Hao Xiaohui, Shen Ao, Duan Ruochen, Zhang Panqing, Zhao Xiuqing, Wang Xuebing, Li Xue, Zhang Zeyu, Yang Yunxu
School of Chemistry and Bialogical Engineering, University of Science and Technology Beijing, Beijing 100083, China.
Institute of Chemistry, Henan Academy of Sciences, Zhengzhou 450002, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2024 Nov 15;321:124661. doi: 10.1016/j.saa.2024.124661. Epub 2024 Jun 13.
A ratiometric fluorescent and colorimetric detecting assay for NO was realized by a hybrid nanosensor (Co-CDs@R-CDs) utilizing firstly through the redox reaction of nitrite (NO) with Co, of which the hybrid nanosensor Co-CDs@R-CDs was fabricated by Co-doped carbon dots (Co-CDs) and a reference of red-emitting carbon dots (R-CDs). The ratiometric fluorescent linear detection range of NO was 2.5-45 μM and the limit of detection (LOD) was 0.068 μM with the response time of 120 s. While, the colorimetric linear detection range of NO was 2.5-60 μM and the LOD was 0.075 μM. In addition, a portable smartphone system which could measure the R (red), G (green), and B (blue) values of the fluorescence and the visible color of the coated Co-CDs@R-CDs paper strip-based sensor had also been developed and successfully applied to detect NO in sausage, pickles and tap water samples.
一种用于检测一氧化氮（NO）的比率荧光和比色检测方法通过一种混合纳米传感器（Co-CDs@R-CDs）得以实现，该方法首先利用亚硝酸盐（NO）与钴的氧化还原反应，其中混合纳米传感器Co-CDs@R-CDs由钴掺杂碳点（Co-CDs）和作为参比的发红光碳点（R-CDs）制备而成。NO的比率荧光线性检测范围为2.5 - 45 μM，检测限（LOD）为0.068 μM，响应时间为120秒。同时，NO的比色线性检测范围为2.5 - 60 μM，LOD为0.075 μM。此外，还开发了一种便携式智能手机系统，该系统能够测量基于涂覆Co-CDs@R-CDs纸条的传感器的荧光以及可见颜色的R（红）、G（绿）和B（蓝）值，并成功应用于检测香肠、泡菜和自来水样品中的NO。
