We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Polydopamine-encapsulated carbon dots to boost analytical performance for microplastics detection in fluorescence mode
AI summary Read the abstract
Sulfur-doped carbon dots encapsulated with polydopamine (S-CDs@PDA) were used to detect polyethylene microplastics via fluorescence, showing 21.3% higher fluorescence signal and 8% better detection efficiency than uncoated carbon dots on modified membrane substrates.
A kind of sulfur-doped carbon dots was prepared which were encapsulated with polydopamine (S-CDs@PDA) that has fluorescence response on polyethylene (PE) microplastics (MPs). Modified membranes were constructed using S-CDs@PDA for MP detection. Through heating and vacuum filtration process, yellow emission from the modified membrane appeared because of the combination between S-CDs@PDA and PE MPs. Notably, the fluorescence signal value of PE MPs detected by S-CDs@PDA-modified membrane was 21.3% higher than that of unmodified S-CDs membrane, and the detection efficiency was 8% higher than that of S-CDs membrane. The minimum detection limit for modified membranes was 4 mg. Due to the good adhesion of polydopamine (PDA), S-CDs@PDA-modified membrane was more easily adhered to PE MPs, showing its excellent detection ability. The rapid quantitative detection of PE MPs in 10 min was realized with a linear equation of y = 3081x + 3686.1 in a linear range of 4-14 mg. Such modified membrane exhibited excellent anti-photobleaching using continuous 365-nm excitation and its sensing performance was further confirmed in sea and river water samples. S-CDs@PDA could detect solid MP powders as well as MPs dispersed in liquids. The detection method constructed with a modified glass fiber filter membrane enables rapid identification and quantitative detection of PE MPs without relying on large-scale instrumentation. This study provided research ideas for fluorescent tracing of PE MPs and paved the way for quantitative detection of micron-sized plastics with smaller particle sizes.
More Papers Like This
Colorimetric and fluorescent probes based on carbon dots: for visual detection of different types of microplastics
AI summary
This study applied remote sensing techniques to detect ocean plastic accumulations off the South African coast, using satellite imagery to identify surface plastic concentrations. The research demonstrates the feasibility of satellite-based plastic monitoring in the South Atlantic and Indian Ocean convergence zone.
Advances and prospects of carbon dots for microplastic analysis
AI summary Read the abstract
This review assessed the potential of carbon dots, luminescent nanomaterials derived from carbon sources, as tools for microplastic detection and analysis in food and environmental samples, offering advantages in sensitivity and selectivity over conventional methods. The authors identify carbon dot-based sensing as a promising direction for filling the gap in standardized microplastic analytical methods.
Nitrogen-Doped Carbon Dots Derived from Onion Peel (Allium cepa) for Fluorescence-Based Detection of Microplastics
AI summary Read the abstract
Researchers synthesized fluorescent nitrogen-doped carbon dots from onion peel and used them to detect high-density and low-density polyethylene microplastics, finding that the particles produced excitation-dependent fluorescence that enabled selective detection of both plastic types.
Revolutionizing microplastic detection in water through quantum dot fluorescence
AI summary Read the abstract
Researchers developed a novel approach using carbon quantum dots to stain microplastics, enabling fluorescence-based detection in water at low cost and with simple synthesis, demonstrating high sensitivity and selectivity without the toxicity concerns of conventional fluorescent dyes.
Fluorescent carbon dot embedded polystyrene particle: an alternative to fluorescently tagged polystyrene for fate of microplastic studies: a preliminary investigation
AI summary Read the abstract
Researchers synthesized polystyrene particles with embedded carbon dots to create stable fluorescent microplastic tracers, eliminating the dye-leaching artifacts that plague conventional fluorescently labeled particles used in fate-and-transport studies. This more reliable labeling method will improve the accuracy of laboratory experiments tracking microplastic movement through water, soil, and biological systems.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.