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Article Abstract
Graphene oxide quantum dots (GOQDs) with a high quantum yield (50%) were synthesized using soot collected from a motorcycle (petroleum vehicle) exhaust pipe and applied as sensors for ferrocyanide ([Fe(CN)]) ions and as bioimaging agents in a cancer cell line. X-ray photoelectron spectroscopy (XPS) data for the GOQDs revealed a C/O ratio of 2.49, which was close to that of graphene oxide (GO). The synthesized GOQDs exhibited strong blue fluorescence. High sensitivity to detect [Fe(CN)] was reported in GOQDs with a detection limit of 0.46 nmol mL, and a strong linear relationship was achieved in the concentration range of 100-1100 μg L. The results demonstrate the utility of GOQDs for detecting [Fe(CN)] in a real scenario. The GOQDs exhibited almost negligible cytotoxicity in cells and were internalized within 4 h of incubation, emitting blue fluorescence in the cytoplasm. This suggests that the GOQDs are promising bioimaging agents for biomedical applications. In general, these waste-derived GOQDs appear to be good chemo- and biosensing probes for real-life applications.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC12004190 | PMC |
| http://dx.doi.org/10.1021/acsomega.5c00229 | DOI Listing |
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