| Autor: |
Tiange Li, Tiantian Wu, Meiju Lu, Ning Li, Yan Ma, Lianjun Song, Xianqing Huang, Jiansheng Zhao, Tianlin Wang |
| Jazyk: |
angličtina |
| Rok vydání: |
2024 |
| Předmět: |
|
| Zdroj: |
Food Chemistry: X, Vol 24, Iss , Pp 101834- (2024) |
| Druh dokumentu: |
article |
| ISSN: |
2590-1575 |
| DOI: |
10.1016/j.fochx.2024.101834 |
| Popis: |
The excessive presence of Cu2+ could be harmful to human health. Therefore, a ratiometric fluorescence sensor based on multicolor fluorescent carbon dots (CDs) was developed for Cu2+ detection. The blue and yellow carbon dots (B-CDs/Y-CDs) were synthesized by one-step hydrothermal method. After adding Cu2+, it is captured by the amino groups of B-CDs to form complexes, resulting in a strong fluorescence quenching via photoinduced electron transfer (PET). Meanwhile, the amino groups from Y-CDs also binds with Cu2+ that inhibit the internal PET thus enhancing the fluorescence of Y-CDs. The sensor has the merits in rapid, visual, and selective with a low limit of detection (LOD) at 2.29 nM. Furthermore, an intelligent device composed of portable optical detector and smartphone is constructed, which realizes the visual point-of-care testing (POCT) of Cu2+ with a LOD of 7.51 nM. The strategy provides an accessible approach for monitoring heavy metal pollution and food safety. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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