%0 Journal Article
%T Green synthesis of yeast cell wall-derived carbon quantum dots with multiple biological activities.
%A Mirseyed PS
%A Arjmand S
%A Rahmandoust M
%A Kheirabadi S
%A Anbarteh R
%J Heliyon
%V 10
%N 9
%D 2024 May 15
%M 38699041
%F 3.776
%R 10.1016/j.heliyon.2024.e29440
%X <B>UNASSIGNED: </B>Yeast cell walls are a sustainable biomass source containing carbon and other elements like phosphorus. Converting cell walls into valuable nanomaterials like carbon quantum dots (CQDs) is of interest.<BR><B>UNASSIGNED: </B>Cell walls from Saccharomyces cerevisiae were hydrothermally treated in 0.5 M H2SO4 to produce CQDs. Multiple analytical techniques were utilized to confirm phosphorus-doping (P-CQDs), characterize the fluorescence properties, determine quantum yield, and evaluate the sensing, antimicrobial, photocatalytic, and antioxidant capacities.<BR><B>UNASSIGNED: </B>A successful synthesis of P-CQDs was achieved with strong blue fluorescence under UV excitation, 19 % quantum yield, and excellent stability. The P-CQDs showed sensitive fluorescence quenching in response to ferric ions with a 201 nM detection limit. Antibacterial effects against Escherichia coli and Staphylococcus aureus were demonstrated. P-CQDs also exhibited dye degradation under sunlight and antioxidant activity. So, the prepared P-CQDs displayed promising multifunctional capabilities for metal ion detection, disinfection, and environmental remediation. Further research is required to fully realize and implement the multifunctional potential of P-CQDs in real-world applications.