期刊
NANO
卷 17, 期 1, 页码 -出版社
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S1793292022500035
关键词
Carbon quantum dots (CQDs); Pseudomonas aeruginosa; hexavalent chromium (Cr6+); biological imaging
资金
- National Natural Science Foundation of China [31960232]
N-CQDs synthesized by hydrothermal carbonization are efficient detectors of Cr6+, capable of detecting it in plants and cells and staining cell structures. The study provides theoretical guidance for the development of bacterial resources.
Hexavalent chromium (Cr6+), a heavy metal ion, is widely used in a variety of industries, but it is an environmental pollutant and a recognized human carcinogen. Highly selective quantitative detection of Cr6+ is important for environmental pollution monitoring and early disease prevention in humans. In this study, nitrogen-containing carbon quantum dots (N-CQDs) were synthesized by hydrothermal carbonization of Pseudomonas aeruginosa and were found to be efficient detectors of Cr6+, with a detection limit (LOD) of 0.23 nmol L-1(nM). N-CQDs were detectable in plant leaves and onion cells and successfully stained cell membranes and nuclei. Multi-colored images revealed that in Caenorhabditis elegans, N-CQDs entered the digestive tract through ingestion, spared rapidly throughout the body, and were excreted though the anus within 40 min. Synthesis of fluorescent N-CQDs can be exploited to increase the use and a range of applications of bacterial resources. The study methods and results also provide theoretical guidance for future research into the development of bacterial resources.
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