by a facile hydrothermal treatment of citric acid and glycine at 180 °C. The CDs at around 3.2 nm was collected after filtration and dialysis. The sample displayed green fluorescence (G-CDs) with a quantum yield of 3.7% in high concentration and the strongest emission peak was at 545 nm under the excitation wavelength of 480 nm; the blue fluorescence CDs (B-CDs) with a quantum yield of 29.8% was obtained after diluted either in solution or in powder, the strongest emission peak was located at 475 nm under the excitation wavelength of 380 nm. The G-CDs possessed a high selectivity to Fe, which was in a linear range of 0-3.5 μM with the detection limit of 0.21 μM. The CDs powder with blue fluorescence at a relative low content was obtained and adaptable for the fingerprint detection on substrates of litmus paper, resin tabletop, glass, and orange plastic ruler.
将柠檬酸和甘氨酸在 180°C 下进行简单的水热处理可制备碳点（CDs）。过滤和透析后收集约 3.2nm 的 CDs。该样品在高浓度下显示出绿色荧光（G-CDs），量子产率为 3.7%，在 480nm 的激发波长下最强发射峰位于 545nm；在溶液或粉末中稀释后可得到蓝色荧光 CDs（B-CDs），量子产率为 29.8%，在 380nm 的激发波长下最强发射峰位于 475nm。G-CDs 对 Fe 具有高选择性，其线性范围为 0-3.5μM，检测限为 0.21μM。以相对较低的含量获得了具有蓝色荧光的 CDs 粉末，适用于在石蕊纸、树脂桌面、玻璃和橙色塑料尺等基底上进行指纹检测。
