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Carboxyl-Rich Carbon Dots as Highly Selective and Sensitive Fluorescent Sensor for Detection of $Fe^{3+}$ in Water and Lactoferrin
| Content Provider | MDPI |
|---|---|
| Author | Wang, Xinxin Zhao, Yanan Wang, Ting Liang, Yan Zhao, Xiangzhong Tang, Ke Guan, Yutong Wang, Hua |
| Copyright Year | 2021 |
| Description | As lactoferrin (LF) plays an essential role in physiological processes, the detection of LF has attracted increasing attention in the field of disease diagnosis. However, most current methods require expensive equipment, laborious pretreatment, and long processing time. In this work, carboxyl-rich carbon dots (COOH-CDs) were facilely prepared through a one-step, low-cost hydrothermal process with tartaric acid as the precursor. The COOH-CDs had abundant carboxyl on the surface and showed strong blue emission. Moreover, COOH-CDs were used as a fluorescent sensor toward $Fe^{3+}$ and showed high selectivity for $Fe^{3+}$ with the limit of detection (LoD) of 3.18 nM. Density functional theory (DFT) calculations were performed to reveal the mechanism of excellent performance for $Fe^{3+}$ detection. Meanwhile, COOH-CDs showed no obvious effect on lactobacillus plantarum growth, which means that COOH-CDs have good biocompatibility. Due to the nontoxicity and excellent detection performance for $Fe^{3+}$, COOH-CDs were employed as a fluorescent sensor toward LF and showed satisfying performance with an LoD of 0.776 µg/mL, which was better than those of the other methods. |
| Starting Page | 4317 |
| e-ISSN | 20734360 |
| DOI | 10.3390/polym13244317 |
| Journal | Polymers |
| Issue Number | 24 |
| Volume Number | 13 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2021-12-09 |
| Access Restriction | Open |
| Subject Keyword | Polymers Analytical Chemistry Carbon Dots Dft Calculations Fe3+ Lactoferrin Fluorescent Sensor |
| Content Type | Text |
| Resource Type | Article |
